WO2016060096A1 - ホスホリルコリン基含有化合物およびホスホリルコリン複合体 - Google Patents
ホスホリルコリン基含有化合物およびホスホリルコリン複合体 Download PDFInfo
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- WO2016060096A1 WO2016060096A1 PCT/JP2015/078862 JP2015078862W WO2016060096A1 WO 2016060096 A1 WO2016060096 A1 WO 2016060096A1 JP 2015078862 W JP2015078862 W JP 2015078862W WO 2016060096 A1 WO2016060096 A1 WO 2016060096A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/76—Albumins
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/09—Esters of phosphoric acids
- C07F9/12—Esters of phosphoric acids with hydroxyaryl compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/09—Esters of phosphoric acids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/553—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having one nitrogen atom as the only ring hetero atom
- C07F9/572—Five-membered rings
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
Definitions
- the present invention relates to a phosphorylcholine group-containing compound and a phosphorylcholine complex.
- PC Phosphorylcholine
- a compound having a PC group is used as a PC antigen for the purpose of producing a PC-specific antibody.
- Patent Document 1 discloses a use example of a PC antigen in immunotherapy of atherosclerosis.
- Atherosclerosis is a chronic disease that causes thickening of the innermost layer (intima) of the aorta and middle artery, and is a major cause of cardiovascular diseases including myocardial infarction. In affected areas of atherosclerosis, blood flow is reduced, and ischemia and tissue destruction can occur in tissues supplied by affected blood vessels.
- Patent Document 1 by using a PC-protein complex in which an immunological carrier protein and PC are bound as a PC antigen, a monoclonal antibody having a PC specificity and a composition thereof can be obtained.
- PC-specific monoclonal antibodies and compositions thereof have been shown to be useful for immunotherapy of atherosclerosis.
- Patent Document 2 discloses the use of a PC antigen as a vaccine for inducing immune protection against infections such as Streptococcus pneumoniae. Another example of research aimed at such a vaccine is Non-Patent Document 1.
- Non-Patent Document 1 reports that the PC antibody titer is increased by administering a PC-protein complex in the presence of an immunopotentiator in animal experiments.
- an object of the present invention is to provide a phosphorylcholine group-containing compound and a phosphorylcholine complex which can be easily produced and can produce a phosphorylcholine complex suitable for use as a phosphorylcholine antigen.
- the present inventors have found that a compound having a compact structure having an aromatic carboxylic acid structure in the molecule can solve the above problems unexpectedly, and The invention has been completed. That is, the present invention includes the following [1] to [4].
- a phosphorylcholine-protein complex having a structure in which a phosphorylcholine group-containing compound having a structure represented by the following formula (1 ′) and an amino acid amine moiety of a protein are amide-bonded. ... (1 ') (X represents a hydrogen atom or a monovalent cation residue.)
- a phosphorylcholine-peptide complex having a structure in which a phosphorylcholine group-containing compound having a structure represented by the following formula (1 ′) and an amino acid amine moiety of an oligopeptide are bonded with an amide bond. ... (1 ') (X represents a hydrogen atom or a monovalent cation residue.)
- a phosphorylcholine-amino acid complex having a structure in which a phosphorylcholine group-containing compound having a structure represented by the following formula (1 ′) and an amino acid amine site of an amino acid are bonded with an amide bond. ... (1 ') (X represents a hydrogen atom or a monovalent cation residue.)
- 1 is a 1 H NMR spectrum of 4-methoxycarbonylphenylphosphorylcholine. It is a 31 P NMR spectrum of 4-methoxycarbonylphenylphosphorylcholine.
- 4 is an MS spectrum of 4-methoxycarbonylphenylphosphorylcholine.
- 1 is a 1 H NMR spectrum of 4-carboxyphenylphosphorylcholine obtained by the DBU method. It is a 31 P NMR spectrum of 4-carboxyphenylphosphorylcholine obtained by the DBU method.
- 3 is an MS spectrum of 4-carboxyphenylphosphorylcholine obtained by the DBU method.
- 1 is a 1 H NMR spectrum of 4-methylphenylphosphorylcholine. It is a 31 P NMR spectrum of 4-methylphenylphosphorylcholine.
- 4 is an MS spectrum of 4-methylphenylphosphorylcholine.
- 1 is a 1 H NMR spectrum of 4-carboxyphenylphosphorylcholine obtained by the permanganic acid method. It is a 31 P NMR spectrum of 4-carboxyphenylphosphorylcholine obtained by the permanganic acid method.
- 3 is an MS spectrum of 4-carboxyphenylphosphorylcholine obtained by the permanganic acid method. It is an HPLC chromatogram before reaction in the synthesis of a PC-amino acid complex. It is an HPLC chromatogram after reaction in the synthesis of a PC-amino acid complex. 2 is an MS spectrum of a PC-phenylalanine complex.
- 1 is a 1 H NMR spectrum of 4-carboxyphenylphosphorylcholine succinimidyl. It is a 31 P NMR spectrum of 4-carboxyphenylphosphorylcholine succinimidyl. 4 is an MS spectrum of 4-carboxyphenylphosphorylcholine succinimidyl.
- Phosphorylcholine (PC) group-containing compound The phosphorylcholine group-containing compound of the present invention has a structure represented by the following formula (1).
- the monovalent cation residue is not particularly limited, but alkali metals such as lithium, sodium and potassium, or ammonia, imidazole, dimethylaminopyridine, triethylamine, diazabicyclooctane, diazabicyclononene (DBN), And nitrogen-containing organic compounds in which diazabicycloundecene (DBU) or the like is protonated.
- X is a hydroxysuccinimide body having a structure represented by the above formula (2), it is more advantageous to lead the PC complex by advancing the amidation reaction advantageously as an active carboxyl group. Hydroxysuccinimide is eliminated rapidly after amidation.
- the —COOX group in the formula (1) is bonded to any carbon on the benzene ring, but is preferably bonded to the phosphorylcholine group at the para-position.
- the PC group-containing compound of the present invention has a structure in which one PC group and one carboxyl group are bonded to a benzene nucleus. That is, by having one carboxyl group in one molecule, a crosslinking reaction does not occur when binding to a protein, oligopeptide or amino acid.
- a crosslinking reaction does not occur when binding to a protein, oligopeptide or amino acid.
- PC group-containing compound of the present invention can be produced by the following production method 1 or 2.
- -Manufacturing method 1 A compound having a structure represented by the formula (1) having a carboxyl group is generated by hydrolyzing a compound having a structure represented by the following formula (3) using a basic compound.
- R represents an alkyl group having 1 to 6 carbon atoms or a benzyl group.
- a compound having a structure represented by the formula (1) having a carboxyl group is generated by oxidizing a compound having a structure represented by the following formula (4) using an oxidizing agent.
- the PC group-containing compound production method 1 includes the following steps A1 to A3.
- Step A1 Carboxylic acid ester-containing phenolic compound and 2-chloro-2-oxo-1,3,2-dioxaphosphorane (COP) are reacted with each other in a solvent using a dechlorinating agent.
- An acid ester-containing oxaphospholane (OP) compound is produced.
- Step A2 A carboxylic acid ester-containing PC compound is produced by reacting the carboxylic acid ester-containing OP compound obtained in Step A1 with trimethylamine.
- Step A3 A compound having a structure represented by the formula (1) having a carboxyl group is obtained by hydrolyzing the ester in water in the presence of a basic compound, the carboxylic acid ester-containing PC compound obtained in Step A2. Generate.
- Step A1 is a step of producing a carboxylic acid ester-containing OP compound by reacting a carboxylic acid ester-containing phenolic compound with COP using a dechlorinating agent in a solvent.
- a carboxylic acid ester-containing phenolic compound for example, a compound having a structure in which one carboxylic acid ester is bonded to a benzene nucleus, such as oxybenzoic acid ester, can be used. These positional isomers can also be used.
- Examples of the oxybenzoic acid ester include a methyl ester type (methyl hydroxybenzoate), an ethyl ester type (ethyl hydroxybenzoate), a propyl ester type (propyl propyl hydroxybenzoate), a butyl ester type (butyl hydroxybenzoate), Examples include pentyl ester type (pentyl hydroxybenzoate), hexyl ester type (hexyl hydroxybenzoate), and benzyl ester type (benzyl hydroxybenzoate).
- the above oxybenzoic acid ester is, for example, a paraoxy such as methyl parahydroxybenzoate, ethyl parahydroxybenzoate, propyl parahydroxybenzoate, butyl parahydroxybenzoate, benzyl parahydroxybenzoate and the like.
- a benzoic acid ester is preferred.
- Step A1 can be performed in the presence of a solvent.
- a solvent an aprotic solvent is preferable.
- the aprotic solvent include nitriles such as acetonitrile, ketones such as acetone and methyl ethyl ketone, amides such as dimethylformamide, esters such as ethyl acetate and isopropyl acetate, ethers such as tetrahydrofuran, chloroform, dichloromethane and the like. And chlorinated organic solvents.
- the amount of the solvent used is not particularly limited, but from the viewpoint of temperature control during reaction and control of side reactions, 1 part by mass to 100 parts by mass of the solvent with respect to 1 part by mass of the carboxylic acid ester-containing phenolic compound. It is preferable that In particular, in consideration of economy, the amount of the solvent used is more preferably 1 part by mass to 10 parts by mass with respect to 1 part by mass of the carboxylic acid ester-containing phenolic compound.
- the reaction temperature is not particularly limited as long as it is not lower than the freezing point of the solvent, but it is preferably ⁇ 20 ° C. to 50 ° C., which allows easy temperature control. More preferably, it is ° C.
- the reaction time in step A1 is not particularly limited, but can usually be 1 to 8 hours.
- the amount of COP used is usually 0.7 to 3.0 molar equivalents and 0.8 to 2.0 molar equivalents per mole of the carboxylic ester-containing phenolic compound.
- the molar ratio is preferably 0.9 molar equivalent to 1.2 molar equivalent.
- the dehydrochlorinating agent used in Step A1 include organic bases and inorganic bases.
- the dehydrochlorinating agent is preferably trimethylamine, triethylamine, diisopropylamine, pyridine or the like.
- the amount of the dehydrochlorinating agent used is usually 0.7 to 3.0 molar equivalents relative to COP, preferably 0.8 to 2.0 molar equivalents, preferably 0.9 molar equivalents. More preferably, it is equivalent to 1.2 molar equivalents.
- Step A2 is a step of generating a carboxylic acid ester-containing PC compound by reacting the carboxylic acid ester-containing OP compound obtained in Step A1 with trimethylamine.
- Step A2 can be performed in the presence of a solvent.
- a solvent an aprotic solvent is preferable.
- the aprotic solvent include nitriles such as acetonitrile, ketones such as acetone and methyl ethyl ketone, amides such as dimethylformamide, esters such as ethyl acetate and isopropyl acetate, ethers such as tetrahydrofuran, chloroform, dichloromethane and the like. And chlorinated organic solvents.
- the amount of the solvent used is not particularly limited, but from the viewpoint of controlling the temperature during the reaction and controlling the side reaction, the solvent is used in an amount of 1 to 100 parts by mass with respect to 1 part by mass of the carboxylic acid ester-containing OP compound. Preferably there is. In particular, in view of economy, the amount of the solvent used is more preferably 1 part by mass to 20 parts by mass with respect to 1 part by mass of the carboxylic acid ester-containing OP compound.
- Step A3 is a step of synthesizing a carboxyl group-containing PC compound by hydrolyzing the ester of the carboxylic acid ester-containing PC compound obtained in Step A2 in water in the presence of a basic compound.
- Step A3 can be performed in the presence of a solvent.
- the solvent is usually water alone or a water-containing organic solvent, preferably water alone.
- the amount of the solvent used is not particularly limited, but from the viewpoint of controlling the temperature during the reaction and controlling the side reaction, the solvent is used in an amount of 1 to 100 parts by mass with respect to 1 part by mass of the carboxylic acid ester-containing PC compound. Preferably there is.
- the amount of the solvent used is more preferably 1 part by mass to 20 parts by mass with respect to 1 part by mass of the carboxylic acid ester-containing PC compound.
- the basic compound used in Step A3 is not particularly limited as long as it can cleave the ester bond and convert it to a carboxyl group.
- the basic compound include strongly basic compounds such as potassium hydroxide, sodium hydroxide, diazabicyclononene (DBN), diazabicycloundecene (DBU), and triethylamine from the viewpoint of reaction rate.
- the amount of the basic compound used can usually be 1 to 2 molar equivalents relative to the carboxylic ester-containing PC compound.
- the reaction temperature is not particularly limited, but can usually be 0 ° C. to 100 ° C.
- the reaction time in step A3 is not particularly limited, but can usually be 1 to 6 hours.
- the PC group-containing compound production method 2 includes the following steps B1 to B3.
- Step B1 An alkyl group-containing OP compound is produced by reacting an alkyl group-containing phenolic compound with COP in a solvent using a dechlorinating agent.
- Step B2 An alkyl group-containing PC compound is produced by reacting the alkyl group-containing OP compound obtained in Step B1 with trimethylamine.
- Step B3 A compound having a structure represented by Formula (1) having a carboxyl group is generated by oxidizing the alkyl group-containing PC compound obtained in Step B2 using an oxidizing agent.
- Step B1 is a step of producing an alkyl group-containing OP compound by reacting an alkyl group-containing phenolic compound with COP using a dechlorinating agent in a solvent.
- the alkyl group-containing phenolic compound for example, a compound having a structure in which one alkyl group is bonded to a benzene nucleus, such as cresol, can be used. It can also be used by the body.
- Step B1 can be performed in the presence of a solvent.
- a solvent an aprotic solvent is preferable.
- the aprotic solvent include nitriles such as acetonitrile, ketones such as acetone and methyl ethyl ketone, amides such as dimethylformamide, esters such as ethyl acetate and isopropyl acetate, ethers such as tetrahydrofuran, chloroform, dichloromethane and the like. And chlorinated organic solvents.
- the amount of solvent used is not particularly limited, but from the viewpoint of temperature control during reaction and control of side reactions, the solvent is used in an amount of 1 to 100 parts by mass with respect to 1 part by mass of the alkyl group-containing phenolic compound. Preferably there is. In particular, in consideration of economy, the amount of the solvent used is more preferably 1 part by mass to 10 parts by mass with respect to 1 part by mass of the alkyl group-containing phenolic compound.
- the reaction temperature is not particularly limited as long as it is not lower than the freezing point of the solvent, but it is preferably ⁇ 20 ° C. to 50 ° C., which allows easy temperature control. More preferably, it is ° C.
- the reaction time in step B1 is not particularly limited, but can usually be 1 to 6 hours.
- the amount of COP used is usually 0.7 molar equivalents to 3.0 molar equivalents and 0.8 molar equivalents to 2.0 molar equivalents per mole of the alkyl group-containing phenolic compound. It is preferably 0.9 molar equivalent to 1.2 molar equivalent.
- the dehydrochlorinating agent used in Step B1 include organic bases and inorganic bases. Furthermore, from the viewpoints of solubility in a solvent and filterability of the generated salt, the dehydrochlorinating agent is preferably trimethylamine, triethylamine, diisopropylamine, pyridine or the like.
- the amount of the dehydrochlorinating agent used is usually 0.7 to 3.0 molar equivalents relative to COP, preferably 0.8 to 2.0 molar equivalents, preferably 0.9 molar equivalents. More preferably, it is equivalent to 1.2 molar equivalents.
- Step B2 is a step of producing an alkyl group-containing PC compound by reacting the alkyl group-containing OP compound obtained in Step B1 with trimethylamine.
- Step B2 can be performed in the presence of a solvent.
- a solvent an aprotic solvent is preferable.
- the aprotic solvent include nitriles such as acetonitrile, ketones such as acetone and methyl ethyl ketone, amides such as dimethylformamide, esters such as ethyl acetate and isopropyl acetate, ethers such as tetrahydrofuran, chloroform, dichloromethane and the like. And chlorinated organic solvents.
- the amount of the solvent used is not particularly limited, but from the viewpoint of temperature control during reaction and controllability of side reactions, the solvent is used in an amount of 1 to 100 parts by mass with respect to 1 part by mass of the alkyl group-containing OP compound. Preferably there is. In particular, in consideration of economy, the amount of the solvent used is more preferably 1 part by mass to 20 parts by mass with respect to 1 part by mass of the alkyl group-containing OP compound.
- the reaction temperature is not particularly limited, but can usually be 40 ° C to 80 ° C.
- the reaction time in step B2 is not particularly limited, but can usually be 6 to 24 hours.
- the amount of trimethylamine used can usually be 1 to 2 molar equivalents relative to the alkyl group-containing OP compound.
- Step B3 is a step of generating a carboxyl group-containing PC compound by oxidizing the alkyl group-containing PC compound obtained in Step B2 using an oxidizing agent.
- Step B3 can be performed in the presence of a solvent.
- the solvent is not particularly limited, but is preferably a protic solvent, and more preferably water.
- the amount of solvent used is not particularly limited, but from the viewpoint of temperature control during reaction and control of side reactions, it is 1 part by mass to 100 parts by mass of solvent with respect to 1 part by mass of the alkyl group-containing PC compound. It is preferable. In particular, in consideration of economy, the amount of the solvent used is more preferably 1 part by mass to 10 parts by mass with respect to 1 part by mass of the alkyl group-containing PC compound.
- the oxidizing agent used in step B3 is not particularly limited as long as it can convert an alkyl group into a carboxyl group.
- the oxidizing agent is preferably a strong oxidizing agent such as permanganate from the viewpoint of reaction rate, and potassium permanganate is more preferable in view of availability.
- the amount of the oxidizing agent to be used is not particularly limited, but is preferably 1 to 10 molar equivalents relative to the alkyl group-containing PC compound. In consideration of economic efficiency and environmental load, 1 to 3 molar equivalents. More preferably.
- the reaction temperature is not particularly limited, but it is preferable to carry out the reaction under reflux near the boiling point of the solvent from the viewpoint of the reaction rate.
- the reaction time in step B3 is not particularly limited, but can usually be 1 hour to 8 hours.
- X is hydroxysuccinimide or hydroxysulfosuccinimide sodium sulfate (hereinafter abbreviated as NHS form) having a structure represented by the formula (2)
- X obtained above is a carboxylic acid or a salt. It can be obtained by further performing the following step C on the carboxyl group-containing PC compound.
- step C N-hydroxysuccinimide or sodium N-hydroxysuccinimide sulfate is condensed with a carboxyl group-containing PC compound (X is a carboxylic acid or salt) obtained in steps A3 and B3 using a condensing agent.
- X is a carboxylic acid or salt
- Step C can be performed in the presence of a solvent.
- the solvent an aprotic solvent is preferable.
- the aprotic solvent examples include nitriles such as acetonitrile and benzonitrile, ketones such as acetone and methyl ethyl ketone, amides such as dimethylformamide, sulfoxides such as dimethyl sulfoxide, esters such as ethyl acetate and isopropyl acetate, Examples thereof include ethers such as tetrahydrofuran and 1,4-dioxane, and chlorinated organic solvents such as chloroform and dichloromethane.
- the solvent is preferably acetonitrile or dimethylformamide.
- the amount of solvent used is not particularly limited, but from the viewpoint of temperature control and inhibiting side reactions, the solvent is preferably 1 part by mass to 100 parts by mass with respect to 1 part by mass of the carboxyl group-containing PC compound. In particular, in consideration of economy, the amount of the solvent used is more preferably 1 part by mass to 10 parts by mass with respect to 1 part by mass of the carboxyl group-containing PC compound.
- the reaction temperature is not particularly limited, but can usually be 0 ° C. to 50 ° C.
- the reaction time in Step C is not particularly limited, but can usually be 8 hours to 96 hours.
- the condensing agent used in Step C examples include 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride, N, N′-diisopropylcarbodiimide, 1,3-dicyclohexylcarbodiimide, and the like.
- the condensing agent is preferably 1,3-dicyclohexylcarbodiimide.
- the amount of the condensing agent used can usually be 1 to 5 molar equivalents relative to the carboxyl group-containing PC compound.
- the amount of N-hydroxysuccinimide or sodium N-hydroxysuccinimide sulfate used can usually be 1 to 5 molar equivalents relative to the carboxyl group-containing PC compound.
- the phosphorylcholine group-containing compound of the present invention can be reacted with an amino acid amine site of a protein, peptide, or amino acid to form an amide bond, thereby forming a phosphorylcholine-protein complex, phosphorylcholine-peptide complex, or phosphorylcholine, respectively.
- -Amino acid complexes can be obtained.
- proteins include human serum albumin (HSA), bovine serum albumin (BSA), ovalbumin (OVA), keyhole limpet hemocyanin ( KLH), tri-gamma globulin (CGG), diphtheria toxoid, protein D and the like can be used.
- HSA human serum albumin
- BSA bovine serum albumin
- OVA ovalbumin
- KLH keyhole limpet hemocyanin
- CGG tri-gamma globulin
- diphtheria toxoid protein D and the like
- the reaction temperature, reaction time, and pH when synthesizing the PC-protein complex are not particularly limited as long as the protein does not decompose or denature.
- the reaction temperature when the reaction is carried out in a buffered aqueous solution at atmospheric pressure is usually 0 ° C. to 100 ° C., preferably 20 ° C. to 60 ° C.
- the reaction time is usually 1 second to 1 week, and preferably 1 hour to 3 days.
- the pH is usually 2 to 12, and preferably 5 to 9.
- a dialysis membrane For purification of the PC-protein complex, for example, a dialysis membrane can be used.
- a buffer aqueous solution used for synthesis and dialysis purification a buffer aqueous solution used in the biochemical field such as a phosphate buffer, a borate buffer, and a carbonate buffer can be used.
- the salt concentration of the buffered aqueous solution is usually 0.0001 mol / L to 10 mol / L, preferably 0.01 mol / L to 1 mol / L.
- oligopeptides include alanine, arginine, asparagine, aspartic acid, cysteine, glutamine, glutamic acid, glycine, histidine, isoleucine, leucine, lysine, Oligopeptides to which 2 to 10 amino acids consisting of any combination selected from methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine are bound can be used.
- the reaction temperature, reaction time, and pH for synthesizing the PC-peptide complex are not particularly limited as long as the oligopeptide does not decompose or denature.
- the reaction temperature when the reaction is carried out in a buffered aqueous solution at atmospheric pressure is usually 0 ° C. to 100 ° C., preferably 20 ° C. to 60 ° C.
- the reaction time is usually 1 second to 1 week, and preferably 1 hour to 3 days.
- the pH is usually 2 to 12, and preferably 5 to 9.
- amino acids include alanine, arginine, asparagine, aspartic acid, cysteine, glutamine, glutamic acid, glycine, histidine, isoleucine, leucine, lysine, methionine. , Phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine can be used.
- Examples of the method for synthesizing the PC-amino acid complex include a method in which a coupling reaction is performed using a condensing agent in water or a buffer solution.
- the condensing agent is not particularly limited, and for example, ethyldimethylaminopropylcarbodiimide hydrochloride having high water solubility can be used.
- the reaction temperature, reaction time, and pH when synthesizing the PC-amino acid complex are not particularly limited as long as the amino acid is not decomposed.
- the reaction temperature when the reaction is carried out in a buffered aqueous solution at atmospheric pressure is usually 0 ° C. to 100 ° C., preferably 20 ° C. to 60 ° C.
- the reaction time is usually 1 second to 1 week, and preferably 1 hour to 3 days.
- the pH is usually 2 to 12, and preferably 5 to 9.
- the PC-amino acid complex can be used as a raw material for obtaining a PC-protein complex or PC-peptide complex by binding to another oligopeptide or protein.
- FIG. 1 shows the 1 H NMR spectrum of 4-methoxycarbonylphenylphosphorylcholine obtained as described above
- FIG. 2 shows the 31 P NMR spectrum
- FIG. 3 shows the MS spectrum of 4-methoxycarbonylphenylphosphorylcholine obtained as described above.
- FIG. 4 shows the 1 H NMR spectrum of 4-carboxyphenylphosphorylcholine obtained as described above
- FIG. 5 shows the 31 P NMR spectrum
- FIG. 6 shows the MS spectrum of 4-carboxyphenylphosphorylcholine obtained as described above.
- Example a1-3 ⁇ Synthesis of 4-carboxyphenylphosphorylcholine by hydrolysis (step A3, NaOH method)> 10 g of 4-methoxycarbonylphenylphosphorylcholine obtained above was dissolved in 90 g of distilled water, 1.2 g of sodium hydroxide was added, and the mixture was stirred at 25 ° C. for 2 hours. Thereafter, the reaction solution was neutralized with 3.6 g of concentrated hydrochloric acid, and concentrated to dryness with an evaporator. The obtained solid was purified by column and the solvent was distilled off to obtain 8.5 g of solid.
- FIG. 7 shows a 1 H NMR spectrum of 4-methylphenylphosphorylcholine obtained as described above
- FIG. 8 shows a 31 P NMR spectrum
- FIG. 9 shows the MS spectrum of 4-methylphenylphosphorylcholine obtained as described above.
- step B3 ⁇ Synthesis of 4-carboxyphenylphosphorylcholine by oxidation (step B3, permanganate method)> 4 g of 4-methylphenylphosphorylcholine obtained above was dissolved in 45 g of distilled water, and then 6.1 g of potassium permanganate was added. This solution was heated to 100 ° C. and reacted under reflux for 3 hours. After cooling to 25 ° C., insoluble matters were filtered off, and 4 g of 35% hydrochloric acid was added to the resulting solution.
- FIG. 10 shows the 1 H NMR spectrum of 4-carboxyphenylphosphorylcholine obtained as described above, and FIG. 11 shows the 31 P NMR spectrum.
- FIG. 12 shows the MS spectrum of 4-carboxyphenylphosphorylcholine obtained as described above.
- Example a2-1 ⁇ Synthesis of PC-amino acid complex> First, morpholinoethanesulfonic acid hydrate (MES, manufactured by Sigma-Aldrich) was dissolved in purified water to prepare a 0.1 M MES buffer solution. Next, 50 mg of 4-carboxyphenylphosphorylcholine synthesized in Example a1-1, 50 mg of phenylalanine and 25 mg of ethyldimethylaminopropylcarbodiimide hydrochloride (manufactured by Pierce Biotechnologies) as a condensing agent are dissolved in 10 mL of 0.1 M MES buffer solution. By stirring at 25 ° C. for 24 hours, a PC-phenylalanine complex having a structure represented by the formula (8) was obtained.
- MES morpholinoethanesulfonic acid hydrate
- FIG. 13 shows an HPLC chromatogram of the solution before the stirring for 24 hours (before the reaction) in the synthesis of the PC-amino acid complex.
- FIG. 14 shows an HPLC chromatogram of the solution after the stirring for 24 hours (after the reaction). Represents a gram. From comparison between FIGS. 13 and 14, it was confirmed that the peak of 4-carboxyphenylphosphorylcholine disappeared and a new peak appeared.
- Example a2-2 ⁇ Synthesis of PC-protein complex> 4 mg of 4-carboxyphenylphosphorylcholine obtained in Example a1-1, 4 mg of bovine serum albumin (BSA, Sigma-Aldrich) and 2 mg of ethyldimethylaminopropylcarbodiimide hydrochloride (Tokyo Chemical Industry Co., Ltd.) as a condensing agent Dissolved in 1.6 mL of 0.1 M MES buffer solution. This solution was stirred at 25 ° C. for 2 hours, and then purified by dialysis in phosphate buffered saline (PBS) at pH 7.4 at 4 ° C., so that the PC-protein complex (PC-BSA) was obtained. Obtained.
- BSA bovine serum albumin
- PC-BSA phosphate buffered saline
- FIG. 16 shows the 1H NMR spectrum of 4-carboxyphenylphosphorylcholine succinimidyl obtained as described above, and FIG. 17 shows the 31P NMR spectrum.
- FIG. 18 shows the MS spectrum of 4-carboxyphenylphosphorylcholine succinimidyl.
- Example b2 ⁇ Synthesis of PC-protein complex> 20 mg of 4-carboxyphenylphosphorylcholine succinimidyl obtained in Example b1, 8 mg of bovine serum albumin (BSA, Sigma-Aldrich) and 8 mg of sodium bicarbonate were dissolved in 2 mL of distilled water. This solution was stirred at 25 ° C. for 24 hours, and then purified by dialysis in phosphate buffered saline (PBS) at pH 7.4 at 4 ° C. to obtain a PC-protein complex (PC-BSA).
- PBS phosphate buffered saline
- PC-BSA or BSA obtained in Examples a2-2 and b2 was dissolved in a carbonate / bicarbonate buffer solution (manufactured by Sigma-Aldrich), and the concentration was adjusted to 5 ⁇ L / mL. These solutions were dispensed into a 96-well microtiter plate (manufactured by Dynatech) at 50 ⁇ L / well and kept at 4 ° C. for 16 hours. Next, the plate was washed with PBS to which Tween 20 having a concentration of 0.05% was added, and then 25% Block Ace was dispensed at 200 ⁇ L / well and kept at 36 ° C. for 1 hour.
- a carbonate / bicarbonate buffer solution manufactured by Sigma-Aldrich
- the plate was washed with PBS to which Tween 20 having a concentration of 0.05% was added, the sample was injected at 50 ⁇ L / well, and held at 25 ° C. for 1 hour.
- the plate was washed with PBS added with Tween 20 at a concentration of 0.05%, and a horseradish peroxidase (HRP) -labeled goat anti-human IgA antibody (manufactured by Southern Biotechnology Associates) 2000-fold diluted product at 50 ⁇ L / well. Poured and held at 25 ° C. for 1 hour.
- HRP horseradish peroxidase
- the plate was washed with PBS supplemented with 0.05% Tween 20, and HRP substrate solution was dispensed at 100 ⁇ L / well and reacted at 25 ° C. for 15 minutes. After 15 minutes, 100 ⁇ L / well of dilute sulfuric acid was added to stop the reaction, and the absorbance at 450 nm (OD 450 ) was measured.
- Table 1 shows the measurement results of the anti-PC antibody titer of PC-BSA (Example a2-2) relating to the PC group-containing compound in which X is a hydrogen atom or a monovalent cation residue.
- Table 2 shows the measurement results of the anti-PC antibody titer of PC-BSA (Example b2) relating to the PC group-containing compound in which X is a hydroxysuccinimide group.
- Comparative Example a1 is a comparative example of a PC group-containing compound in which X of the present invention is a hydrogen atom or a monovalent cation residue.
- a compound having a structure represented by the formula (11) was synthesized according to the method described in International Publication No. 2004/074298.
- Comparative example b1 is a comparative example of a PC group-containing compound in which X of the present invention is a hydroxysuccinimide group.
- a compound having a structure represented by the formula (11) was synthesized according to the method described in International Publication No. 2004/074298. 20 mg of the compound having the structure represented by the formula (11) thus obtained, 8 mg of bovine serum albumin (BSA, Sigma-Aldrich) and 8 mg of sodium bicarbonate were dissolved in 2 mL of distilled water. Although this solution was stirred at 25 ° C. for 24 hours, the product was in a gel form and could not be dissolved in a 0.1 M MES buffer solution used for measurement of the anti-PC antibody titer.
- BSA bovine serum albumin
- Comparative example b2 is a comparative example of a PC group-containing compound in which X of the present invention is a hydroxysuccinimide group.
- a compound having a structure represented by the formula (11) was synthesized according to the method described in International Publication No. 2004/074298. 5.0 g of the obtained compound having the structure represented by the formula (11) and 6.0 g of N-hydroxysuccinimide were added to 35.0 g of DMF. This solution was kept at 25 ° C., 13.6 g of 1,3-dicyclohexylcarbodiimide dissolved in 20 g of DMF was added, and the mixture was reacted at 25 ° C. for 72 hours. After the reaction, the solution was filtered to collect a solid and recrystallized with acetonitrile to obtain 4.4 g (yield 56%) of a compound having a structure represented by the formula (12) after drying under reduced pressure.
- An aromatic compound having a structure containing one carboxyl group and one PC group each having a structure represented by the formula (1) can be effectively used as a raw material for obtaining a PC-protein complex.
- the obtained PC-protein complex, PC-peptide complex, or PC-amino acid complex can be used as a PC antigen or a raw material for producing PC antigen.
- the obtained PC antigen can be effectively used as a raw material for PC antibody production in the manufacture of pharmaceuticals containing PC antibodies.
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Abstract
Description
すなわち、本発明は下記の〔1〕~〔4〕である。
(Xは水素原子または1価のカチオン残基、もしくは下記の式(2)で表される構造を示す。)
(Yは水素原子またはSO3Naを示す。)
(Xは水素原子または1価のカチオン残基を示す。)
(Xは水素原子または1価のカチオン残基を示す。)
本発明のホスホリルコリン基含有化合物は、下記の式(1)で表される構造を有する。
さらに、Xが前記の(2)式で表される構造を有するヒドロキシスクシンイミド体であるとき、活性カルボキシル基としてアミド化反応を有利に進行させ、PC複合体を導くのにより有利となる。ヒドロキシスクシンイミドは、アミド化後速やかに脱離する。また、式(1)中の-COOX基は、ベンゼン環上のいずれかの炭素上に結合しているが、ホスホリルコリン基に対して、パラ-位で結合していることが好ましい。
本発明のPC基含有化合物は、次の製造方法1または2により製造することができる。
・製造方法1:
下記の式(3)で表される構造を有する化合物を、塩基性化合物を用いて加水分解することにより、カルボキシル基を有する式(1)で表される構造を有する化合物を生成する。
下記の式(4)で表される構造を有する化合物を、酸化剤を用いて酸化することにより、カルボキシル基を有する式(1)で表される構造を有する化合物を生成する。
PC基含有化合物の製造方法1は、具体的には、次の工程A1~A3を含む。
工程A1:カルボン酸エステル含有フェノール性化合物と2-クロロ-2-オキソ-1,3,2-ジオキサホスホラン(COP)とを、溶媒中で脱塩素化剤を用い反応させることにより、カルボン酸エステル含有オキサホスホラン(OP)化合物を生成する。
工程A2:工程A1で得られたカルボン酸エステル含有OP化合物にトリメチルアミンを反応させることにより、カルボン酸エステル含有PC化合物を生成する。
工程A3:工程A2で得られたカルボン酸エステル含有PC化合物を、塩基性化合物存在下、水中でエステルを加水分解することにより、カルボキシル基を有する式(1)で表される構造を有する化合物を生成する。
工程A1は、カルボン酸エステル含有フェノール性化合物とCOPとを、溶媒中で脱塩素化剤を用いて反応させることにより、カルボン酸エステル含有OP化合物を生成する工程である。上記カルボン酸エステル含有フェノール性化合物としては、例えば、オキシ安息香酸エステルのようなベンゼン核に1個のカルボン酸エステルが結合した構造の化合物を用いることができ、また、オルト、メタ、パラ、いずれの位置異性体でも用いることができる。上記オキシ安息香酸エステルとしては、例えば、メチルエステル型(ヒドロキシ安息香酸メチル)、エチルエステル型(ヒドロキシ安息香酸エチル)、プロピルエステル型(ヒドロキシ安息香酸プロピル)、ブチルエステル型(ヒドロキシ安息香酸ブチル)、ペンチルエステル型(ヒドロキシ安息香酸ペンチル)、ヘキシルエステル型(ヒドロキシ安息香酸ヘキシル)、ベンジルエステル型(ヒドロキシ安息香酸ベンジル)等が挙げられる。さらに、上記オキシ安息香酸エステルは、入手性や経済性から、例えば、パラヒドロキシ安息香酸メチル、パラヒドロキシ安息香酸エチル、パラヒドロキシ安息香酸プロピル、パラヒドロキシ安息香酸ブチル、パラヒドロキシ安息香酸ベンジル等のパラオキシ安息香酸エステルであることが好ましい。
工程A2は、工程A1で得られたカルボン酸エステル含有OP化合物にトリメチルアミンを反応させることにより、カルボン酸エステル含有PC化合物を生成する工程である。工程A2は、溶媒の存在下で行うことができる。当該溶媒としては、非プロトン性溶媒が好ましい。非プロトン性溶媒としては、例えば、アセトニトリル等のニトリル類、アセトン、メチルエチルケトン等のケトン類、ジメチルホルムアミド等のアミド類、酢酸エチル、酢酸イソプロピル等のエステル類、テトラヒドロフラン等のエーテル類、クロロホルム、ジクロロメタン等の塩素系有機溶媒等が挙げられる。工程A2において、溶媒の使用量は特に限定されないが、反応時の温度制御や副反応を制御といった観点から、カルボン酸エステル含有OP化合物1質量部に対して、溶媒1質量部~100質量部であることが好ましい。特に、経済性を考慮すると、溶媒の使用量は、カルボン酸エステル含有OP化合物1質量部に対して、溶媒1質量部~20質量部であることがさらに好ましい。
工程A3は、工程A2で得られたカルボン酸エステル含有PC化合物を、塩基性化合物存在下、水中でエステルを加水分解することにより、カルボキシル基含有PC化合物を合成する工程である。工程A3は、溶媒の存在下で行うことができる。当該溶媒は、通常水のみまたは含水有機溶媒であり、水のみであることが好ましい。工程A3において、溶媒の使用量は特に限定されないが、反応時の温度制御や副反応を制御といった観点から、カルボン酸エステル含有PC化合物1質量部に対して、溶媒1質量部~100質量部であることが好ましい。特に、経済性を考慮すると、溶媒の使用量は、カルボン酸エステル含有PC化合物1質量部に対して、溶媒1質量部~20質量部であることがさらに好ましい。
PC基含有化合物の製造方法2は、具体的には、次の工程B1~B3を含む。
工程B1:アルキル基含有フェノール性化合物とCOPとを、溶媒中で脱塩素化剤を用い反応させることにより、アルキル基含有OP化合物を生成する。
工程B2:工程B1で得られたアルキル基含有OP化合物にトリメチルアミンを反応させることにより、アルキル基含有PC化合物を生成する。
工程B3:工程B2で得られたアルキル基含有PC化合物を、酸化剤を用いて酸化することにより、カルボキシル基を有する式(1)で表される構造を有する化合物を生成する。
工程B1は、アルキル基含有フェノール性化合物とCOPとを、溶媒中で脱塩素化剤を用いて反応させることにより、アルキル基含有OP化合物を生成する工程である。 上記アルキル基含有フェノール性化合物としては、例えばクレゾ-ルのような、ベンゼン核に1個のアルキル基が結合した構造の化合物を用いることができ、また、オルト、メタ、パラ、いずれの位置異性体でも用いることができる。
工程B2は、工程B1で得られたアルキル基含有OP化合物にトリメチルアミンを反応させることにより、アルキル基含有PC化合物を生成する工程である。工程B2は、溶媒の存在下で行うことができる。当該溶媒としては、非プロトン性溶媒が好ましい。非プロトン性溶媒としては、例えば、アセトニトリル等のニトリル類、アセトン、メチルエチルケトン等のケトン類、ジメチルホルムアミド等のアミド類、酢酸エチル、酢酸イソプロピル等のエステル類、テトラヒドロフラン等のエーテル類、クロロホルム、ジクロロメタン等の塩素系有機溶媒等が挙げられる。工程B2において、溶媒の使用量は特に限定されないが、反応時の温度制御や副反応の制御性といった観点から、アルキル基含有OP化合物1質量部に対して、溶媒1質量部~100質量部であることが好ましい。特に、経済性を考慮すると、溶媒の使用量は、アルキル基含有OP化合物1質量部に対して、溶媒1質量部~20質量部であることがさらに好ましい。
工程B3は、工程B2で得られたアルキル基含有PC化合物を、酸化剤を用いて酸化することにより、カルボキシル基含有PC化合物を生成する工程である。工程B3は、溶媒の存在下で行うことができる。当該溶媒としては、特に限定されないが、プロトン性溶媒であることが好ましく、特に、水であることがさらに好ましい。工程B3において、溶媒の使用量は特に限定されないが、反応時の温度制御や副反応の制御といった観点から、アルキル基含有PC化合物1質量部に対して、溶媒1質量部~100質量部であることが好ましい。特に、経済性を考慮すると、溶媒の使用量は、アルキル基含有PC化合物1質量部に対して、溶媒1質量部~10質量部であることがさらに好ましい。
工程Cは、工程A3、B3にて得られたカルボキシル基含有PC化合物(Xがカルボン酸または塩)に縮合剤を用いて、N-ヒドロキシスクシンイミドまたはN-ヒドロキシスクシンイミド硫酸ナトリウムを縮合することにより、NHS体を生成する工程である。工程Cは、溶媒の存在下で行うことができる。当該溶媒としては、非プロトン性溶媒が好ましい。非プロトン性溶媒としては、例えば、アセトニトリル、ベンゾニトリル等のニトリル類、アセトン、メチルエチルケトン等のケトン類、ジメチルホルムアミド等のアミド類、ジメチルスルホキシド等のスルホキシド類、酢酸エチル、酢酸イソプロピル等のエステル類、テトラヒドロフラン、1,4-ジオキサン等のエーテル類、クロロホルム、ジクロロメタン等の塩素系有機溶媒等が挙げられる。特に、溶解性や反応速度を考慮すると、溶媒はアセトニトリルまたはジメチルホルムアミドであることが好ましい。
以上の製造方法により、本発明のPC基含有化合物を効率よく製造することが可能となる。
本発明のホスホリルコリン基含有化合物は、蛋白質、ペプチド、またはアミノ酸のアミノ酸アミン部位と反応させてアミド結合させることにより、各々、ホスホリルコリン-蛋白複合体、ホスホリルコリン-ペプチド複合体、またはホスホリルコリン-アミノ酸複合体を得ることができる。
本発明のPC基含有化合物を用いてPC-蛋白複合体を合成する場合、蛋白質としては、ヒト血清アルブミン(HSA)、ウシ血清アルブミン(BSA)、卵白アルブミン(OVA)、キーホールリンペットヘモシアニン(KLH)、トリγグロブリン(CGG)、ジフテリアトキソイド、プロテインD等を用いることができる。
本発明のPC基含有化合物を用いてPC-ペプチド複合体を合成する場合、オリゴペプチドとしては、アラニン、アルギニン、アスパラギン、アスパラギン酸、システイン、グルタミン、グルタミン酸、グリシン、ヒスチジン、イソロイシン、ロイシン、リシン、メチオニン、フェニルアラニン、プロリン、セリン、トレオニン、トリプトファン、チロシン、バリンから選ばれる任意の組み合わせからなるアミノ酸2個~10個が結合したオリゴペプチドを用いることができる。
本発明のPC基含有化合物を用いてPC-アミノ酸複合体を合成する場合、アミノ酸としては、アラニン、アルギニン、アスパラギン、アスパラギン酸、システイン、グルタミン、グルタミン酸、グリシン、ヒスチジン、イソロイシン、ロイシン、リシン、メチオニン、フェニルアラニン、プロリン、セリン、トレオニン、トリプトファン、チロシン、バリンを用いることができる。
PC-アミノ酸複合体の合成方法としては、水または緩衝溶液中、縮合剤を用いて結合反応を行う方法が挙げられる。
上記縮合剤としては、特に限定されないが、例えば、水溶性の高いエチルジメチルアミノプロピルカルボジイミド塩酸塩を用いることができる。
<1H NMR測定>
日本電子株式会社製、商品名「JNM-AL400」を用い、溶媒:D2O、標準物質:HOD、試料濃度:10mg/g、積算回数:32回の条件で測定を行った。
日本電子株式会社製、商品名「JNM-AL400」を用い、溶媒:D2O、標準物質:H3PO4、試料濃度:10mg/g、積算回数:32回の条件で測定を行った。
Waters社製、商品名「Q-micro2695」を用い、試料濃度:100ppm、検出モード:ESI+、キャピラリー電圧:3.54V、コーン電圧:30V、イオン源ヒーター:120℃、脱溶媒ガス:350℃の条件で測定を行った。
カラムに、Waters社製、商品名「Atlantis T3 3μm 4.6×100mm」を用い、流速:0.9mL/min、温度:40℃、試料注入量:10μL、検出波長:254nm、移動相:0.1vol%トリフルオロ酢酸含有蒸留水/0.1vol%トリフルオロ酢酸含有アセトニトリル、グラジエント条件:蒸留水/アセトニトリル=100/0(0分),85/15(0分~20分),85/15(20分~30分)の条件で測定を行った。
モレキュラーデバイス社製、商品名「SpectraMax M3」を用い、450nmの吸光度(OD450)を測定した。
[実施例a1-1]
<カルボン酸エステル含有PC化合物の合成(工程A1、A2)>
4-ヒドロキシ安息香酸メチル20gにアセトニトリル160g、トリエチルアミン15gを加えて溶解させ、0℃に冷却した。その後、COP21gを滴下した。滴下終了後、0℃で5時間反応させ、生成したトリエチルアミン塩酸塩をろ過で除いた。得られたろ液に、アセトニトリル200gとトリメチルアミン12gとを加えた後、75℃で15時間反応させた。その後、60℃まで冷却し、窒素を吹き込みながら溶液量が約200mlになるまで濃縮した。濃縮後、溶液を25℃まで冷却し、析出した結晶をろ別、減圧乾燥することにより、反応中間体として式(5)で表される構造を有する4-メトキシカルボニルフェニルホスホリルコリンを35.2g(収率85%)得た。
1H NMR:δ=8.04ppm(d,2H,J=8.8:d),7.30ppm(d,2H,J=8.8:e),4.41ppm(brs,2H:c),3.91ppm(s,3H:f),3.68ppm(m,2H:b),3.18ppm(s,9H:a)
31P NMR:-4.59ppm(t,J=15.9)
MS:[M+H]+=317.91,[M+Na]+=340.01
上記により得られた4-メトキシカルボニルフェニルホスホリルコリン10gを蒸留水90gに溶解させ、DBUを5.0g加えて25℃にて3時間撹拌した。その後、濃塩酸3.6gを加えることにより反応液を中和し、エバポレーターで濃縮乾固した。得られた固体をエタノール50gで再結晶することにより、式(6)で表される構造を有する4-カルボキシフェニルホスホリルコリンの固体を9.0g(収率94%)得た。
31P NMR:-4.56ppm(t,J=15.9)
MS:[M+H]+=304.12
<加水分解による4-カルボキシフェニルホスホリルコリンの合成(工程A3、トリエチルアミン法)>
上記により得られた4-メトキシカルボニルフェニルホスホリルコリン5gを蒸留水45gに溶解させ、トリエチルアミンを3.19g加え、還流下4時間反応させた。反応終了後、室温まで冷却し、濃塩酸3.4gを加えることにより反応液を中和し、ロータリーエバポレーターで減圧濃縮した。得られた残留物に、2-プロパノール50gを添加して減圧濃縮する操作を2回行い、さらに2-プロパノール50gを加え、-10℃で終夜攪拌して結晶を析出させた。溶液を加圧ろ過し、得られた結晶を減圧乾燥することにより、固体を4.0g得た。
1H NMR:δ=8.06ppm(d,2H,J=8.8),7.33ppm(d,2H,J=8.8),4.43ppm(brs,2H),3.70ppm(m,2H),3.19ppm(s,9H)
<加水分解による4-カルボキシフェニルホスホリルコリンの合成(工程A3、NaOH法)>
上記により得られた4-メトキシカルボニルフェニルホスホリルコリン10gを蒸留水90gに溶解させ、水酸化ナトリウムを1.2g加え、25℃にて2時間撹拌した。その後、濃塩酸3.6gで反応液を中和し、エバポレーターで濃縮乾固した。得られた固体をカラム精製後、溶媒を留去することにより、固体8.5gを得た。
1H NMR:δ=8.06ppm(d,2H,J=8.8),7.33ppm(d,2H,J=8.8),4.43ppm(brs,2H),3.70ppm(m,2H),3.19ppm(s,9H)
<アルキル基含有PC化合物の合成(工程B1、B2)>
p-クレゾール20.0gに、アセトニトリル100gとジイソプロピルアミン22.5gとを加えて溶解させ、0℃に冷却した。その後、COP31.6gを滴下した。滴下終了後、0℃にて3時間反応させ、生成したジイソプロピルアミン塩酸塩をろ過で除いた。得られたろ液に、アセトニトリル100gとトリメチルアミン16.4gとを加え、75℃で15時間反応させた。その後、60℃まで冷却し、窒素を吹き込みながら溶液量が約200mlになるまで濃縮し、25℃まで冷却した。析出した結晶をろ別し、アセトニトリル100gで洗浄後にろ過、減圧乾燥することにより、反応中間体として式(7)で表される構造を有する4-メチルフェニルホスホリルコリンの固体を32.8g(収率65%)得た。
1H NMR:δ=7.25ppm(d,2H,J=7.8:b),7.11ppm(d,2H,J=8.3:c),4.38ppm(brs,2H:e),3.65ppm(m,2H:d),3.16ppm(s,9H:f),2.32ppm(s,3H:a)
31P NMR:-3.70ppm(t,J=15.9)
MS:[M+H]+=296.23
上記により得られた4-メチルフェニルホスホリルコリン5gを蒸留水45gに溶解させ、次いで過マンガン酸カリウム6.1gを加えた。この溶液を100℃に加熱し、還流下3時間反応させた。25℃に冷却後、不溶物をろ別し、得られた溶液に35%塩酸4gを加えた。その後、溶液をエバポレーターにて減圧乾固し、得られた固体をカラム精製後、溶媒を留去することにより4-カルボキシフェニルホスホリルコリンの固体を4.4g(収率80%)得た。
1H NMR:δ=8.06ppm(d,2H,J=8.8:d),7.33ppm(d,2H,J=8.8:e),4.43ppm(brs,2H:b),3.70ppm(m,2H:c),3.19ppm(s,9H:a)
31P NMR:-4.56ppm(t,J=15.9)
MS:[M+H]+=304.12,[M+NH4]+=320.13
<PC-アミノ酸複合体の合成>
まず、モルホリノエタンスルホン酸水和物(MES,Sigma-Aldrich社製)を精製水に溶解し、0.1M MES緩衝溶液を調製した。次に、実施例a1-1にて合成した4-カルボキシフェニルホスホリルコリン50mg、フェニルアラニン50mgおよび縮合剤としてエチルジメチルアミノプロピルカルボジイミド塩酸塩(Pierce Biotechnologies社製)25mgを0.1M MES緩衝溶液10mLに溶解させ、25℃にて24時間撹拌することにより、式(8)で表される構造を有するPC-フェニルアラニン複合体を得た。
<PC-蛋白複合体の合成>
実施例a1-1にて得られた4-カルボキシフェニルホスホリルコリン4mg、ウシ血清アルブミン(BSA、Sigma-Aldrich社製)4mgおよび縮合剤としてエチルジメチルアミノプロピルカルボジイミド塩酸塩(東京化成工業株式会社)2mgを0.1M MES緩衝溶液1.6mLに溶解させた。この溶液を、25℃にて2時間攪拌した後、pH7.4のリン酸緩衝生理食塩水(PBS)中、4℃で透析精製を行うことにより、PC-蛋白複合体(PC-BSA)を得た。
<4-カルボキシフェニルホスホリルコリンスクシンイミジルの合成(工程C)>
実施例a1-1にて得られた4-カルボキシフェニルホスホリルコリン5.0gとN-ヒドロキシスクシンイミド3.0gとを、N,N-ジメチルホルムアミド(DMF)35gに懸濁させた。この溶液を25℃に保ち、10gのDMFに溶解させた1,3-ジシクロヘキシルカルボジイミド6.8gを加え、25℃にて72時間反応させた。反応後、溶液をろ過して固体を回収し、アセトニトリル160gで再結晶することにより、減圧乾燥後に式(9)で表される構造を有する4-カルボキシフェニルホスホリルコリンスクシンイミジルを4.5g(収率68%)得た。
1H NMR:δ=8.23ppm(d,2H,J=8.8:e),7.42ppm(d,2H,J=8.3:d),4.45ppm(brs,2H:b),3.72ppm(m,2H:c),3.22ppm(s,9H:a),3.04ppm(s,4H:f)
31P NMR:-4.96ppm(t,J=15.9)
MS:[M+H]+=400.99、[M+Na]+=423.03
<PC-蛋白複合体の合成>
実施例b1にて得られた4-カルボキシフェニルホスホリルコリンスクシンイミジル20mg、ウシ血清アルブミン(BSA、Sigma-Aldrich社製)8mgおよび炭酸水素ナトリウム8mgを蒸留水2mLに溶解させた。この溶液を25℃、24時間攪拌した後、pH7.4のリン酸緩衝生理食塩水(PBS)中、4℃で透析精製を行うことにより、PC-蛋白複合体(PC-BSA)を得た。
<検体の調製>
年齢20歳台~40歳台の健常な被験者5名から唾液を採取し、10%ブロックエース(大日本住友製薬製)を用いて16倍に希釈した溶液を検体とした。
まず、カーボネート/バイカーボネート緩衝溶液(Sigma-Aldrich社製)に、上記実施例a2-2、b2にてそれぞれ得られたPC-BSAまたはBSAを溶解させ、濃度5μL/mLに調整した。これらの溶液を96ウェルマイクロタイタープレート(ダイナテック社製)に50μL/ウェル分注し、4℃にて16時間保持した。次に、濃度0.05%のTween20を添加したPBSを用いてプレートを洗浄した後、25%ブロックエースを200μL/ウェル分注し、36℃にて1時間保持した。次に、濃度0.05%のTween20を添加したPBSを用いてプレートを洗浄し、検体を50μL/ウェル注入し、25℃にて1時間保持した。次に、濃度0.05%のTween20を添加したPBSを用いてプレートを洗浄し、西洋ワサビペルオキシダーゼ(HRP)標識ヤギ抗ヒトIgA抗体(Southern Biotechnology Associates社製)2000倍希釈品を50μL/ウェル分注し、25℃にて1時間保持した。次に、濃度0.05%のTween20を添加したPBSを用いてプレートを洗浄し、HRP基質液を100μL/ウェル分注し、25℃にて15分間反応した。15分後、希硫酸を100μL/ウェル添加して反応を停止した後、450nmの吸光度(OD450)を測定した。
PC-BSAを吸着させたプレートから得られた吸光度(anti-PC-BSA(OD450))と、陰性対象としてBSAを吸着させたプレートから得られた吸光度(anti-BSA(OD450))との差分(anti-PC(OD450))を式(10)により算出した。測定毎に検量線を作成し、求めたanti-PC(OD450)の値から各検体の抗PC抗体価(μg等量/mL)を算出した。
anti-PC(OD450)=anti-PC-BSA(OD450)-anti-BSA(OD450)
…(10)
表1は、Xが水素原子または1価のカチオン残基であるPC基含有化合物に係るPC-BSA(実施例a2-2)の抗PC抗体価の測定結果を示している。
[比較例a1]
比較例a1は、本発明のXが水素原子または1価のカチオン残基であるPC基含有化合物の比較例である。
国際公開第2004/074298号明細書に記載の方法に従い、式(11)で表される構造を有する化合物を合成した。得られた式(11)で表される構造を有する化合物4mg、ウシ血清アルブミン(BSA、Sigma-Aldrich社製)4mgおよび縮合剤としてエチルジメチルアミノプロピルカルボジイミド塩酸塩(東京化成工業社製)2mgを0.1M MES緩衝溶液1.6mLに溶解させた。この溶液を25℃で攪拌し、PC-蛋白複合体の合成を試みたが、生成物はゲル状であり、抗PC抗体価の測定に用いる0.1M,MES緩衝溶液に溶解させることができなかった。
比較例b1は、本発明のXがヒドロキシスクシンイミド基であるPC基含有化合物の比較例である。
国際公開第2004/074298号明細書に記載の方法に従い、式(11)で表される構造を有する化合物を合成した。得られた式(11)で表される構造を有する化合物20mg、ウシ血清アルブミン(BSA、Sigma-Aldrich社製)8mgおよび炭酸水素ナトリウム8mgを蒸留水2mLに溶解させた。この溶液を25℃、24時間攪拌したが、生成物はゲル状であり、抗PC抗体価の測定に用いる0.1M,MES緩衝溶液に溶解させることができなかった。
比較例b2は、本発明のXがヒドロキシスクシンイミド基であるPC基含有化合物の比較例である。
国際公開第2004/074298号明細書に記載の方法に従い、式(11)で表される構造を有する化合物を合成した。得られた式(11)で表される構造を有する化合物5.0gとN-ヒドロキシスクシンイミド6.0gとを、DMF35.0gに加えた。この溶液を25℃に保ち、20gのDMFに溶解させた1,3-ジシクロヘキシルカルボジイミド13.6gを加え、25℃にて72時間反応させた。反応後、溶液をろ過して固体を回収し、アセトニトリルで再結晶を行うことにより、減圧乾燥後に式(12)で表される構造を有する化合物を4.4g(収率56%)得た。
Claims (4)
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| JP2016554073A JP6547755B2 (ja) | 2014-10-15 | 2015-10-13 | ホスホリルコリン基含有化合物およびホスホリルコリン複合体 |
| US15/519,746 US9850266B2 (en) | 2014-10-15 | 2015-10-13 | Phosphorylcholine group-containing compound and phosphorylcholine complex |
| EP15850193.2A EP3208275B1 (en) | 2014-10-15 | 2015-10-13 | Phosphorylcholine group-containing compound and phosphorylcholine complex |
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| FR1551060A (ja) * | 1967-09-21 | 1968-12-27 | ||
| US5455032A (en) * | 1993-07-29 | 1995-10-03 | The United States Of America As Represented By The Department Of Health And Human Services | Use of phosphocholine hapten conjugates in vaccines |
| WO2003036297A1 (en) * | 2001-09-27 | 2003-05-01 | Tridelta Development Limited | Non-immunological assays for the detection and determination of c-reactive protein |
| WO2004074298A1 (ja) * | 2003-02-18 | 2004-09-02 | Tokai University | ホスホリルコリン基を有する化合物、その重合体ならびにその製造方法 |
| US20080175852A1 (en) * | 2005-03-23 | 2008-07-24 | Rezanka Louis J | Synthesis of phosphocholine ester derivatives and conjugates thereof |
| WO2009128348A1 (ja) * | 2008-04-14 | 2009-10-22 | 和光純薬工業株式会社 | フェニルホスホリルコリン誘導体 |
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|---|---|---|---|---|
| US5830432A (en) * | 1997-03-31 | 1998-11-03 | Amur Pharmacuticals, Inc. | Phospholipid drug derivatives |
| AU3000800A (en) * | 1999-02-18 | 2000-09-04 | Supergen, Inc. | Phosphocholine linked prodrug derivatives |
| AU2005233361B2 (en) | 2004-04-15 | 2011-02-24 | Athera Biotechnologies Ab | Phosphorylcholine conjugates and corresponding antibodies |
| JP5013575B2 (ja) | 2005-10-28 | 2012-08-29 | 株式会社 資生堂 | 素材の表面処理方法 |
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| FR1551060A (ja) * | 1967-09-21 | 1968-12-27 | ||
| US5455032A (en) * | 1993-07-29 | 1995-10-03 | The United States Of America As Represented By The Department Of Health And Human Services | Use of phosphocholine hapten conjugates in vaccines |
| WO2003036297A1 (en) * | 2001-09-27 | 2003-05-01 | Tridelta Development Limited | Non-immunological assays for the detection and determination of c-reactive protein |
| WO2004074298A1 (ja) * | 2003-02-18 | 2004-09-02 | Tokai University | ホスホリルコリン基を有する化合物、その重合体ならびにその製造方法 |
| US20080175852A1 (en) * | 2005-03-23 | 2008-07-24 | Rezanka Louis J | Synthesis of phosphocholine ester derivatives and conjugates thereof |
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Cited By (2)
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| JP2020121960A (ja) * | 2019-01-31 | 2020-08-13 | 国立大学法人 鹿児島大学 | 経鼻粘膜ワクチン用アジュバント及びワクチン製剤 |
| JP7165327B2 (ja) | 2019-01-31 | 2022-11-04 | 国立大学法人 鹿児島大学 | 経鼻粘膜ワクチン用アジュバント |
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| JPWO2016060096A1 (ja) | 2017-08-31 |
| EP3208275A1 (en) | 2017-08-23 |
| EP3208275B1 (en) | 2019-01-09 |
| JP6547755B2 (ja) | 2019-07-24 |
| US9850266B2 (en) | 2017-12-26 |
| US20170240576A1 (en) | 2017-08-24 |
| EP3208275A4 (en) | 2018-06-06 |
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