HK40073112A - Methods of treating, reducing the incidence of, and/or preventing ischemic events - Google Patents

Description

Methods of treating, reducing the incidence of, and/or preventing ischemic events

The application is a divisional application of Chinese patent application with the application date of 2013, 5 and 29, and the application number of 201380076382.X, and the invention name of the method for treating ischemic events, reducing the occurrence of ischemic events and/or preventing the ischemic events.

Cross Reference to Related Applications

The present application is a partial continuation of U.S. application serial No. 13/792,056 filed on 9/3/2013, which is a partial continuation of U.S. application serial No. 12/943,717 filed on 10/11/2010, which claims priority to U.S. provisional application serial No. 61/260,361 filed on 11/2009. This application also claims priority from U.S. provisional application serial No. 61/815,735 filed on 25.4.4.2013. Each of these applications is incorporated herein by reference.

Technical Field

The present application relates to methods of treating, reducing the incidence of, and/or preventing ischemic events in a patient receiving Percutaneous Coronary Intervention (PCI) comprising administering to the patient a pharmaceutical composition comprising cangrelor. The method may further comprise administering to the patient an additional therapeutic agent, such as a different P2Y ₁₂ And (3) an inhibitor. The present invention also relates to pharmaceutical compositions useful for treating, reducing the incidence of, and/or preventing ischemic events in patients receiving PCI. The pharmaceutical composition comprises cangrelor. The invention also relates to a method of preparing a pharmaceutical composition for treating, reducing the incidence of, and/or preventing an ischemic event in a patient receiving PCI, the method comprising admixing cangrelor with one or more pharmaceutically acceptable excipients. Ischemic events may include stent thrombosis, myocardial infarction, ischemia-driven revascularization (IDR), and death.

Background

PCI is a procedure to open a stenotic artery supplying blood to the heart muscle. PCI with stent grafting is widely used to reduce the risk of death or myocardial infarction in patients with acute coronary syndromes and to reduce the burden of angina pectoris and improve the quality of life in patients with stable angina pectoris ¹ . However, thrombotic complications during and after PCI are a major problem, especially if the procedure involves implantation of a stent, which may induce platelet adhesion, activation and thrombosis on or near the stent ² . Therefore, the temperature of the molten metal is controlled,antiplatelet therapy is an important adjunct to PCI ³ 。

Inhibition of the platelet Adenosine Diphosphate (ADP) receptor P2Y by drug therapy has been demonstrated ₁₂ Will improve cardiovascular prognosis in patients receiving PCI ⁴ . Such antiplatelet therapy reduces the risk of ischemic events, in particular stent thrombosis ⁵ . However, for oral administration P2Y ₁₂ The use of receptor inhibitors has several limitations. For example, when these drugs are administered, even when administered at the initial dose, a delayed onset of action occurs ⁶ This is particularly problematic for patients requiring urgent or perioperative treatment. Furthermore, patients in the acute phase of cardiovascular disease may suffer from disease conditions such as nausea, impaired absorption or impaired perfusion which may limit the bioavailability of the drug; in such patients, the antiplatelet effect of oral antiplatelet agents such as clopidogrel may be insufficient ⁷ . Moreover, several studies have now demonstrated the widespread use of P2Y ₁₂ The pharmacokinetic and pharmacodynamic effects of the inhibitor clopidogrel are highly variable ⁸ And may be affected by genetic polymorphisms ⁹ Translation thereof into differential pharmacokinetics and therapeutic response leading to the clopidogrel "low/non-responder" concept ¹⁰ . In addition, many physicians avoid administering clopidogrel prior to the definition of angiographies for coronary artery dissection, because this irreversible platelet inhibitor is associated with an increased risk of perioperative bleeding if coronary artery bypass surgery is required rather than percutaneous revascularization. More potent oral ADP blockers have been tested and found to further reduce ischemic prognosis, but with increased bleeding rates ¹¹ 。

Thus, despite advances in adjuvant drug therapy, there is concern over ischemic events in patients receiving PCI ¹² . Thus, there is a continuing need for effective, fast-acting, reversible anti-platelet agents that effectively treat, reduce the incidence of, and/or prevent ischemic events without the risk of excessive bleeding.

Disclosure of Invention

The present invention demonstrates how cangrelor can be used to treat, reduce the incidence of, and/or prevent ischemic events. Ischemic events may include stent thrombosis, myocardial infarction, IDR, and death. Ischemic events can occur before, during, or after PCI.

One aspect of the invention relates to a method of treating, reducing the occurrence of, and/or preventing an ischemic event in a patient receiving PCI. The method comprises administering to the patient a pharmaceutical composition comprising cangrelor. The pharmaceutical compositions may be administered by various routes of administration before, during and/or after PCI. For example, the pharmaceutical composition may be administered intravenously, including as a bolus and/or infusion. In addition, the pharmaceutical composition may be administered to a patient receiving PCI including stent grafting. The methods of the invention can treat, reduce the occurrence of, and/or prevent an ischemic event during or after PCI. In some cases, the method is not accompanied by a significant increase in severe bleeding or the need for blood transfusion.

In certain embodiments of the invention, the method may further comprise administering to the patient an additional therapeutic agent. The additional therapeutic agent may be administered separately, sequentially or simultaneously with the pharmaceutical composition comprising cangrelor. Alternatively, the additional therapeutic agent can be administered in the same pharmaceutical composition as cangrelor. In some embodiments, the additional therapeutic agent comprises P2Y ₁₂ A therapeutic agent, such as clopidogrel, prasugrel or ticagrelor. In alternative embodiments, the additional therapeutic agent comprises bivalirudin or heparin.

One aspect of the invention relates to a method of transitioning a patient receiving PCI from administration of cangrelor during PCI to administration of P2Y ₁₂ Inhibitors (e.g. oral P2Y) ₁₂ -receptor inhibitors, such as ticagrelor). The methods can comprise (1) initiating administration of an intravenous infusion of a pharmaceutical composition comprising cangrelor prior to PCI, wherein the intravenous infusion comprises a 30 μ g/kg bolus of cangrelorRaloxil followed by 4 μ g/kg/min continuously infused cangrelor, and wherein the continuously infused cangrelor is continued for a longer time: (a) a duration of at least 2 hours or (b) PCI; and (2) administering an oral dose of a pharmaceutical composition comprising ticagrelor during a continuous infusion of cangrelor, wherein the oral dose comprises a 180mg loading dose of ticagrelor. The pharmaceutical composition comprising ticagrelor may be administered during administration of cangrelor by intravenous infusion. For example, a pharmaceutical composition comprising ticagrelor can be administered within 1.25 hours or within 0.5 hours of initiating intravenous infusion of cangrelor. The methods may further comprise administering one or more oral doses of a pharmaceutical composition comprising ticagrelor after the priming dose. The one or more subsequent oral doses may contain 90mg of ticagrelor, and may continue after intravenous infusion of cangrelor.

In some embodiments, the patient receiving PCI is transitioned from administration of cangrelor during PCI to administration of P2Y ₁₂ Inhibitors (e.g. oral P2Y) ₁₂ -a receptor inhibitor, e.g. ticagrelor) may comprise (1) starting administration of an intravenous infusion of a pharmaceutical composition comprising cangrelor prior to PCI, wherein the intravenous infusion comprises a 30 μ g/kg bolus of cangrelor followed by a 4 μ g/kg/min continuous infusion of cangrelor, and wherein the continuous infusion of cangrelor is continued for a longer period of time: (a) a duration of at least 2 hours or (b) PCI; and (2) administering an oral dose of a pharmaceutical composition comprising ticagrelor following the continuous infusion of cangrelor, wherein the oral dose comprises a 180mg loading dose of ticagrelor. The methods may further comprise administering one or more oral doses of a pharmaceutical composition comprising ticagrelor after the priming dose. The one or more subsequent oral doses may comprise 90mg of ticagrelor.

Another aspect of the invention relates to a pharmaceutical composition useful for treating, reducing the incidence of, and/or preventing an ischemic event in a patient receiving PCI. The pharmaceutical composition comprises cangrelor and may further comprise one or more pharmaceutically acceptable excipients. Furthermore, the pharmaceutical composition may be a solid, liquid or suspension. The pharmaceutical compositions of the present invention may be used to treat, reduce the occurrence of, and/or prevent ischemic events that occur during or after PCI. In certain instances, the pharmaceutical composition does not result in a significant increase in severe bleeding or require blood transfusion when administered to a patient receiving PCI.

Another aspect of the invention relates to a method of preparing a pharmaceutical composition for treating, reducing the incidence of, and/or preventing an ischemic event in a patient receiving PCI, the method comprising admixing cangrelor with a pharmaceutically acceptable excipient. The pharmaceutically acceptable excipient may comprise NaCl, glucose, mannitol, or a combination thereof.

Aspects of the invention relate to a method of transitioning a patient from administration of cangrelor during PCI to administration of cangrelor in preparation for surgery, or a method of maintaining reduced platelet activity in a patient transitioning from administration of cangrelor during PCI to administration of cangrelor in preparation for surgery, or a method of maintaining P2Y in a patient transitioning from administration of cangrelor during PCI to administration of cangrelor in preparation for surgery ₁₂ A method of inhibition. These methods can include (1) administering a PCI dosing regimen, wherein the PCI dosing regimen comprises intravenously administering a 30 μ g/kg bolus of cangrelor prior to the onset of PCI and intravenously administering a continuous infusion of cangrelor at an infusion rate of 4 μ g/kg/min after the bolus administration; (2) terminating the PCI dosing regimen; and (3) a bridge dosing regimen, wherein the bridge dosing regimen comprises intravenously administering a continuous infusion of cangrelor at an infusion rate of 0.75 μ g/kg/min.

Aspects of the invention also relate to a method of transitioning a patient from administration of cangrelor in preparation for surgery to administration of cangrelor during PCI, or a method of transitioning from administration of cangrelor in preparation for surgeryMethod of maintaining reduced platelet activity in patients administered cangrelor to PCI or maintaining P2Y in patients transitioning from cangrelor administration in preparation for surgery to cangrelor administration during PCI ₁₂ A method of inhibition. These methods may comprise (1) administering a bridge dosing regimen, wherein the bridge dosing regimen comprises intravenously administering a continuous infusion of cangrelor at an infusion rate of 0.75 μ g/kg/min; (2) terminating the bridge dosing regimen; and (3) administering a PCI dosing regimen, wherein the PCI dosing regimen comprises intravenously administering a 30 μ g/kg bolus of cangrelor prior to the onset of PCI and intravenously administering a continuous infusion of cangrelor at an infusion rate of 4 μ g/kg/min. In another embodiment, the method can comprise (1) administering a bridge dosing regimen, wherein the bridge dosing regimen comprises intravenously administering a continuous infusion of cangrelor at an infusion rate of 0.75 μ g/kg/min; (2) terminating the bridge dosing regimen; and (3) administering a PCI dosing regimen, wherein the PCI dosing regimen comprises intravenously administering a continuous infusion of cangrelor at an infusion rate of 4 μ g/kg/min.

Drawings

The following detailed description, given by way of example and not intended to limit the invention solely to the specific embodiments described, may best be understood in conjunction with the accompanying drawings, in which:

FIG. 1 shows a test plan for the study described in example 1;

FIG. 2 shows a schematic of the intended treatment analysis population of the major modifications in the study described in example 1;

FIGS. 3A, 3B, and 3C show a signature analysis of the Kaplan-Meier curves for the primary efficacy endpoint (FIG. 3A), stent thrombosis (FIG. 3B), and mortality at 48 hours and 30 days (FIG. 3C) in the study described in example 1;

FIG. 4 shows a graph of transfusion rates for all patients in the high risk for bleeding subgroup (including coronary artery bypass graft) in the study described in example 1;

FIG. 5 shows a test design for the study described in example 2;

FIGS. 6A and 6B show the primary endpoint ratio (OR) data for key subgroups in the study described in example 2;

FIG. 7 shows a test design for the study described in example 3;

FIG. 8 shows a schematic of a modified intended treatment population in the study described in example 3;

FIGS. 9A and 9B show a signature analysis of the Kaplan Meier curve for the primary endpoint (FIG. 9A) and the key secondary endpoint for stent thrombosis (FIG. 9B) in the study described in example 3;

FIG. 10 shows a ratiometric plot for a subgroup analysis of the primary efficacy endpoint in the study described in example 3;

FIG. 11 shows a graph of a subgroup analysis of global use of open occlusion coronary strategy (GUSTO) severe or moderate bleeding in the study described in example 3;

figure 12 shows 20 μ M Adenosine Diphosphate (ADP) -induced platelet final aggregation (LTA) in patients administered 180mg ticagrelor during intravenous infusion (at 0.5hr or 1.25hr) or after cangrelor;

FIG. 13 shows LTA induced by 5 and 20 μ M ADP in patients administered 180mg ticagrelor (at 0.5hr or 1.25hr) andP2Y12 determination of the measured platelet reactivity;

figure 14 shows a PD model of PRU response versus cangrelor concentration for patients receiving a PCI dosing regimen and patients receiving a bridge dosing regimen;

FIG. 15 shows the simulated distance of PRU response for a male patient 62 years old and 90kg, transitioning from the bridge dosing regimen to the PCI dosing regimen for the initial dose of a PCI IV bolus (the shaded area is the confidence interval of the line, and the dashed line is the cutoff PRU value of 208, there is P2Y ₁₂ The associated high sensitivity and specificity of inhibition);

FIG. 16 shows the simulated distance of PRU response for a male patient, 62 years old and 90kg, without an initial dose of IV bolus for PCI, transitioning from a bridge dosing regimen to a PCI dosing regimen (negative)The hatched area is the confidence interval of the line, and the dashed line is the cutoff PRU value of 208, there is P2Y ₁₂ The associated high sensitivity and specificity of inhibition);

FIG. 17 shows the simulated distance of PRU response for a female patient 66 years old and 60kg, transitioning from the bridge dosing regimen to the PCI dosing regimen for the initial dose of an IV bolus for PCI (the shaded area is the confidence interval of the line, and the dashed line is the cutoff PRU value of 208, there is P2Y ₁₂ The associated high sensitivity and specificity of inhibition);

FIG. 18 shows the simulated distance of PRU response for a female patient who was 66 years old and 60kg, had no IV bolus initial dose for PCI, had transitioned from the bridge dosing regimen to the PCI dosing regimen (the shaded area is the confidence interval of the line, and the dashed line is the cutoff PRU value of 208, there was P2Y ₁₂ The associated high sensitivity and specificity of inhibition);

FIG. 19 shows simulated distances of PRU responses for male patients, 62 years and 90kg, transitioning from a PCI dosing regimen to a bridge dosing regimen (shaded area is confidence interval of line, and dashed line is cutoff PRU value of 208, presence of P2Y ₁₂ The associated high sensitivity and specificity of inhibition);

FIG. 20 shows simulated distances of PRU responses for female patients, 66 years and 60kg, transitioning from a PCI dosing regimen to a bridge dosing regimen (shaded area is confidence interval of line, and dashed line is cutoff PRU value of 208, presence of P2Y ₁₂ The associated high sensitivity and specificity of inhibition).

Detailed Description

The present invention is based on the discovery that a reversible, rapid-acting, P2Y ₁₂ The adenosine triphosphate analog inhibitor of the ADP receptor cangrelor is effective in treating, reducing the incidence of, and/or preventing ischemic events. Accordingly, the present invention relates to a method of treating, reducing the incidence of, and/or preventing an ischemic event in a patient receiving PCI comprising administering to the patient a pharmaceutical composition comprising cangrelor. Book (I)The invention also relates to a pharmaceutical composition useful for treating, reducing the incidence of, and/or preventing an ischemic event in a patient receiving PCI, wherein the pharmaceutical composition comprises cangrelor, and may further comprise one or more pharmaceutically acceptable excipients. Furthermore, the present invention relates to a method for preparing a pharmaceutical composition for treating, reducing the occurrence of and/or preventing an ischemic event in a patient receiving PCI, the method comprising admixing cangrelor with one or more pharmaceutically acceptable excipients.

Cangrelor

Cangrelor is a non-thienopyridine adenosine triphosphate analogue that reversibly binds to and inhibits P2Y ₁₂ An ADP receptor. Cangrelor is direct acting, reversible and selective, and it has a short half-life. It is metabolized by the dephosphorylation pathway and has a plasma half-life of 3-5 minutes; platelet function returns to normal within 30-60 minutes of drug termination ¹³ . When given as a bolus intravenous injection, it is highly inhibitory to platelets rapidly and continuously, and platelet function normalizes shortly after termination. Phase 2 trials in patients receiving PCI demonstrated similar dose-dependent platelet inhibition, less prolonged bleeding time and faster recovery of platelet function as obtained with abciximab ¹⁴ . The chemical structure of cangrelor is shown as formula I.

In each of the embodiments of the invention, the term "cangrelor" encompasses compounds of formula I and tautomeric, enantiomeric and diastereomeric forms thereof, racemic forms thereof, and pharmaceutically acceptable salts, including the tetrasodium salts, of such compounds. These alternative forms and salts, their methods of preparation and pharmaceutical compositions containing them are well known in the art and are shown, for example, in U.S. patent No. 5,721,219. Additional disclosures regarding the preparation and use of cangrelor can be found in U.S. patent nos. 5,955,447, 6,130,208, and 6,114,313, and U.S. application publication No. 2006/0270607.

Ischemic event

The present invention demonstrates how cangrelor can be used to treat, reduce the incidence of, and/or prevent ischemic events. Ischemic events may include stent thrombosis, myocardial infarction, IDR, and death. Ischemic events can occur before, during, or after PCI.

Stent thrombosis

In certain embodiments, the invention relates to treating, reducing the incidence of, and/or preventing stent thrombosis in a patient receiving PCI. Stent thrombosis may result from any manner of implantation, presence, or maintenance of a stent in a patient's blood vessel. For example, stent thrombosis may be induced by implantation of the stent into a patient, or may develop over time due to the presence of a stent, such as a bare metal stent, a drug eluting stent, or other type of stent. In some embodiments, stent thrombosis is defined in accordance with, or derived from, the Academic Research Consortium definition of stent thrombosis ¹⁵ . In certain embodiments of the invention, stent thrombosis may be intra-operative stent thrombosis, acute stent thrombosis (post-implantation)<24 hours), subacute stent thrombosis (post-implantation)>24 hours and<30 days), late stent thrombosis (post-implantation)>For 30 days and<12 months) or late stent thrombosis (post-implantation>12)。

Myocardial infarction

In certain embodiments, the invention relates to treating, reducing the incidence of, and/or preventing myocardial infarction in patients receiving PCI. The myocardial infarction may be an acute non-ST elevation myocardial infarction (NSTEMI) or an acute ST elevation myocardial infarction (STEMI). In some embodiments, the myocardial infarction is a heart attackDeath is defined by, or derived from, the general definition of myocardial infarction ¹⁶ 。

Myocardial infarction may occur during PCI or may be induced by any mechanism, including implantation of a stent into the patient. Myocardial infarction may also be caused by stent thrombosis or coronary occlusion. Ischemia-driven revascularization (IDR)

In certain embodiments, the invention relates to treating IDR in a patient receiving PCI, reducing the incidence of IDR in a patient receiving PCI, and/or preventing IDR in a patient receiving PCI. IDR refers to any type of intervention after PCI in which blood flow through the vessel must be increased or reestablished. Examples of IDRs include, but are not limited to, additional PCI or surgery.

Death was caused by death

In certain embodiments, the invention relates to reducing the incidence of mortality and/or preventing mortality in patients receiving PCI. In some embodiments, death may be associated with other ischemic events. For example, death may result from stent thrombosis, coronary occlusion, and/or myocardial infarction.

Methods of treating, reducing the incidence of, and/or preventing ischemic events

One aspect of the invention is a method of treating, reducing the incidence of, and/or preventing an ischemic event in a patient receiving PCI comprising administering to the patient a pharmaceutical composition comprising cangrelor.

PCI may include, but is not limited to, balloon angioplasty, stent implantation, rotational or laser atherectomy, and/or brachytherapy. In the case where a stent is implanted, the stent may be, but is not limited to, a metal bare stent, a drug eluting stent, an absorbable stent, etc., as known in the art. Time, duration and route of administration of pharmaceutical compositions

The methods of the invention comprise administering the pharmaceutical composition before, during and/or after PCI. Administration may continue for a short period of time, such as less than about 1 hour, or may be 1 hour or more. In some embodiments, administration may continue for at least the duration of PCI. In other embodiments, administration may continue after PCI has ended. In certain embodiments, administration may continue for at least about 2 hours or the duration of PCI surgery, whichever is longer. In an additional embodiment, administration may continue for up to about 4 hours, or for about 4 hours or more.

A method may comprise multiple administrations of the pharmaceutical composition before, during and/or after PCI. For example, the pharmaceutical composition may be administered a short time before PCI and then once again after PCI has begun.

In certain embodiments, the method may comprise periodically administering the pharmaceutical composition after PCI has concluded. For example, the pharmaceutical composition may be administered 1,2, 3 or more times daily, 1 time every 2 days, 1 time every 3 days, etc. after PCI for weeks, months or even years, particularly if PCI involves stent grafting.

In additional embodiments, the method may comprise administering the pharmaceutical composition once the ischemic event is confirmed or diagnosed, or upon the onset of symptoms of the ischemic event. For example, the pharmaceutical composition may be administered if symptoms of myocardial infarction are observed. The pharmaceutical composition may be administered within a short time of onset of symptoms of the ischemic event. The short time may be from about 1 or 2 minutes to about 1 or 2 hours.

In some embodiments, the method may comprise administering the pharmaceutical composition as a prophylaxis of an ischemic event such as myocardial infarction. Patients suitable for such prevention include any patient suspected of having early symptoms of an ischemic event or a disease condition that may result in an ischemic event for which a pharmaceutical composition of the invention is effective. The pharmaceutical composition may be administered to the patient within a short time period of detection of early or incipient symptoms of the ischemic event.

The invention may also include the administration of the agent simultaneously or sequentially (before or after) with at least one additional therapeutic agentA pharmaceutical composition is provided. The additional therapeutic agent may be, for example, P2Y ₁₂ Receptor inhibitors such as oral P2Y ₁₂ -receptor inhibitors, glycoprotein IIb/IIIa inhibitors or aspirin.

Simultaneous or sequential administration of P2Y with said pharmaceutical composition ₁₂ Receptor inhibitors such as oral P2Y ₁₂ Receptor inhibitors can lead to (a) a reduction in the incidence of ischemic events; (b) inhibiting platelet aggregation; (c) inhibiting platelet activity; (d) attenuating the increase in platelet activity following termination of administration of the pharmaceutical composition; and/or (e) attenuating the increase in platelet aggregation after termination of administration of the pharmaceutical composition.

In addition, P2Y is administered simultaneously or sequentially with the pharmaceutical composition in patients receiving PCI ₁₂ Receptor inhibitors such as oral P2Y ₁₂ Receptor inhibitors may also transition the patient to treatment with P2Y ₁₂ Long-term or maintenance treatment of receptor inhibitors.

Wherein P2Y is administered concurrently with the administration of the pharmaceutical composition ₁₂ In the embodiment of the receptor inhibitor, P2Y ₁₂ The receptor inhibitor may be administered during the administration of a cangrelor bolus or during the administration of a cangrelor infusion. In certain embodiments, P2Y is administered within the first hour of a cangrelor infusion, such as 30 minutes (i.e., 0.5hr) after the infusion begins ₁₂ -a receptor inhibitor. In some embodiments, P2Y is administered within the second hour of the cangrelor infusion, such as 75 minutes (i.e., 1.25hr) after the infusion begins ₁₂ -a receptor inhibitor.

In certain embodiments, P2Y ₁₂ Receptor inhibitors such as oral P2Y ₁₂ The receptor inhibitor may be administered as an initial dose followed by one or more subsequent doses. The one or more subsequent doses may comprise higher, lower or the same amount of P2Y as compared to the initial dose ₁₂ -a receptor inhibitor.

P2Y ₁₂ The receptor inhibitor may be clopidogrel. In a preferred embodiment, an initial dose of 600mg of clopidogrel is administered immediately after termination of administration of the pharmaceutical composition comprising cangrelor.

P2Y ₁₂ The receptor inhibitor may be ticagrelor. In a preferred embodiment, a 180mg initial dose of ticagrelor is administered during or immediately after termination of administration of the pharmaceutical composition comprising cangrelor. One or more subsequent doses may be administered after the initial dose. The one or more subsequent doses may comprise about 90mg ticagrelor.

Furthermore, P2Y ₁₂ The receptor inhibitor may be prasugrel. In a preferred embodiment, an initial dose of 60mg of prasugrel is administered immediately after termination of the pharmaceutical composition comprising cangrelor.

In certain embodiments, P2Y is administered orally ₁₂ The treatment can be administered prior to administration of the pharmaceutical composition comprising cangrelor. Such administration may not diminish the effect of cangrelor. The oral administration of P2Y ₁₂ The treatment may be selected from clopidogrel, ticagrelor and prasugrel.

Routes of administration for the methods of the invention include, for example, oral, sublingual, intranasal, intraocular, rectal, transdermal, mucosal, topical or parenteral administration. Parenteral modes of administration include, but are not limited to, intradermal, subcutaneous (s.c., s.q., sub-Q, Hypo), intramuscular (i.m.), intravenous (i.v.), intraperitoneal (i.p.), intraarterial, intramedullary (intramedulary), intracardiac, intraarticular (joints), intrasynovial (joint fluid regions), intracranial, intraspinal and intrathecal (spinal fluid). Any known device useful for parenteral injection or infusion of pharmaceutical preparations may be used in the methods of the invention. In interesting aspects and embodiments of the invention, the administration is by parenteral administration, preferably intravenous administration, or oral administration.

When administered intravenously, the pharmaceutical composition comprising cangrelor can be administered as a bolus, as a continuous infusion, or as a bolus followed by a continuous infusion. For example, the pharmaceutical composition may be administered as a bolus prior to PCI and may be administered as a continuous infusion during PCI.

When the pharmaceutical composition comprising cangrelor is administered as a bolus, it is administered within a short period of time, such as 2 minutes or less, or 1 minute or less.

The dosage of cangrelor in the pharmaceutical compositions administered in the methods of the invention can vary depending on the intended goal of the method (treatment, reduction of occurrence, and/or prevention), the physical characteristics of the patient, the importance of the ischemic event, the presence of relevant or irrelevant medical conditions, the composition of the formulation, and the manner in which the drug is administered to the patient. In some embodiments, the dosage for a given patient may be set at the discretion of the attending physician.

When administered as a bolus, a dose of about 5 to about 100 μ g/kg cangrelor is administered, such as about 20 to about 40 μ g/kg cangrelor or about 30 μ g/kg cangrelor. When administered as a continuous infusion, cangrelor can be administered at about 0.1 to about 30 μ g/kg/min, e.g., about 1 to about 10 μ g/kg/min or about 4 μ g/kg/min. In some embodiments, the dosage may be different in the time before, during and after PCI.

In certain embodiments, the methods of the invention comprise administering a bolus of about 30 μ g/kg cangrelor followed by an infusion of about 4 μ g/kg/min cangrelor.

When the pharmaceutical composition is administered orally, a dose of about 0.5 to about 100mg/kg cangrelor or about 5 to about 30mg/kg cangrelor is administered daily. Oral administration may be once daily or multiple times daily.

In certain embodiments of the invention, an additional therapeutic agent is administered in addition to the pharmaceutical composition comprising cangrelor. When the additional therapeutic agent comprises clopidogrel, it can be administered orally at a dose of about 75mg to about 600mg clopidogrel.

Patient's health

As used herein, a "patient" to which the methods of the invention may be applied refers to an animal, preferably a human. Such patients may have ischemic events such as stent thrombosis, myocardial infarction, IDR, or death.

In view of the fact that patients to whom some methods of the present invention are administered have a basic health condition that requires PCI, those skilled in the art will appreciate that patients may have various additional physical characteristics associated with such basic health condition. For example, in each embodiment of the invention, the patient may have a disease condition selected from STEMI, NSTEMI, stable angina, unstable angina, and acute coronary syndrome. The patient may be of any age, sex or weight. The patient may have received different therapeutic agents, such as a perioperative glycoprotein IIb/IIIa inhibitor, a perioperative unfractionated heparin (UFH), a perioperative Low Molecular Weight Heparin (LMWH), a perioperative bivalirudin, or a perioperative clopidogrel.

To further characterize the patients to whom the methods of the invention can be administered, it is noted that the patients may have had a stroke, or may have had diabetes, hypertension, hyperlipidemia, myocardial infarction, or may have a family history of Coronary Artery Disease (CAD). The patient may have undergone Percutaneous Transluminal Coronary Angioplasty (PTCA), PCI, or Coronary Artery Bypass Graft (CABG). The patient may suffer from congestive heart failure, Peripheral Arterial Disease (PAD), or stent thrombosis in more than one artery or vein. Moreover, the patient may be on perioperative drug therapy, such as clopidogrel, bivalirudin, unfractionated heparin, low molecular weight heparin, fondaparinux or aspirin.

Results of the method

Each of the methods recited in the present invention may include additional steps for measuring the effectiveness of administering a pharmaceutical composition comprising cangrelor, including the time, duration and route of administration of the pharmaceutical composition. The measurement may include the effectiveness of administering any additional therapeutic agents. In one example, this additional step may be performed about 0.5 to about 24 hours after the administration is complete. Features that are representative of effectiveness include, for example, an increase in lumen diameter within the stent, a decrease in stent thrombus size, and a decrease in the occurrence of myocardial infarction.

Transition from PCI dosing regimen to bridge dosing regimen and from bridge dosing regimen to PCI agent Dosing regimens

One aspect of the invention is a method of transitioning a patient from administration of cangrelor during PCI to administration of cangrelor in preparation for surgery, or a method of transitioning a patient from administration of cangrelor in preparation for surgery to administration of cangrelor during PCI. Another aspect of the present invention is a slaveMethods of maintaining reduced platelet activity in patients who have transitioned from administration of cangrelor in the PCI period to administration of cangrelor in preparation for surgery, or in patients who have transitioned from administration of cangrelor in preparation for surgery to administration of cangrelor in the PCI period. Another aspect of the invention is a method of maintaining P2Y in a patient who has transitioned from administering cangrelor during PCI to administering cangrelor in preparation for surgery or who has transitioned from administering cangrelor in preparation for surgery to administering cangrelor during PCI ₁₂ A method of inhibition.

The reason that a patient may have to transition from administration of cangrelor during PCI to administration of cangrelor in preparation for surgery, or vice versa, may vary. For example, when a patient is administered cangrelor during PCI, surgery may be necessary due to, for example, new information collected during PCI or complications arising from the PCI surgery itself. On the other hand, a patient administered cangrelor during a preparatory surgery may have to receive PCI, for example, upon discovering that the patient requires angioplasty or stenting immediately. In each of these cases, the patient must change from one dosing regimen of cangrelor to a different dosing regimen.

Transitioning from administration of cangrelor during PCI to administration of cangrelor in preparation for surgery can be performed by administering a PCI dosing regimen, terminating a PCI dosing regimen, and administering a bridge dosing regimen. Transitioning from the pre-operative to PCI administration of cangrelor can be performed by administering a bridge dosing regimen, terminating the bridge dosing regimen, and administering a PCI dosing regimen. "PCI dosing regimen" refers to the dose of cangrelor that a patient receives while undergoing PCI. By "bridge dosing regimen" is meant a "bridge" period in preparation for surgery, i.e., termination of oral administration of P2Y ₁₂ The time period between inhibitor and surgery, the patient received a dose of cangrelor.

The PCI dosing regimen comprises intravenously administering a continuous infusion of cangrelor at a rate of about 3 to about 10 μ g/kg/min or about 4 μ g/kg/min. Continuous infusion may be accompanied by intravenous administration of a bolus. The bolus may comprise about 10 to about 100 μ g/kg cangrelor, such as about 20 to about 40 μ g/kg cangrelor or about 30 μ g/kg cangrelor. The bolus may be administered rapidly, e.g., in less than about 2 minutes, or less than about 1 minute. Preferably, administration of the continuous infusion is started immediately after administration of the bolus.

The bridge dosing regimen comprises intravenously administering a continuous infusion of cangrelor at a rate of about 0.1 to about 2 μ g/kg/min or about 0.75 μ g/kg/min.

Cangrelor can be administered in a pharmaceutical composition. The pharmaceutical composition may comprise 200 μ g/mL cangrelor. The pharmaceutical composition may also comprise 0.9% sodium chloride injection USP or 5% glucose injection, USP.

In embodiments in which the patient transitions from administration of cangrelor during PCI to administration of cangrelor in preparation for surgery, termination of the dosing regimen for PCI administration may occur at any time during the continuous infusion of PCI. The bridge dosing regimen may be performed as soon as possible after termination of the PCI dosing regimen. In some embodiments, terminating the administration of the PCI dosing regimen and administering the bridge dosing regimen may be accomplished simultaneously by decreasing the PCI continuous infusion rate to the bridge continuous infusion rate. The bridge dosing regimen may be terminated at least about 1 hour prior to administration of anesthesia for surgery. In addition, the bridge dosing regimen may be terminated no more than about 7 days after the start.

In embodiments in which the patient transitions from administration of cangrelor in preparation for surgery to administration of cangrelor during the PCI period, termination of the bridge dosing regimen may occur at any time during the bridge continuous infusion. The PCI dosing regimen may be administered as soon as possible after termination of the bridge dosing regimen. In some embodiments, terminating the bridge dosing regimen and administering the PCI dosing regimen may be accomplished simultaneously by increasing the bridge continuous infusion rate to the PCI continuous infusion rate. If the PCI dosing regimen comprises a bolus administration, the bolus may be administered immediately before or after increasing to the PCI continuous infusion rate. Administration of continuous infusion of cangrelor in a PCI dosing regimen can continue for a longer period of time: (a) at least 2 hours or (b) the duration of the PCI. The continuous infusion may last for a total duration of about 4 hours.

Can be used for treating, reducing the incidence of and/or preventing ischemic events Pharmaceutical composition

One aspect of the invention relates to a pharmaceutical composition useful for treating, reducing the occurrence of, and/or preventing an ischemic event in a patient receiving PCI. The pharmaceutical composition comprises cangrelor and may further comprise one or more pharmaceutically acceptable excipients. The pharmaceutical composition may be administered according to any of the methods of the invention described above.

Pharmaceutically acceptable excipients

These pharmaceutical compositions may comprise one or more pharmaceutically acceptable excipients including, but not limited to, carriers, diluents, stabilizers, solubilizers, surfactants, buffers, antioxidants, preservatives, tonicity agents, bulking agents, lubricants, emulsifiers, suspending or viscosity agents, fillers, disintegrants, binders, wetting agents, lubricants, antibacterial agents, chelating agents, sweeteners, flavoring agents, coloring agents, dosing aids, and combinations thereof. Specific excipients include, but are not limited to, gelatin, lactose, sucrose, glucose, microcrystalline cellulose, kaolin, mannitol, sorbitol, dicalcium phosphate, sodium chloride, alginic acid, croscarmellose sodium, sodium starch glycolate, glycerol, ethanol, propylene glycol, polysorbate 80 (Tween-80) ^TM ) Polyethylene glycols 300 and 400(PEG 300 and 400), pegylated castor oil (e.g., Cremophor EL), poloxamers 407 and 188, cyclodextrins or cyclodextrin derivatives (including HPCD ((2-hydroxypropyl) -cyclodextrin) and (2-hydroxyethyl) -cyclodextrin), hydrophilic and hydrophobic carriers, and combinations thereof. Hydrophobic carriers include, but are not limited to, fat emulsions, lipids, pegylated phospholipids, polymeric matrices, biocompatible polymers, lipid spheres (lipospheres), vesicles, particles, and liposomes. In certain embodiments, the pharmaceutical composition may comprise a polyol such asSorbitol, lactose, sucrose, inositol, or trehalose.

The pharmaceutical compositions of the present invention may be formulated for their route of administration to a patient, which includes solids, liquids and suspensions. For example, if the pharmaceutical composition is formulated for IV administration, the pharmaceutical composition may comprise an intravenous fluid including, but not limited to, water for injection (WFI), normal saline, 0.9% NaCl, phosphate buffered saline, 5% glucose in water, and 0.002% polysorbate 80 or Ringer's in water ^TM And (3) solution. Such compositions may comprise cangrelor in an amount of about 200 μ g/mL. If the pharmaceutical composition is formulated for intramuscular administration, the pharmaceutical composition may comprise intravenous fluids including, but not limited to, WFI, physiological saline, 0.9% NaCl, phosphate buffered saline, and 5% glucose in water.

If a pharmaceutical composition is formulated for oral administration, it may contain excipients including, but not limited to, diluents (e.g., sodium and calcium carbonate, phosphate and phosphate, and lactose), binders (e.g., acacia, starch, gelatin, sucrose, polyvinylpyrrolidone (povidone), sorbitol, tragacanth, methylcellulose, sodium carboxymethylcellulose, hydroxypropylmethylcellulose, and ethylcellulose), fillers (e.g., calcium phosphate, glycine, lactose, corn starch, sorbitol, or sucrose), humectants, lubricants (e.g., metal stearates, stearic acid, polyethylene glycol, waxes, oils, silicon dioxide, and colloidal silicon dioxide, silicone oil, or talc), disintegrants (e.g., potato starch, corn starch, and corn starch), flavoring agents (e.g., peppermint, corn starch, and talc), flavoring agents, Wintergreen oil, fruit flavors, bubble gum, etc.) and colorants. Excipients may also include a coating such as glyceryl monostearate or glyceryl distearate, to delay absorption in the gastrointestinal tract. For oral use, the pharmaceutical compositions may be prepared as tablets, capsules, suspensions or liquid syrups or elixirs, wafers and the like.

Preparation of pharmaceutical composition

The pharmaceutical compositions of the invention may be prepared by mixing cangrelor with one or more pharmaceutically acceptable excipients. Methods of mixing and devices useful for mixing are known in the art.

In certain embodiments, cangrelor and one or more pharmaceutically acceptable excipients are dissolved and then mixed. The resulting mixture may be dried, such as by freeze-drying, to form a solid pharmaceutical composition, or the resulting mixture may remain in liquid form as a liquid pharmaceutical composition. In some embodiments, the solid pharmaceutical composition may be dissolved in an intravenous fluid prior to administration, for example, as a bolus or infusion,

in some embodiments, the pharmaceutical composition is prepared by dissolving and mixing cangrelor, mannitol, sorbitol, and optionally sodium hydroxide, and then freeze-drying the mixture. Prior to administration, the freeze-dried mixture is dissolved in intravenous fluid such as WFI or normal saline.

The invention will now be further described by the following non-limiting examples, which further illustrate the invention; such examples are not intended to limit the scope of the invention, and they should not be construed as limiting the scope of the invention.

Examples

Example 1: intravenous platelet blocking with cangrelor versus placebo during percutaneous coronary intervention

In this example, the efficacy of cangrelor compared to placebo was tested when administered to patients during Percutaneous Coronary Intervention (PCI).

Patients were recruited in 218 sites in 18 countries from 10 months 2006 to 5 months 2009. Patients were randomized into double-blind, placebo-controlled, dual-mimic designs to receive either (i) placebo boluses and infusions or (ii) cangrelor 30 μ g/kg boluses and 4 μ g/kg/min infusions for the duration of PCI with a minimum infusion duration of 2 hours and a maximum of 4 hours. Patients in the placebo group tested received 600mg of clopidogrel at the end of surgery, while patients in the cangrelor group received 600mg of clopidogrel after the end of the cangrelor infusion (fig. 1).

Inclusion criteria for the assay were as follows: the age is more than or equal to 18 years old; diagnosing atherosclerotic lesions with coronary angiography showing PCI appropriate with or without stent implantation; and evidence of non-ST-segment elevation myocardial infarction or unstable angina. Stable angina was initially allowed at the start of the trial before protocol correction. Diagnosis of non-ST-fragment elevated myocardial infarction requires troponin I or T above the upper normal limit within 24 hours of random sampling (or creatine kinase-myocardial band isozyme [ CK-MB ]) above the upper normal limit if troponin results are not available at that time). The diagnosis of unstable angina requires ischemic chest discomfort and a change in electrocardiogram with onset at rest and for more than or equal to 10 minutes within 24 hours prior to random sampling; also required are age ≥ 65 years and/or diabetes.

Exclusion criteria included the following: a second phase of planned fractionated PCI surgery was performed earlier with thienopyridine in the past 7 days, within < 30 days after the first PCI, scheduled hospital admissions <12 hours after PCI, ST-segment elevated myocardial infarction within 48 hours of random sampling, known or suspected pregnancy, lactating women, increased risk of bleeding (ischemic stroke or any previous hemorrhagic stroke in the past year), intracranial tumors, arteriovenous malformations, intracranial aneurysms, recent (<1 month) trauma or major surgery (including coronary artery bypass graft), warfarin being currently used, active bleeding, known international normalized ratio >1.5, past or present bleeding disorders, platelet counts <100,000/μ L, severe hypertension (systolic pressure >180mm Hg or diastolic pressure >110mm Hg), fibrinolytic therapy or glycoprotein IIb/IIIa inhibitors were used 12 hours prior to random sampling.

The primary efficacy endpoint was a combination of death at 48 hours, myocardial infarction, or ischemia-driven revascularization. The primary analysis was performed on the modified intended treatment population. Confirmatory analysis was performed on the intended treatment population. Secondary endpoints included individual incidences of death at 48 hours, myocardial infarction, new Q-wave myocardial infarction, ischemia-driven revascularization, abrupt vessel closure, or stroke. Mortality at 30 days and 1 year was also recorded. The clinical event committee adjudges myocardial infarction, Q-wave myocardial infarction, ischemia-driven revascularization, stent thrombosis, and stroke (ischemic or hemorrhagic). The definition of stent thrombosis is similar to the Academic Research Consortium definition of definitive stent thrombosis. After reviewing the pre-set analysis, two exploratory endpoints were detected that were less dependent on perioperative biomarkers. Exploratory endpoints consisting of pre-set and adjudicated endpoints are a combination of death, Q-wave myocardial infarction or ischemia driven revascularization and a combination of death, Q-wave myocardial infarction or stent thrombosis. Bleeding and adverse events were compared for 48 hours.

Statistical analysis

All efficacy analyses were performed on a modified intended treatment population defined as all randomized patients receiving at least one dose of study drug and conducted exponential PCI. All safety-related analyses were performed on a safe population that included all patients who received at least one dose of the prescribed study drug. Patients in the safety analysis were assigned to treatment groups based on actual received treatment rather than randomization. A full disclosure of the results of the intended analysis is also presented. All analytical tests were two-tailed, using a significance level of 0.05. The primary endpoint comparison between cangrelor and placebo was performed by calculating the Odds Ratio (OR) with 95% Confidence Interval (CI) using logistic regression. Logistic regression was also used to analyze most of the remaining secondary endpoints. The trial had a 25% reduction in the primary endpoint of 85% capacity detection, presenting a 7.7% event rate in the placebo group, with a planned sample size of 6400 patients.

A total of 5362 patients were included in the intent-to-treat population; of these patients, 5301 formed the main modified analysis population for intended treatment (fig. 2). 61 patients were excluded because they did not receive study medication or did PCI. The baseline characteristics matched well in both groups (table 1).

Table 1: baseline characteristics of ITT, MITT and safe populations

Variables are presented as medians (25th,75th) unless otherwise noted. CABG for coronary artery bypass; CAD, coronary artery disease; GP, glycoprotein; HF, heart failure; ITT, intent to treat; IV, intravenous; LMWH, low molecular weight heparin; MI, myocardial infarction; MITT, modified intent to treat; NSTEMI, non-ST-fragment elevation myocardial infarction; PAD, peripheral arterial disease; PCI, percutaneous coronary intervention; PTCA, percutaneous transluminal coronary angioplasty; TIA, transient ischemic attack; UFH, unfractionated heparin.

Most patients register for non-ST-segment elevation myocardial infarction (59.8%). Unfractionated heparin is the most commonly used antithrombin during PCI (63.9%), while glycoprotein IIb/IIIa inhibitors are rarely used (9.2%). Drug eluting stents were used less often than metal bare stents (38.7% vs 56.9%). The time from admission to PCI was short (median of 7.9 hours [3.3,24.1 ]). The primary endpoint (OR 0.87, 95% CI 0.71-1.07; P ═ 0.17) appeared in 7.0% of patients receiving cangrelor and 8.0% of patients receiving placebo (table 2, fig. 3A).

Table 2: 48-hour endpoint for MITT, ITT and safe populations

Variables are presented as quantities (%) unless otherwise indicated. CI represents a confidence interval; IDR, ischemia-driven revascularization; ITT, intent to treat; MI, myocardial infarction; MITT, modified intent to treat; OR, ratio of ratios.

There were no significant differences in total myocardial infarction, Q-wave myocardial infarction, or ischemia-driven revascularization (table 2). The incidence of stent thrombosis with cangrelor was significantly lower (0.2% vs. 0.6% [ OR 0.31, 95% CI 0.11-0.85; P ═ 0.022) (fig. 3B). In the cangrelor group, mortality was significantly lower at 48 hours (0.2% vs 0.7% [ OR 0.33, 95% CI 0.13-0.83; P ═ 0.019]), and this difference was no longer significant over 30 days (table 3, fig. 3C).

Table 3: 30-day endpoints of ITT, MITT and the safe population

Variables are presented as quantities (%) unless otherwise indicated. CI denotes the confidence interval; IDR, ischemia-driven revascularization; ITT, intent to treat; MI, myocardial infarction; MITT, modified intent to treat; OR, ratio of ratios.

In a subset of 1659 patients enrolled without baseline troponin elevations, the primary efficacy endpoint was reduced from 7.2% to 4.6% with cangrelor (OR 0.62, 95% CI 0.41, 0.95; P ═ 0.0266). Therefore, exploratory analysis was performed in the overall study population, detecting the following two clinical endpoints: death, Q-wave myocardial infarction or stent thrombosis; and death, Q-wave myocardial infarction, or ischemia-driven revascularization. These endpoints are significantly reduced, which supports cangrelor.

The incidence of severe or mild Thrombolysis (TIMI) or of generalized use of streptokinase and tissue plasminogen activator (GUSTO) occluding coronary arteries in myocardial infarction(s) severe or moderate bleeding did not differ significantly between groups, but the incidence of acute catheter and emergency intervention strategy (ACUITY) severe and mild bleeding as well as GUSTO mild bleeding was significantly higher for cangrelor (table 4).

Table 4: 48-hour bleeding episodes in a safe population

Variables are presented as quantities (%) unless otherwise indicated. The bleeding options under each criteria are not mutually exclusive. For example, if there are more than 1 bleeding point, the patient may have clinically significant bleeding and mild bleeding based on the ACUITY criteria. For each standard level, each patient was counted only once, regardless of the number of bleeding points identified under each standard. Bleeding as listed herein includes CABG related bleeding.

The difference in ACUITY severe bleeding is due to excessive groin hematoma, rather than the more severe bleeding form. There was no significant difference in red blood cell infusion rate (cangrelor 0.9% vs placebo 0.6%; P ═ 0.12). Notably, patients with higher risk of bleeding, such as the elderly or those with prior stroke or transient ischemic attack, did not have higher transfusion rates with cangrelor (fig. 4). There was no difference in the rate of arrhythmia (2.3% vs 2.4%; P ═ 0.7664) and the incidence of dyspnea was higher for cangrelor (1.4% [37] vs 0.5% [14 ]; P ═ 0.0019).

The results demonstrate that important pre-set endpoints including stent thrombosis and death are significantly reduced by cangrelor.

Example 2: inhibition of platelets with cangrelor in patients undergoing percutaneous coronary intervention with acute coronary syndrome

In this example, the efficacy of cangrelor on clopidogrel was tested when administered to patients prior to Percutaneous Coronary Intervention (PCI).

Patients are eligible for enrollment and are scheduled to receive PCI if they have stable angina, unstable angina, or non-ST-segment elevation (NSTE) MI with obstructive coronary disease. An additional 1000 patients with STEMI who planned direct PCI were also eligible. The protocol revision released in 5 months 2007 requires patients to have a clear characterization of acute coronary syndrome (STEMI with planned direct PCI or NSTE acute coronary syndrome with positive cardiac biomarkers or chest pain with electrocardiographic changes in patients aged 65 or older or with diabetes). Patients may not receive fibrinolysis or glycoprotein IIb/IIIa inhibitors within the previous 12 hours, or clopidogrel >75 mg/day within the previous 5 days.

Patients were randomized to cangrelor or clopidogrel using the IVRS system in a 1:1 double-blind, double-simulation manner. All patients received 30 μ g/kg intravenous bolus cangrelor or placebo followed by 4 μ g/kg/min intravenous infusion (figure 5). Infusion was initiated within 30 minutes prior to PCI and continued for at least 2 hours or until the end of the procedure, whichever was longer. Infusion may continue for 4 hours at the discretion of the treating physician. Patients received 600mg of encapsulated clopidogrel (4 capsules 150 mg) or placebo at the time of infusion. To allow for the transition from intravenous cangrelor to oral clopidogrel, patients took an additional 4 capsules (clopidogrel for cangrelor patients and placebo for clopidogrel patients) at the time of study drug infusion cessation. The duration of clopidogrel per day after surgery is decided by the treating physician, but no additional clopidogrel other than the prescribed study drug is allowed until the day after surgery.

All patients received aspirin 75-325mg per local site criteria. The surgical use of a secondary anticoagulant (unfractionated heparin, low molecular weight heparin, bivalirudin, or fondaparinux) and glycoprotein IIb/IIIa inhibitor is decided by the treating physician.

The primary efficacy endpoint was a 48-hour combination of all-cause death, MI, or ischemia-driven revascularization. The pre-established secondary efficacy endpoints included a combination of deaths or MIs at 48 hours and 30 days; a combination of death, MI, or ischemia-driven revascularization at 30 days; components at combined endpoints of 48 days and 30 days; stroke at 48 hours; abrupt closure, threatened abrupt closure, need for emergency coronary bypass, or unsuccessful surgery during index PCI; acute (24 hours) and 48 hours stent thrombosis; and all-cause death at 6 months and 1 year.

The incidence of MI and ischemia-driven revascularization until 30 days post-surgery was evaluated. Ischemia-driven revascularization is defined as the symptom of myocardial ischemia that results in urgent (within 24 hours of the last ischemia) revascularization, which must occur after the end of the procedure (i.e., guidewire removal). New electrocardiographic changes, acute pulmonary edema, ventricular arrhythmia or hemodynamic instability may also constitute evidence of ischemia.

MI is defined as two adjacent electrocardiogram leads of Creatine Kinase (CK) and CK-MB or a new Q wave in elevation (duration >0.03 seconds), including a 3-fold local ceiling or normal rise of CK-MB ≧ 3, and when the biomarker is elevated an additional 50% above baseline before PCI. A baseline troponin measurement is required for patients receiving urgent PCI. Measurements of CK-MB were obtained at 2, 10, 17 and 24 hours after PCI. Stent thrombosis was defined using the Academic Research Consortium standard (Cutlip d.e.et al, Circulation 115: 2344-51 (2007)).

Bleeding was assessed for up to 48 hours using clinical and laboratory definitions. Several definitions of bleeding are used to fully disclose cangrelor-related bleeding risks: (1) the general use of streptokinase and tissue plasminogen activator (GUSTO) standards for occlusion of coronary arteries (The GUSTO investigators. NEngl J Med 329: 673-82 (1993); mild, moderate or severe/life threatening based on transfusion use and The presence/absence of hypohemodynamics); (2) the Thrombolysis (TIMI) criteria in myocardial infarction (Chesebro J.H.et al, Circulation 76: 142-54 (1987); based on clinical and laboratory findings, minor or severe bleeding); (3) acute catheter and emergency intervention strategy (ACUITY) criteria (Stone g.w.et al, N Engl J Med 355: 2203-16 (2006); using detailed clinical evaluation, hemoglobin changes, hematomas >5cm, and requiring blood transfusions). Researchers reported adverse and severe adverse events according to the International Conference on harmony identification (International Conference on harmony (ICH) identification documents u.s.food and Drug Administration Web site) (10/8 th visit 2009, FDA website opened at "www." and ending at "FDA. gov/regulatory information/identifications/ucm 122049. htm")).

The independent clinical event committee reviewed and adjudged suspected MI, ischemia-driven revascularization, stent thrombosis, and stroke, with little knowledge of the study drug (Mahaffey k.w.et al, Am Heart J143: 242-8 (2002)).

Determination of perioperative MI is challenging when the majority of patients have elevated biomarkers and a single baseline sample. After completion and review of the preliminary analysis, additional post-hoc combinations were performed to better understand the potential impact of drugs on perioperative outcomes, less dependent on biomarkers (e.g., death, stent thrombosis, and Q-wave MI).

Sample size was based on the predicted combined incidence of all-cause death, MI, and ischemia-driven revascularization at 48 hours. Because there is no prior information about the use of cangrelor in the setup of STEMI and direct PCI, and given the challenge of measuring re-infarctions at the early stage of STEMI, the primary efficacy endpoint excluded these patients in the analysis, although they were included in the safety analysis. The rate of combined events was estimated to be 7% in the control clopidogrel group. The test was designed as a high efficacy test to demonstrate the superiority of cangrelor over 600mg of clopidogrel. Assuming a 22% risk reduction, a sample size of 8000 patients would provide about 82% capacity with an alpha level of 0.05. The program included up to 1000 patients with STEMI, increasing the sample size to 9000 patients.

The primary efficacy analysis was determined in a modified intent-to-treat (mITT) population defined as all randomized patients receiving at least one dose of study drug and performing exponential PCI (excluding STEMI population). The safety population consisted of all randomized patients who received any study drug. Patients in the safety analysis were assigned to treatment groups based on treatment received rather than randomization. ITT analysis with or without STEMI populations was reported.

All analytical tests were two-tailed, using a significance level of 0.05. The primary endpoint comparison between cangrelor and placebo was performed by calculating the Odds Ratio (OR) with 95% Confidence Interval (CI) using logistic regression. Logistic regression was used to analyze most of the remaining secondary endpoints. The continuous variables are summarized by the median and quartile ranges. The classification variables are summarized by frequency and percentage. In secondary efficacy analysis, no attempt was made to adjust P values for diversity issues. These analyses are considered exploratory and generate assumptions.

At the end of the study, 98% (n-8877) of the expected 9000 patients had been enrolled at 268 sites in 14 countries. For the 48-hour and 30-day endpoints, the vital status follow-up was 99.7% and 98.6% complete, respectively.

The baseline demographics for the ITT population are shown in table 5. Baseline demographics for the MITT and security populations are shown in tables 6 and 7.

Table 5: baseline characteristics of the ITT population

Variables are presented as median (25th,75th) unless otherwise stated. CABG for coronary artery bypass; CAD, coronary artery disease; GP, glycoprotein; HF, heart failure; ITT, intent to treat; IV, intravenous; LMWH, low molecular weight heparin; MI, myocardial infarction; NSTEMI, non-ST-fragment elevation myocardial infarction; PAD, peripheral arterial disease; PCI, percutaneous coronary intervention; PTCA, percutaneous transluminal coronary angioplasty; STEMI, ST-fragment elevation myocardial infarction; TIA, transient ischemic attack; UFH, unfractionated heparin.

Table 6: MITT and MITT NSTEMI populations

Variables are presented as median (25th,75th) unless otherwise stated. CABG for coronary artery bypass; CAD, coronary artery disease; GP, glycoprotein; HF, heart failure; IV, intravenous; LMWH, low molecular weight heparin; MI, myocardial infarction; MITT, modified intent to treat; NSTEMI, non-ST-fragment elevation myocardial infarction; PAD, peripheral arterial disease; PCI, percutaneous coronary intervention; PTCA, percutaneous transluminal coronary angioplasty; STEMI, ST-fragment elevation myocardial infarction; TIA, transient ischemic attack; UFH, unfractionated heparin.

Table 7: safe group

Variables are presented as median (25th,75th) unless otherwise stated. CABG for coronary artery bypass; CAD, coronary artery disease; GP, glycoprotein; HF, heart failure; IV, intravenous; LMWH, low molecular weight heparin; MI, myocardial infarction; NSTEMI, non-ST-fragment elevation myocardial infarction; PAD, peripheral artery disease; PCI, percutaneous coronary intervention; PTCA, percutaneous transluminal coronary angioplasty; STEMI, ST-fragment elevation myocardial infarction; TIA, transient ischemic attack; UFH, unfractionated heparin.

There were no significant differences with respect to the baseline characteristics. The enrolled patients were a typical cohort of PCI of the same age, mostly male and had a median age of 62 years (54.0, 71.0). Diabetes was noted in 30.5% while hypertension or hyperlipidemia was present in most patients. Previous cardiac events included 24.7% MI and 41.1% revascularization (28.6% PCI, 12.5% bypass). Almost half (49%) of the enrolled patients had NSTEMI at baseline, while stable angina and unstable angina in 15.0% and 24.6%, respectively, were baseline diagnoses. The STEMI population included 996 (11.2%) patients.

During surgery, most patients (55.1%) received unfractionated heparin, and 29.9% received bivalirudin. 26.5% use glycoprotein IIb/IIIa, most of which received eptifibatide (75.0%). Almost all (98%) patients in the ITT population received study drug. The field was instructed to initiate PCI within 30 minutes of the clopidogrel capsule.

PCI was attempted in all patients except 161 patients (1.8%), 65 in the cangrelor group (1.5%) and 96 in the clopidogrel group (2.2%). The median duration of PCI was 0.4 hours (0.2,0.6) and the median time from admission to PCI was 6.3 hours (2.6, 23.7). Most procedures involve either single vessel or two vessel PCI (87.7% and 11.4%, respectively). Drug eluting stents were used for most interventions (59.1%), 37.6% using metal bare stents.

Cangrelor, in the main combination of all-cause death at 48 hours, MI OR ischemia driven revascularization, was equal to 600mg of clopidogrel (7.5% vs. 7.1%; OR 1.05, 95% CI 0.88, 1.24; P ═ 0.59) (table 8).

Table 8: 48-hour endpoint of MITT without STEMI population

The main efficacy combinations did not differ at day 30 (table 9). Fig. 6A and 6B show the primary endpoint OR data for key subgroups.

Table 9: 30-day end-points for ITT, MITT, and the safe population

Variables are presented as quantities (%), unless otherwise indicated. CI denotes the confidence interval; IDR, ischemia-driven revascularization; ITT, intent to treat; MI, myocardial infarction; MITT, modified intent to treat; OR, odds ratio; STEMI, ST-segment elevation myocardial infarction.

The 48-hour bleeding events observed in the safe population (including those with STEMI) are in table 10. The reported adverse events were comparable between groups (26.4% cangrelor, 25.7% clopidogrel) and were not common in both groups due to study drug termination of adverse events (0.5% in both groups). Severe adverse events occurred infrequently and were similar between groups (2.7% in both groups). Dyspnea was reported in 1.0% cangrelor patients compared to 0.4% clopidogrel patients (P ═ 0.001).

Table 10: 48-hour bleeding episodes in a safe population

Variables are presented as quantities (%) unless otherwise indicated. The bleeding options under each criteria are not mutually exclusive. For example, if there are more than 1 bleeding point, the patient may have clinically significant bleeding and mild bleeding based on the ACUITY criteria. For each standard level, one count is made per patient, regardless of the number of bleeding points identified under each standard.

The key secondary and combined exploratory (post-hoc) endpoints are shown in table 11.

Table 11: 48-hour endpoint for ITT, MITT and safety populations

Variables are presented as quantities (%) unless otherwise indicated. CI denotes the confidence interval; IDR, ischemia-driven revascularization; ITT, intent to treat; MI, myocardial infarction; MITT, modified intent to treat; OR, ratio; STEMI, ST-fragment elevation myocardial infarction.

A sub-study was conducted at 15 sites to evaluate platelet function during infusion and to evaluate whether administration of a cangrelor infusion prior to administration of clopidogrel 600mg had any effect on platelet inhibition by clopidogrel. Patients in the sub-study were asked to not receiveClopidogrel, and may not be inhibited by glycoprotein IIb/IIIa during surgery. By usingThe P2Y12 assay (Accumetrics, San Diego, CA) measures platelet function parameters. Samples were collected about 2 hours (cangrelor/placebo infusion period) and 10 hours or the next day after randomization prior to study drug administration.

FromThe median baseline P2Y12 response units (PRU) determined by P2Y12 was 335(264,384; n ═ 97) in the cangrelor group and 329(285.5,376.5; n ═ 100) in the clopidogrel group. Study drug infusionIn the meantime, the median PRU was significantly lower in the cangrelor group (93.5; 40.0,173.5; n ═ 64) compared to the contemporaneous clopidogrel group (277; 206.0,355.0; n ═ 74). The median PRU was 228(156.0,298.0; n ═ 87) in the cangrelor group and 206(135.0,274.0; n ═ 87) in the clopidogrel group, 12-24 hours after termination of the cangrelor infusion.

The percentage of individuals with less than 20% change in PRU between baseline and more than 10h after PCI was achieved with cangrelor + clopidogrel (32/84, 38.1%) compared to placebo + clopidogrel (21/83, 25.3%), but this was not statistically significant (difference: 12.79%, 95% CI: -1.18%, 26.77%; p ═ 0.076).

Example 3: comparison of cangrelor and clopidogrel standards for care therapy in patients in need of percutaneous coronary intervention

The efficacy and safety of cangrelor in a physiotherapy regimen compared to clopidogrel standard was tested in double-blind, placebo-controlled, double-simulated studies in patients with atherosclerosis who received PCI.

From 30 days 9/2010 to 3 days 10/2012, a total of 11,145 patients were randomized in 153 sites of 12 countries. Randomization was performed prior to PCI using an interactive voice response or Web-responsive system, layered according to location, baseline status (normal or abnormal, as defined by a combination of biomarker levels, electrocardiographic changes, and symptoms), and intended initial clopidogrel dose (600mg or 300 mg). Randomization patients were divided into two groups: cangrelor group and clopidogrel group. Administering to the patients assigned to the cangrelor group: (i) placebo capsules (clopidogrel capsules administered before or immediately after PCI to match those administered in the clopidogrel group); (ii) cangrelor bolus (30. mu.g/kg)/infusion (4. mu.g/kg/min); and (iii) a capsule containing 600mg of clopidogrel administered at the end of the infusion. Administration to patients assigned to the clopidogrel group: (i) clopidogrel capsules (300 mg or 600mg administered before or immediately after PCI, with the dosage and timing being at the discretion of the on-site investigator); (ii) placebo bolus/infusion (to match the cangrelor bolus/infusion administered in the cangrelor group); and (iii) a placebo capsule administered at the end of the infusion (to match the capsule containing 600mg of clopidogrel administered at the end of the infusion in the cangrelor group). Cangrelor or placebo infusion was administered for at least 2 hours or the duration of PCI surgery, whichever was longer. A summary of the study design is shown in figure 7.

This regimen requires aspirin (75-325mg) to be administered to all patients. This regimen also required a maintenance dose of clopidogrel (75mg) administered during the first 48 hours after randomization; thereafter, clopidogrel or another P2Y can be administered at the discretion of the investigator according to local guidelines ₁₂ And (3) an inhibitor. The choice of perioperative anticoagulant (bivalirudin, unfractionated heparin, low molecular weight heparin or fondaparinux) is also left to the discretion of the investigator. Glycoprotein IIb/IIIa inhibitors are allowed to treat new or persistent thrombosis, slow or no reflux, collateral damage, dissection or distal embolization only on rescue treatment during PCI. The field investigator determined the management of the arterial sheath.

Inclusion criteria for the trial were male or non-pregnant female, 18 years of age or older, with coronary atherosclerosis, and PCI required for stable angina, non-ST-segment elevation acute coronary syndrome, or ST-segment elevation myocardial infarction (STEMI). The patient is asked to provide written informed consent.

The primary exclusion criteria was to receive P2Y at any time 7 days prior to randomization ₁₂ Inhibitor or abciximab, and eptifibatide or tirofiban or fibrinolysis therapy 12 hours prior to randomization.

The primary efficacy endpoint was the combined rate of death from any cause, myocardial infarction, IDR and stent thrombosis in the modified intended treatment population (which included patients who actually underwent PCI and received the study drug) in 48 hours after randomization. The protocol provides that if more than 15% of patients receive a 300-mg initial dose of clopidogrel (compared to a 600-mg dose) at randomization, the primary analysis for initial dose adjustments is conducted except for baseline status. The key secondary endpoint was the incidence of stent thrombosis at 48 hours. This endpoint includes either definitive stent thrombosis as defined by Academic Research Consortium's standards, or intra-operative stent thrombosis evaluated in a group assignment concealed in the angiographic core laboratory (cardiac Research Foundation). Intra-stent thrombosis is defined as any new or worsening thrombus associated with stent surgery as evidenced by angiography. Death, myocardial infarction, IDR and stent thrombosis events occurring during the first 30 days after randomization were adjudicated by the Clinical event committee of Duke Clinical Research Institute. The criteria used by the clinical event committee to define myocardial infarction are provided in tables 12A and 12B. For PCI-independent myocardial infarction, the study followed the general definition of myocardial infarction, but the definition of PCI-related myocardial infarction was expanded.

Table 12A: baseline status evaluation and trigger logic

CKMB represents creatine kinase-myocardial band isozyme, ECG represents electrocardiogram, MI represents myocardial infarction, NSTE-ACS represents non-ST-segment elevated acute coronary syndrome, and STEMI represents ST-segment elevated myocardial infarction.

¹ Change in ECG: ST segment elevation/depression in at least 2 consecutive leads>0.1mV(>1 mm); a new LBBB; new Q wave (greater than 0.03 second). ECG acquisition after PCI: within 1 hour after PCI; and discharging in advance.

² Ischemic events were: require medical treatment or angina pectoris for a duration of 20min or more or an equivalent symptom. Ischemic symptoms determined by the treating physician include, but are not limited to, drug use (nitroglycerin, morphine, beta blockers, etc.) of weakness, shortness of breath, wheezing, fatigue, syncope, sweating, nausea/vomiting, abdominal pain, back pain, mandibular pain, palpitations, tachycardia, chest pain.

Table 12B: definition of PCI-related myocardial infarction

MI means myocardial infarction, CKMB means creatine kinase-myocardial band isozyme, NSTE-ACS means non-ST-segment elevated acute coronary syndrome, ULN means upper limit of normal, and PCI means percutaneous coronary intervention.

¹ CKMB acquisition after PCI: collected over 6 hours of 24 hours (a minimum of 3 samples are required). Core laboratory value precedence; hospital laboratories may be used if the core laboratory is not available (CKMB takes precedence, but troponin may be used).

Angiographic evidence of complications (assessed by the angiographic core laboratory):

new onset of vessel closure or damage as defined by TIMI 0/1 flow after baseline TIMI 2/3 flow (also referred to as acute closure or no regurgitation); or

TIMI 2 flow after the baseline TIMI 3 flow (also known as slow reflux); or alternatively

Sustained slow embolization; or

Continuous collateral closure of vessels with diameter greater than or equal to 2 mm; or

Intra-operative thrombotic events (IPTE): new or worsening thrombosis at any time during surgery. IPTE may occur as a stent-related or stent-independent complication or intra-operative stent thrombosis (IPST), a new or worsening thrombus associated with a stent, or a sudden closure due to thrombus formation. Abrupt closure due to non-thrombotic causes including major anatomy, perforation or other causes is not considered IPST. If the non-thrombotic cause of abrupt stent closure cannot be unambiguously determined, then the cause is IPST under consideration. IPST may exist as an acute thrombotic stent closure after stent implantation in a patient with a previously patented vessel, or as a new thrombus formation within or adjacent to the stent in a vessel where thrombus is not present or has been reduced or resolved prior to stent implantation.

³ Ischemic symptoms: require medical treatment or angina pectoris or equivalent symptoms lasting more than or equal to 20 min. Ischemic symptoms determined by the treating physician include, but are not limited to, weakness, shortness of breath, asthmaAnd (4) drugs for relieving, fatigue, syncope, sweating, nausea/vomiting, abdominal pain, backache, mandibular pain, palpitation, tachycardia, and chest pain (nitroglycerin, morphine, beta blocker, etc.).

⁴ Change in ECG: ST segment elevation/depression in at least 2 consecutive leads>0.1mV(>1 mm); a new LBBB; new Q wave (greater than 0.03 second). ECG acquisition after PCI: within 1 hour after PCI; and discharging in advance.

The primary safety endpoint was severe bleeding at 48 hours, not associated with coronary artery bypass graft surgery, according to the global use of open occlusion coronary strategy (GUSTO) standard. Several other definitions of bleeding also apply.

Based on previous studies, assuming a combined primary endpoint rate of 5.1% in the clopidogrel group and 3.9% in the cangrelor group, a 24.5% reduction in the odds ratio with cangrelor was demonstrated. It is estimated that about 10,900 patients need to be recruited for the study to have 85% capacity to detect this reduction. A double-sided total alpha level of 0.05 was used for all analyses. This study was adaptively designed with conditional capability calculations and potential to re-estimate sample size, if needed, after an interim analysis scheduled after 70% of patients were recruited.

The number and percentage of patients within each analysis population (modified intended treatment, intended treatment and safety) were summarized according to treatment group. The primary efficacy analysis of the combined endpoint rates dying from any cause, myocardial infarction, IDR or stent thrombosis (all events adjudged by the clinical event committee) within 48 hours after randomization was performed in the modified intended treatment population. The primary safety analysis was performed in a safety population that contained all patients randomized and receiving at least one dose of study drug; patients were classified according to the actual treatment received. All calculations and statistical analyses were performed using SAS software, version 9.2.

Of the 11,145 patients randomized, 203 did not have PCI or received study medication; thus, the modified intended treatment population contained 10,942 patients (fig. 8). The baseline characteristics were well balanced between the two groups. The characteristics of the patient and the procedure are shown in tables 13 and 14.

Table 13: modifying baseline and surgical characteristics of patients in the intent-to-treat population according to treatment group

Denominator excluded patients in which the study center reported status was unknown. There were no significant differences between the two groups except for the history of Coronary Artery Bypass Graft (CABG) (P0.01), previous myocardial infarction (P0.04), and peripheral artery disease (P0.02). NSTE-ACS means non-ST-segment elevated acute coronary syndrome, PCI percutaneous coronary intervention, PTCA percutaneous transluminal coronary angioplasty, STEMI ST-segment elevated myocardial infarction and TIA transient ischemic attack.

Ethnicity is self-reported.

A cardiac biomarker status is considered abnormal if at least one of the baseline troponin I or T levels obtained within 72 before randomization or after randomization but before the study drug began, as determined by the local laboratory, is greater than the upper limit of the normal range. The baseline MB portion of creatine kinase is used if baseline troponin levels are not available.

Table 14: additional baseline and surgical characteristics of the modified intent-to-treat population according to treatment group

Denominator excludes patients where the reported status is unknown. There were no significant differences between the two groups, except for the type of diabetes (p < 0.05).

CAD for coronary artery disease; IDDM for insulin-dependent diabetes; and MITT represents the modified intended treatment.

The results of the efficacy and safety endpoint analysis 48 hours after randomization are provided in tables 15, 16, and 17.

On the basis of a pre-established logistic regression analysis of baseline status (normal versus abnormal) and clopidogrel initial dose (600mg versus 300mg) adjustments, the primary combined efficacy endpoint rate at 48 hours of death from any cause, myocardial infarction, IDR or stent thrombosis was significantly lower in the cangrelor group than in the clopidogrel group (4.7% versus 5.9%; odds ratio, 0.78; 95% confidence interval [ CI ], 0.66-0.93; P ═ 0.005) (table 15). The results of the crude analyses were similar (odds ratio, 0.79; 95% CI, 0.67-0.93; P ═ 0.006). FIG. 9A shows a Kaplan-Meier estimate of the event occurrence time distribution for the primary endpoint. The number of events requiring treatment with cangrelor to prevent one primary endpoint was 84 (95% CI, 49-285).

The key secondary efficacy endpoint rate for stent thrombosis at 48 hours was also lower in the cangrelor group than in the clopidogrel group (0.8% to 1.4%; odds ratio, 0.62; 95% CI, 0.43-0.90; P ═ 0.01) (table 15). FIG. 9B shows a Kaplan-Meier estimate of the event occurrence time distribution for the key secondary endpoints.

The primary safety endpoint, the incidence of GUSTO-defined severe bleeding was 0.16% in the cangrelor group compared to 0.11% in the clopidogrel group (odds ratio, 1.50; 95% CI, 0.53-4.22; P ═ 0.44) (table 15). Bleeding events defined according to several other bleedings were also detected (table 17). In the post hoc analysis, the primary efficacy endpoint and the primary safety endpoint were combined to provide a combined endpoint of net incidence of adverse clinical events of 4.8% in the cangrelor group compared to 6.0% in the clopidogrel group (odds ratio, 0.80; 95% CI, 0.68-0.94; P ═ 0.008) (table 15).

Table 15: efficacy and safety endpoints 48 hours after randomization

GUSTO represents global use of the open occlusion coronary strategy, while TIMI represents thrombolysis in myocardial infarction. The pre-set logistic regression analysis was adjusted for baseline status (abnormal normal ratio) and initial dose of clopidogrel (600mg to 300 mg). The primary efficacy and primary safety endpoints are combined to provide a combined endpoint for a net adverse clinical event in the modified intended treatment population.

Table 16: additional efficacy endpoints of the modified intended treatment population 48 hours after randomization

MI indicates myocardial infarction, ST indicates stent thrombosis, and IDR indicates ischemia-driven revascularization.

Table 17: additional efficacy and safety endpoints 48 hours after randomization

MI means myocardial infarction, ST means stent thrombosis, IDR means ischemia-driven revascularization, CV means cardiovascular, GUSTO means global use of the open-occlusion coronary strategy, acuty means acute catheter and emergency interventional therapy strategy trial, and BARC means blanking Academic Research Consortium.

The incidence of thrombosis in the stent was lower in the cangrelor group than in the clopidogrel group (0.6% to 1.0%; odds ratio, 0.65; 95% CI, 0.42-0.99; P ═ 0.04). The use of glycoprotein IIb/IIIa inhibitors for rescue therapy was 2.3% for cangrelor compared to 3.5% for clopidogrel (odds ratio, 0.65; 95% CI, 0.52-0.82; P < 0.001). The incidence of surgical complications is lower for cangrelor than clopidogrel (3.4% vs. 4.5%; odds ratio, 0.74; 95% CI, 0.61-0.90; P ═ 0.002).

At 30 days, the combined efficacy endpoint rate remained significantly lower in the cangrelor group than in the clopidogrel group (6.0% to 7.0%; odds ratio, 0.85; 95% CI, 0.73-0.99; P ═ 0.03); the relative reduction in stent thrombosis also persisted (1.3% to 1.9%; ratioed, 0.68; 95% CI, 0.50-0.92; P ═ 0.01) (table 18).

Table 18: efficacy results 30 days after randomization

' Preset logistic regression analysis was adjusted for baseline biomarker status (normal vs. abnormal) and initial dose of clopidogrel (600-mg to 300-mg).

The rate of adverse events associated with treatment was similar in the cangrelor and clopidogrel groups (20.2% and 19.1%, respectively; P ═ 0.13); 0.5% of these adverse events in the cangrelor group and 0.4% of those in the clopidogrel group led to termination of the study drug (P ═ 0.21). There were significantly more transient dyspnea events with cangrelor than with clopidogrel (1.2% vs. 0.3%, P <0.001) (table 19).

Table 19: statistically significant treatment emergencies at 48 hours after randomization (safety cohort)

The P value was not adjusted for multiple comparisons.

The reduction in primary efficacy endpoint with cangrelor was consistent across multiple subgroups with no significant interaction with baseline variables except status with respect to peripheral arterial disease history. The benefits of using cangrelor were similar in patients exhibiting STEMI, patients exhibiting non-ST-segment elevated acute coronary syndrome and patients exhibiting stable angina. There was no heterogeneity of therapeutic effect between american patients and patients in other countries (P ═ 0.26) (table 10).

According to the protocol, patients received an initial dose of clopidogrel or placebo after describing their coronary anatomy. Most patients received an initial dose (63.4%) before PCI began. Prior to PCI completion, the remaining patients received an initial dose (6.4%) in the catheter lab within 1 hour after PCI completion (30.1%) or more than 1 hour after PCI completion (0.1%). There was no significant difference in cangrelor effect on the primary endpoint between patients receiving the initial dose immediately prior to PCI (odds ratio, 0.80; 95% CI, 0.64-0.98) and patients receiving it during or after PCI (odds ratio, 0.79; 95% CI, 0.59-1.06) (P ═ 0.99 for interactions). Similarly, there was no significant difference in the effect of cangrelor on the primary endpoint between patients receiving an initial dose of 600-mg of clopidogrel (74.4% of the population) and patients receiving an initial dose of 300-mg (25.6% of the population): the odds ratio of the primary endpoints with cangrelor was 0.77 (95% CI, 0.63-0.94) with an initial dose of 600-mg and 0.84 (95% CI, 0.62-1.14) with an initial dose of 300-mg (for interactions P ═ 0.62). The protocol required at least 2 hours of study drug infusion; median duration of infusion in the cangrelor group was 129 median (quartile range, 120-; the duration of the infusion was similar in the clopidogrel group (where the patients received placebo infusions). Subgroup analysis showed that cangrelor effects were similar in patients receiving 129 minutes or less infusion (odds ratio, 0.85; 95% CI, 0.68-1.07) and patients receiving more than 129 minutes infusion (odds ratio, 0.72; 95% CI, 0.56-0.92) (P ═ 0.31 for interactions) (figure 10).

Because of the primary safety endpoint, the incidence of GUSTO-defined severe bleeding was very low, severe bleeding according to the GUSTO standard was combined with moderate bleeding to provide a large number of events for analysis of potential subgroup interactions. There was no interaction at P <0.05 (fig. 11).

Intravenous ADP-receptor blockade with cangrelor significantly reduced the incidence of perioperative complications of PCI, including stent thrombosis, compared to clopidogrel administered either before or immediately after PCI. Reduction of the incidence of acute perioperative myocardial infarction represents the majority of the benefit. The likelihood of ischemic events was 22% lower with cangrelor compared to clopidogrel, and this benefit was not accompanied by a significant increase in severe bleeding or the need for infusion. In addition, with cangrelor the potential for stent thrombosis was 38% lower than with clopidogrel. The use of cangrelor resulted in a reduction in ischemic complications in all patients receiving PCI of the same age, with consistent benefit in the main subgroup.

Examples 1 and 2 demonstrate the clinical benefits of cangrelor, including a significant reduction in the secondary endpoint of stent thrombosis. However, the incidence of the primary endpoint was not reduced in the previous examples, probably because the definition of perioperative myocardial infarction in these studies did not allow discrimination of infarction in patients who proposed PCI immediately after admission of biomarker-positive acute coronary syndrome. In the trial described in example 3, the definition of perioperative myocardial infarction requires careful evaluation of the patient's baseline biomarker status. Furthermore, the use of an angiographic core laboratory allows objective determination of intra-operative complications. Table 20 lists the differences between the tests described in example 1/example 2 and the tests described in example 3.

Table 20: differences between the study of example 3 and the studies of examples 1 and 2

PCI means percutaneous coronary intervention, STEMI means ST-segment elevated myocardial infarction, NSTEMI means non-ST-elevated myocardial infarction, ECG means electrocardiogram, NSTE-ACS means non-ST-segment elevated acute coronary syndrome, MI means myocardial infarction, IDR means ischemia-driven revascularization, ST means stent thrombosis, UDMI means general definition of myocardial infarction, CKMB means creatine kinase-myocardial band isozyme, and ULN means upper limit of normal.

Bhatt DL,et al.N Engl J Med 2009；361 2330-41.

Harrington RA,et al.N Engl J Med 2009；361 2318-29

White HD,Am Heart J 2012；163:182-190.e4

Thygesen,J Am Coll Cardiol 2007；50:2173–95.

Example 4: pharmacodynamic effects during transition from cangrelor to ticagrelor and vice versa

The objective of this study was to determine whether the pharmacodynamic effects of cangrelor would be maintained if ticagrelor was administered during a cangrelor infusion, and whether prior treatment with ticagrelor altered the pharmacodynamic effects of cangrelor.

Method

The study involved 12 patients who met the following criteria: aged 18-75 years, with Coronary Artery Disease (CAD) as evidenced by previous MI or coronary revascularization, and administered 81mg aspirin per day. Exclusion criteria included acute coronary syndrome over the past 12 months, treatment with anticoagulants or antiplatelet agents other than aspirin, history of bleeding diathesis, anemia (hematocrit < 35%), severe renal insufficiency (creatinine clearance less than 30ml/min), and moderate or severe hepatic insufficiency. Prohibited combinations include potent CYP3A inhibitors, simvastatin and lovastatin at doses exceeding 40 mg/day, omeprazole or esomeprazole, and digoxin. The use of non-steroidal anti-inflammatory agents was discouraged but not prohibited during study participation.

Each patient was administered a 30 μ g/kg bolus of cangrelor immediately followed by a 2hr infusion at a rate of 4.0 μ g/kg/min. 0.5hr or 1.25hr (6 per n) was followed by an initial dose of ticagrelor (180 mg). After 0.5 or 1.25hr (corresponding to ticagrelor prime time, 6 for each n), blood for pharmacodynamic platelet function was then collected at 1.75, 2, 2.25, 2.5, 2.75, 3, 4, and 5.25 hr. Patients were randomized to receive 6 (n-6) or 7 (n-6) doses of ticagrelor every 12 hours after termination of cangrelor infusion. On study day 5, each patient was given a 30 μ g/kg bolus of cangrelor followed immediately by a 2hr infusion at a rate of 4.0 μ g/kg/min. Blood for pharmacodynamic evaluation was collected after 1 and 2 hr. Adverse events were asked throughout study participation and ended with telephone visits made on days 10-12 of the study.

Pharmacodynamic evaluation includes light transmission concentration (LTA),P2Y12 assay, vasodilator stimulated phosphoprotein (VASP) index, and platelet activation measured using flow cytometry. LTA, LTA,And evaluation of platelet activation using flow cytometry was performed within 30min of blood collection. In the case of flow cytometry, samples are processed to be fixed and then used in batches for analysis. For VASP, the index samples were batched and processed as recommended by the supplier within 2h of blood collection. This method limits the time from the fixing of the VASP index to the flow analysis to less than 1 h.

Adenosine Diphosphate (ADP) -induced LTA was quantified 5 μ M and 20 μ M ex vivo (i.e., in unmodified platelet rich plasma). Platelet-deficient plasma was set at 100% aggregation and maximum (peak) and endpoint (at 300 s) aggregation was measured with a PAP4 platelet aggregometer (BioData, Horsham, PA). Used according to the instructions provided by the manufacturerP2Y12 (Accumetrics Inc, San Diego, California) by using prostaglandins in addition to ADPE1 activated platelets to measure drug pair P2Y ₁₂ The effect of the receptor. Platelet activity is expressed as P2Y12 response units (PRU). Identification of platelet activation Using flow cytometry as previously described ¹⁷ 。

Furthermore, to determine the VASP index, a commercially available kit (diagnostic Stago, Inc, Parsippany NJ) was used.

Results

Clinical characteristics of the patients are shown in table 21.

Table 21: clinical features

ACEI ═ angiotensin converting enzyme inhibitors; ARB ═ angiotensin receptor blockers; ca ═ calcium; CABG ═ coronary artery bypass; MI ═ myocardial infarction; PCI is a percutaneous coronary intervention.

As shown in fig. 12, the final (after 5min) aggregation measured by LTA was inhibited extensively and consistently during cangrelor infusion. At the time of cangrelor infusion, the remaining platelet activity was < 4% and the degree of inhibition was > 95%. As shown in table 22 and fig. 13, previous treatment with ticagrelor did not alter the inhibitory effect of cangrelor, and consistent pharmacodynamic effects were evident for each secondary measure of platelet function.

Table 22: pharmacodynamic effects of cangrelor

Inhibition of IPA/R ═ platelet aggregation/reactivity; LTA — final (5min) light transmission concentration measurement; PR ═ platelet reactivity; PRU ═ P2Y12 reaction units; VASP ═ vasodilator-stimulated phosphoprotein; for flow cytometry, P-selectin (shown), PAC-1 binding (not shown) in response to 1. mu.M ADP was comparable.

Table 23: pharmacodynamic Effect of Ticagrelor

IPA/R ═ inhibition of platelet aggregation/reactivity; LTA ═ final (5min) light transmission integration degree measurement; PR ═ platelet reactivity; PRU ═ P2Y12 reaction units; VASP ═ vasodilator-stimulated phosphoprotein; for flow cytometry, P-selectin (shown), PAC-1 binding (not shown) in response to 1. mu.M ADP was comparable.

A modest increase in platelet reactivity was evident during the first hour after termination of cangrelor (see fig. 12 and 13). The increment was not significantly different from the reference time point (5.25 hr). Earlier administration of ticagrelor (at 0.5hr rather than 1.25hr) appeared to attenuate the increase in residual platelet reactivity, and the degree of increased inhibition was evident. The remaining platelet reactivity (16 ± 15%) observed at 2.5hr when ticagrelor was administered at 0.5hr was comparable to the remaining platelet reactivity (12 ± 9%) observed 12 hours after the last dose of ticagrelor measured on day 5 of the study.

In the pooled total population, the remaining reactivity was maximal at 0.5h after cessation of cangrelor, 19%, and then decreased again at the end of the observation period (5.25h) to<5 percent. This restoration of function may not be clinically significant, as the effect is moderate, transient, and maintains very low platelet reactivity throughout the transition phase. Extent of platelet reactivity throughout the transition time with P2Y ₁₂ The presence of inhibition is consistent and well below the threshold known to be associated with increased risk of thrombotic events.

For the transition between ticagrelor and cangrelor on day 5, there was no significant interaction between the drugs, whether ticagrelor was terminated 12 or 24 hours prior to the start of the cangrelor infusion.

No serious adverse events (ischemia or hemorrhage) occurred between trials. Other adverse events are summarized in table 24.

Table 24: other adverse events reported above them a threshold of frequency for other adverse events: 0 percent

Pharmacodynamic evaluations confirmed that the platelet reactivity remaining during cangrelor infusion was limited whether ticagrelor was administered during infusion or had been administered prior to infusion. The endpoint aggregation of platelets responded to 20 μ M ADP, with less than 5% platelet reactivity remaining and greater than 95% inhibition during cangrelor treatment.

During the transition from cangrelor to ticagrelor, a modest, insignificant increase in platelet reactivity was observed during the first hour after cessation of cangrelor. Earlier administration of ticagrelor appeared to attenuate the increase in platelet reactivity.

Comparison of the results obtained after the equivalence interval increases the likelihood of moderate interaction. For patients given ticagrelor at 1.25hr (0.75 hr prior to cessation of cangrelor), residual platelet reactivity and inhibition levels of 4.5 ± 3.4% and 93 ± 7% were observed at 1.75hr (at 3.0hr) after the initial dose. For patients given ticagrelor at 0.5hr, the results were 13 ± 9.3% and 2 ± 13% after 1.75hr (at 2.25 hr).

In summary, ticagrelor administered prior to or during cangrelor infusion did not diminish the pharmacodynamic effects of cangrelor. Furthermore, the pharmacodynamic effects of ticagrelor are retained when ticagrelor is administered during a cangrelor infusion. Consistent with the reversible binding of ticagrelor, this oral administration of P2Y ₁₂ The antagonist can be administered before, during, or after treatment with cangrelor. Consistent with its pharmacokinetics, the pharmacodynamic effect is greater when ticagrelor is administered earlier。

Example 5: group pharmacodynamic evaluation of cangrelor

Purpose(s) to

The objective of this evaluation was to develop a population pharmacodynamic model to describe the concentration-effect relationship between cangrelor exposure and platelet aggregation markers, i.e., byAccumetrics measures P2Y12 response units (PRU) to determine how to optimally transition from the bridge dose to the PCI dose and vice versa.

Data and database generation

The database generated for this evaluation included a total of 1102 PRUs observed from 220 bridges and PCI patients. A summary of the demographics is provided in table 25. These patients are generally older and heavier than volunteers.

Table 25: summary of demographics of patients participating in the study

ACS represents an acute coronary syndrome. PCI means percutaneous coronary intervention.

Simulation evaluation

To address pharmacodynamic objectives and to show how to optimally transition from one dose to another (i.e., bridge and PCI), random simulations were performed in NONMEM. A PRU value of 208 was selected as a cutoff throughout the evaluation to evaluate the effectiveness of varying doses of cangrelor in different patient types. Results were evaluated graphically by generating 95% confidence intervals and summarizing the percentage of patients expected to reach PRU values of 208 or less. For each simulation scenario, 1000 patients were simulated with covariates plotted from the original distribution of covariate values. These simulations did not take into account parameter accuracy.

The bridge subset from the data is patient sampled. At various times after the initiation of the bridge dose, the patient type was switched to PCI type (to reflect reduced sensitivity to cangrelor) and the dose was increased to the PCI dose. The percentage of individuals that reach the desired PRU result 208 or lower is tabulated. For completeness, a reverse transition (from PCI to bridge) is also simulated, and the results are tabulated.

Description of PRU pharmacodynamic model

The PRU pharmacodynamic model is a direct effect sigmoidal inhibition model, and the term describes the inter-individual variability included on the drug effect parameter (Emax) and baseline. Additional residuals are used. The model incorporates a slowly increasing baseline in bridge patients (attributable to the gradual disappearance of the effects of previous dosing with clopidogrel) and a decreasing baseline in PCI patients (due to the gradual decrease in thrombotic stimulation of the stent implantation/PCI after surgery along with the occurrence of other post-operative therapeutic effects). The model also included the covariates of patient type versus drug effect as well as the effect of age and gender on baseline. The equations of the final PRU pharmacodynamic model are provided below.

Effect is theta ₇ (1-patient type θ) ₁₀ )*exp(η4)

IC50＝θ ₈

γ＝θ ₉

if (research 1) loss θ ₁₃ elseθ ₁₄

PRU ═ baseline PRU-drug effect-time to loss (hr)

The parameters are estimated with high accuracy, except for the age effect of the baseline. All other diagnoses and model evaluations indicate that the model performance is acceptable. The parameters from the model are provided in table 26.

Table 26: parameter estimation of a basic PRU pharmacodynamic model

NE-not estimated.

Several covariates were identified in this evaluation. Gender had an effect on baseline PRU, with women having 16% higher baseline PRU than men. Age was also found to be important for baseline PRU values. The effect of age is provided in table 27.

Table 27: effect of age on Baseline PRU

Age (year of old)	Baseline PRU	Percentage of reference
			30	215	100
40	230	107
			50	242	112
60	252	117
			70	261	121
80	269	125

In the age range of 30-80 years, a 25% increase in baseline PRU is expected. The patient type (i.e., PCI patient versus bridge patient) had a greater impact on drug efficacy, which is shown in fig. 14. This effect is an effect of a 62% reduction in PCI relative to the bridge and indicates why the percentage of simulated PCI patients who reach the threshold response 208 is slightly lower than that observed in bridge patients.

Simulation results are as follows: evaluation of the likelihood of reaching a desired PRU cutoff

The likelihood of the PCI and bridge patients reaching the desired PRU cutoff 208 is generally provided in table 28.

Table 28: likelihood of patient type achieving desired PRU outcome-Overall study outcome

Study of	Type of patient	Dosage form	Possibility of
				1	PCI	30 ug/kg bolus with 4 ug/kg/min	0.827462
2	Bridge with a bridge body	0.75μg/kg/min	0.961949

It can be seen that although the dose for the bridge patients is lower, the probability of reaching the threshold is higher in these patients than in the PCI patients, since the PCI patients have a higher immediate thrombotic stimulation.

Similarly, after stratification of patients by weight exceeding the weight range in the database, the possibility of maintaining PRU below threshold showed no general trend (table 29), indicating that at the recommended dose, the drug concentration was sufficient to provide approximately 80% or less of the threshold for PCI patients and 90% or less of the threshold PRU for bridge patients.

Table 29: likelihood of patient type and weight achieving desired PRU outcome

Study of	Type of patient	Dosage form	Body weight range (kg)	Possibility of
					1	PCI	30 ug/kg bolus and 4 ug/kg/min	(50,80)	0.839885
1	PCI	30 ug/kg bolus and 4 ug/kg/min	(80,90)	0.795222
					1	PCI	30 ug/kg bolus with 4 ug/kg/min	(90,100)	0.7975
1	PCI	30 ug/kg bolus and 4 ug/kg/min	(100,120)	0.87275
					1	PCI	30 ug/kg bolus with 4 ug/kg/min	(120,160)	0.856
2	Bridge with a bridge body	0.75μg/kg/min	(50,80)	0.95797
					2	Bridge with a bridge body	0.75μg/kg/min	(80,90)	0.98004
2	Bridge with a bridge body	0.75μg/kg/min	(90,100)	0.952081
					2	Bridge with a bridge body	0.75μg/kg/min	(100,120)	0.957313
2	Bridge with a bridge body	0.75μg/kg/min	(120,160)	0.9915

With respect to age, there was no significant trend in the likelihood of the patient reaching the threshold (table 30).

Table 30: likelihood of patient type and age achieving desired PRU outcome

Study of	Type of patient	Dosage form	Age range (year of age)	Possibility of
					1	PCI	30 ug/kg bolus with 4 ug/kg/min	(30,50)	0.896722
1	PCI	30 ug/kg bolus and 4 ug/kg/min	(50,60)	0.806719
					1	PCI	30 ug/kg bolus and 4 ug/kg/min	(60,70)	0.836735
1	PCI	30 ug/kg bolus with 4 ug/kg/min	(70,80)	0.778786
					1	PCI	30 ug/kg bolus with 4 ug/kg/min	(80,100)	0.791333
2	Bridge with a bridge body	0.75μg/kg/min	(30,50)	0.994444
					2	Bridge with a bridge body	0.75μg/kg/min	(50,60)	0.98919
2	Bridge with a bridge body	0.75μg/kg/min	(60,70)	0.984217
					2	Bridge with a bridge body	0.75μg/kg/min	(70,80)	0.93135
2	Bridge with a bridge body	0.75μg/kg/min	(80,100)	0.869444

With respect to gender, there was no significant trend in the likelihood of the patient reaching the threshold (table 31).

Table 31: likelihood of patient type and gender achieving desired PRU outcome

Study of	Type of patient	Dosage form	Sex	Possibility of
					1	PCI	30 ug/kg bolus with 4 ug/kg/min	Male sex	0.866044
1	PCI	30 ug/kg bolus and 4 ug/kg/min	Female with a view to preventing the formation of wrinkles	0.754583
					2	Bridge with a bridge body	0.75μg/kg/min	Male sex	0.982444
2	Bridge with a bridge body	0.75μg/kg/min	Female with a view to preventing the formation of wrinkles	0.901222

These results support the selection of higher doses for PCI patients than for bridge patients and indicate that dose adjustments for age or gender should not be required.

Simulation results are as follows: transition from bridge to PCI

The results of simulated transition from the bridge setting (0.75 μ g/kg/min) to the PCI setting (4 μ g/kg/min) are provided in fig. 15 and 16, respectively, for reference male patients, with or without administration of an IV bolus initial dose of PCI (30 μ g/kg). As seen by assessing the likelihood of reaching a threshold PRU response, the likelihood of PCI is generally lower in all settings than in bridge patients. The same was simulated in reference female patients, with or without IV bolus doses (fig. 17 and 18, respectively). The benefit of adding a bolus dose at the transition from bridge to PCI is somewhat limited, but the likelihood of maintaining a PRU value below 208 with the recommended initial dose is higher than without such an IV bolus dose before PCI.

Simulation results are as follows: transition from PCI to bridge

The results of a random simulation from a PCI setting (30 μ g/kg bolus and 4 μ g/kg/min) to a bridge setting (0.75 μ g/kg/min) were provided for the same virtual male and female patients in fig. 19 and 20, respectively. In these simulations, patients received the recommended PCI dose for 2 hours, then transitioned directly to the recommended bridge dose for 8 hours. PRU samples were collected every hour. But because these virtual patients were simulated to reflect PCI patients (and thus patients who did not have a high dose of cangrelor before PCI), the evanescent effect observed by the bridge study would be turned off. But once bridge dosing begins, the ability of the individual to respond to cangrelor changes.

While these figures show a large difference between men and women, the determined likelihood of reaching a PRU below threshold 208 is similar. These figures therefore reflect any difference in the intrinsic variability of PRU assays more than the intrinsic responsiveness to treatment.

The results of the stochastic simulations indicate that there is no need to modify cangrelor dosing (e.g., dose adjustments) from that conventionally used for these indications when transitioning from the bridge setting to the PCI setting, or vice versa. PCI patients transitioning to surgery can transition directly from 4. mu.g/kg/min cangrelor to 0.75. mu.g/kg/min cangrelor. Surgical patients transitioning to PCI can transition directly from 0.75 μ g/kg/min cangrelor to 4 μ g/kg/min cangrelor, with or without a bolus dose of 30 μ g/kg cangrelor.

Having thus described in detail embodiments of the present invention, it is to be understood that the invention defined in the foregoing paragraphs is not to be limited to specific details shown in the above description as many apparent variations thereof are possible without departing from the spirit or scope of the invention.

Reference to the literature

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The present application also includes the following specific embodiments:

1. a method of transitioning a patient from administration of cangrelor during Percutaneous Coronary Intervention (PCI) to administration of ticagrelor for chronic treatment, the method comprising:

(1) administering intravenously a 30 μ g/kg bolus of cangrelor prior to the initiation of PCI;

(2) intravenously administering a continuous infusion of 4 μ g/kg/min of cangrelor after administration of the bolus;

(3) continued continuous infusion administration for longer periods of time: (a) a duration of at least 2 hours or (b) PCI; and

(4) administering an oral dose of ticagrelor (a) during administration of the continuous infusion or (b) after termination of administration of the continuous infusion, wherein the oral dose comprises a 180mg loading dose of ticagrelor.

2. The method of embodiment 1, wherein the patient receives oral P2Y prior to administration of cangrelor ₁₂ Treating without diminishing the effectiveness of cangrelor.

3. The method of embodiment 2, wherein said oral administration of P2Y ₁₂ The treatment is selected from clopidogrel, prasugrel and ticagrelor.

4. The method of embodiment 1, wherein cangrelor is in a pharmaceutical composition comprising 200 μ g/mL cangrelor.

5. The method of embodiment 4, wherein the pharmaceutical composition further comprises 0.9% sodium chloride injection or 5% dextrose injection.

6. The method of embodiment 1, wherein said bolus is administered in less than 1 minute.

7. The method of embodiment 1, wherein said continuous infusion is for a total duration of up to about 4 hours.

8. The method of embodiment 1, wherein the method further comprises administering one or more oral doses of ticagrelor after the priming dose.

9. The method of specific embodiment 8, wherein the one or more subsequent oral doses comprise 90mg of ticagrelor.

10. The method of embodiment 1, wherein administration of said continuous infusion is initiated immediately after administration of the bolus.

11. The method of embodiment 1, wherein said method further comprises administering aspirin prior to or during administration of said continuous infusion.

12. A method of transitioning a patient from administration of cangrelor during Percutaneous Coronary Intervention (PCI) to administration of ticagrelor for long-term treatment, the method comprising:

(1) administering intravenously a 30 μ g/kg bolus of cangrelor prior to the initiation of PCI;

(2) intravenously administering a continuous infusion of 4 μ g/kg/min of cangrelor following administration of the bolus;

(3) continued continuous infusion for longer periods of administration of cangrelor: (a) a duration of at least 2 hours or (b) PCI; and

(4) administering an oral dose of ticagrelor during administration of the continuous infusion, wherein the oral dose comprises a 180mg loading dose of ticagrelor.

13. The method of embodiment 12, wherein the patient receives oral P2Y prior to administration of cangrelor ₁₂ Treating without diminishing the effectiveness of cangrelor.

14. The method of embodiment 13, wherein said oral administration of P2Y ₁₂ The treatment is selected from clopidogrel, prasugrel and ticagrelor.

15. The method of embodiment 12, wherein cangrelor is in a pharmaceutical composition comprising 200 μ g/mL cangrelor.

16. The method of embodiment 15, wherein the pharmaceutical composition further comprises 0.9% sodium chloride injection or 5% dextrose injection.

17. The method of embodiment 12, wherein said bolus is administered in less than 1 minute.

18. The method of embodiment 12, wherein said continuous infusion is for a total duration of up to about 4 hours.

19. The method of embodiment 12, wherein the method further comprises administering one or more oral doses of ticagrelor subsequent to the priming dose.

20. The method of specific embodiment 19, wherein the one or more subsequent oral doses comprise 90mg of ticagrelor.

21. The method of embodiment 19, wherein said one or more subsequent oral doses are continued after termination of said administration by continuous infusion.

22. A method of transitioning a patient from administration of cangrelor during Percutaneous Coronary Intervention (PCI) to administration of ticagrelor for long-term treatment, the method comprising:

(1) administering intravenously a 30 μ g/kg bolus of cangrelor prior to the initiation of PCI;

(2) intravenously administering a continuous infusion of 4 μ g/kg/min of cangrelor following the bolus administration;

(3) continued continuous infusion administration for longer periods of time: (a) a duration of at least 2 hours or (b) PCI; and

(4) administering an oral dose of ticagrelor after termination of the administration of the continuous infusion, wherein the oral dose comprises a 180mg loading dose of ticagrelor.

23. The method of embodiment 22, wherein the patient receives oral P2Y prior to administration of cangrelor ₁₂ Treating without diminishing the effectiveness of cangrelor.

24. The method of embodiment 23, wherein said oral administration of P2Y ₁₂ The treatment is selected from clopidogrel, prasugrel and ticagrelor.

25. The method of embodiment 22, wherein cangrelor is in a pharmaceutical composition comprising 200 μ g/mL cangrelor.

26. The method of embodiment 25, wherein said pharmaceutical composition further comprises 0.9% sodium chloride injection or 5% dextrose injection.

27. The method of embodiment 22, wherein said bolus is administered in less than 1 minute.

28. The method of specific embodiment 22, wherein the continuous infusion is for a total duration of up to about 4 hours.

29. The method of embodiment 22, wherein the method further comprises administering one or more oral doses of ticagrelor subsequent to the loading dose.

30. The method of specific embodiment 29, wherein the one or more subsequent oral doses comprise 90mg of ticagrelor.

Claims (10)

1. A method of transitioning a patient from administration of cangrelor during Percutaneous Coronary Intervention (PCI) to administration of ticagrelor for long-term treatment, the method comprising:

(1) administering intravenously a 30 μ g/kg bolus of cangrelor prior to the initiation of PCI;

(2) intravenously administering a continuous infusion of 4 μ g/kg/min of cangrelor after administration of the bolus;

(3) continued continuous infusion was administered for a longer period of time: (a) a duration of at least 2 hours or (b) PCI; and

(4) administering an oral dose of ticagrelor (a) during administration of the continuous infusion or (b) after termination of administration of the continuous infusion, wherein the oral dose comprises a 180mg loading dose of ticagrelor.

2. The method of claim 1, wherein the patient receives oral P2Y prior to administration of cangrelor ₁₂ Treating without diminishing the effectiveness of cangrelor.

3. The method of claim 2, wherein said oral administration of P2Y ₁₂ The treatment is selected from clopidogrel, prasugrel and ticagrelor.

4. The method of claim 1, wherein cangrelor is in a pharmaceutical composition comprising 200 μ g/mL cangrelor.

5. The method of claim 4, wherein the pharmaceutical composition further comprises 0.9% sodium chloride injection or 5% dextrose injection.

6. The method of claim 1, wherein the bolus is administered in less than 1 minute.

7. The method of claim 1, wherein the continuous infusion is continued for a total duration of up to about 4 hours.

8. The method of claim 1, wherein the method further comprises administering one or more oral doses of ticagrelor after the priming dose.

9. The method of claim 8, wherein the one or more subsequent oral doses comprise 90mg of ticagrelor.

10. The method of claim 1, wherein administration of the continuous infusion is initiated immediately after administration of the bolus.