WO2014017046A1 - 放射線障害の予防及び/又は治療剤 - Google Patents
放射線障害の予防及び/又は治療剤 Download PDFInfo
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- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
- A61K31/19—Carboxylic acids, e.g. valproic acid
- A61K31/195—Carboxylic acids, e.g. valproic acid having an amino group
- A61K31/197—Carboxylic acids, e.g. valproic acid having an amino group the amino and the carboxyl groups being attached to the same acyclic carbon chain, e.g. gamma-aminobutyric acid [GABA], beta-alanine, epsilon-aminocaproic acid or pantothenic acid
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/21—Esters, e.g. nitroglycerine, selenocyanates
- A61K31/215—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids
- A61K31/22—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids of acyclic acids, e.g. pravastatin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/21—Esters, e.g. nitroglycerine, selenocyanates
- A61K31/215—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids
- A61K31/235—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids having an aromatic ring attached to a carboxyl group
- A61K31/24—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids having an aromatic ring attached to a carboxyl group having an amino or nitro group
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/555—Heterocyclic compounds containing heavy metals, e.g. hemin, hematin, melarsoprol
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K33/00—Medicinal preparations containing inorganic active ingredients
- A61K33/24—Heavy metals; Compounds thereof
- A61K33/26—Iron; Compounds thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P39/00—General protective or antinoxious agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
Definitions
- the present invention relates to a preventive and / or therapeutic agent for radiation damage, and more particularly to a preventive and / or therapeutic agent for radiation damage containing 5-aminolevulinic acid (5-ALA) or a derivative thereof or a salt thereof.
- 5-aminolevulinic acid 5-ALA
- Radiation damage is a general term for physical damage and damage caused by exposure of organisms to radiation such as X-rays and gamma rays, and its causes are known to be radiation irradiation and radioactive contamination. Radiation damage includes early-onset radiation damage (acute radiation damage), which is an acute-stage symptom that appears immediately after radiation exposure within a few months, and radiation damage that appears several years to several decades after radiation exposure. There is a late-onset radiation injury (delayed radiation injury).
- the sensitivity of cells to radiation increases as cells divide actively, and cell regeneration systems such as hematopoietic organs are most susceptible.
- cell regeneration systems such as hematopoietic organs are most susceptible.
- 1 Gy gray
- symptoms of hangover similar to hangover such as nausea, vomiting, general malaise, and exposure to 1.5 Gy or more
- the most sensitive hematopoietic cells are affected, and the supply of white blood cells and platelets is interrupted, resulting in increased bleeding and decreased immunity. In severe cases, death occurs in about 30 to 60 days.
- the skin is sensitive to epithelial basal cells, and hair loss and temporary erythema are observed at 3 Gy or more, blistering is formed at 7 to 8 Gy, and ulcers are observed at 10 Gy or more.
- the former is intended to minimize the exposure itself to radiation by preventing the incorporation of the generated radioactive material, and the latter is intended to suppress the onset of symptoms due to the exposed radiation.
- administration of cytokine for promoting hematopoiesis or bone marrow transplantation is known. These methods are treatment methods for myelosuppression, which is one of the symptoms of radiation damage accumulated by the body or radiation damage caused by direct irradiation. Since bone marrow cells cannot perform normal division due to radiation damage, administration of cytokines such as G-CSF to the remaining normal cells promotes proliferation and differentiation of blood cells. In more severe cases, bone marrow cell transplantation may be performed.
- nitroprusside see Patent Document 1
- lactoferrin see Patent Document 2
- 6,10,14,18-tetramethyl-5,9,13,17-nonadecatetraene -2-one see Patent Document 3
- pyrazolone derivative see Patent Document 4
- growth factor SCF growth factor IL3, GM-CSF and IL6
- Patent Document 5 ( ⁇ ) -N, N′-propylenedinicotine Amide (see patent document 6), 13-oxygermylpropionic acid (see patent document 7), ⁇ -lapachone (see patent document 8), phosphorus derivative of alkaloid (see patent document 9), ⁇ -D-glucopyranosyl- ( 1 ⁇ 2) -L-ascorbic acid (see Patent Document 10) has been proposed.
- 5-ALA is known as an intermediate of the tetrapyrrole biosynthetic pathway widely present in animals, plants and fungi, and is usually biosynthesized from succinyl CoA and glycine by 5-aminolevulinic acid synthase.
- Photodynamic therapy or photodynamic therapy using 5-ALA (hereinafter also referred to as “ALA-PDT”) has been developed, and is attracting attention as a treatment method that is low in invasiveness and maintains QOL.
- the tumor diagnosis / treatment agents used have been reported.
- 5-ALA is also known to be useful as an agent for preventing or improving adult diseases, cancer and male infertility (see, for example, Patent Documents 11 to 13).
- An object of the present invention is to improve / alleviate a wide range of symptoms which have a new mechanism of action and which have no conventional therapeutic means, and can solve the following problems of preventive and / or therapeutic agents for radiation damage.
- An object of the present invention is to provide a preventive and / or therapeutic agent for radiation damage that can be alleviated and is highly safe for humans. [1] There was no preventive measure for the damage caused by low-dose continuous exposure. [2] There were no commonly used drugs for preventing side effects of radiation therapy. [3] Regarding therapeutic methods, protein preparations are difficult to ensure a certain quality and are expensive. Hematopoietic stem cell transplantation cannot be a universal treatment because there are not always matching donors. [4] With respect to treatment methods, conventional techniques can suppress damage to the bone marrow, but other treatment methods for symptoms such as inflammation, hair loss, and diarrhea have not been established.
- the present inventors considered that administration of 5-ALA could suppress inflammation caused by radiation. Then, when 5-ALA was actually administered to the irradiation model mouse, it was found that the survival rate caused by radiation damage can be improved and the weight loss can be improved, and that hematopoietic damage can be alleviated, and the present invention is completed. It came to.
- the present invention relates to [1] a preventive and / or therapeutic agent for radiation damage containing a compound represented by the following formula (I) or a salt thereof, but as another aspect, it is used for prevention and / or treatment of radiation damage. And a compound represented by the following formula (I) or a salt thereof.
- R 1 represents a hydrogen atom or an acyl group
- R 2 represents a hydrogen atom, a linear or branched alkyl group, a cycloalkyl group, an aryl group, or an aralkyl group).
- the present invention also provides [2] the agent for preventing and / or treating radiation damage according to [1] above, wherein R 1 and R 2 are hydrogen atoms, and [3] further containing an iron compound.
- the present invention provides [8] a method for preventing and / or treating radiation damage, which comprises administering to the subject the agent for preventing and / or treating radiation damage described in any of [1] to [7] above.
- a kit for preventing and / or treating radiation damage comprising a) a compound represented by the above formula (I) or a salt thereof; and b) an iron compound;
- radiation damage in a subject can be alleviated, reduced, protected, ameliorated, prevented and / or treated, and more specifically, an increase in survival rate and weight loss in a radiation-exposed subject are prevented.
- hematopoietic disorder which is one of the symptoms of radiation damage (promoting hematopoiesis), suppression of hair loss, improvement of skin deterioration, improvement of food intake and water consumption reduction, improvement of diarrhea, activity time It is possible to provide a highly safe preventive and / or therapeutic agent for radiation damage that can be expected not only to improve reduction but also to improve posture.
- FIG. 7 shows the results of analysis of cells collected from bone marrow, spleen, and thymus by a flow cytometer when 5-ALA hydrochloride or 5-ALA hydrochloride + SFC was administered to radiation-damaged mice irradiated with a radiation dose of 4.0 Gy.
- FIG. It is a figure which shows the result of having counted the number of erythrocyte progenitor cells EryI, EryII / III, and EryIV among the bone marrow cells of FIG. It is a figure which shows the result of having counted the number of erythrocyte progenitor cells EryIV among the spleen cells of FIG. Among the bone marrow cells in FIG.
- FIG. 4 is a graph showing the results of counting the number of monocytes, B cells, T cells, and CD11b + cells (lower row). It is a figure which shows the result of having counted the number of DN and DP among the thymocytes of FIG.
- the agent for preventing and / or treating radiation damage according to the present invention contains a compound represented by the above formula (I) or a salt thereof (hereinafter sometimes collectively referred to as “ALA”) as an active ingredient. If it is, it will not restrict
- the agent for preventing and / or treating radiation damage of the present invention can also be used as a pharmaceutical, a quasi-drug, a cosmetic, a food or drink, a feed, a feed, or a pet food.
- the method for preventing and / or treating radiation damage according to the present invention comprises administering the above-mentioned agent for preventing and / or treating radiation damage according to the present invention to subjects such as livestock, poultry and pets in addition to humans.
- the agent for preventing and / or treating radiation damage according to the present invention is preferably administered daily before and after irradiation, for example, 1 to 3 days before to 5 to 10 days after the irradiation.
- prevention and / or treatment of radiation damage includes reduction of radiation damage, improvement of radiation damage, reduction of radiation damage, and the radiation damage includes early-onset radiation damage and late-onset radiation damage. Includes sexual radiation damage.
- the kit for preventing and / or treating radiation damage of the present invention is not particularly limited as long as it is a kit that individually contains ALAs and iron compounds as active ingredients, in order to improve the survival rate, Those that can be used to improve (prevent) weight loss and to alleviate hematopoietic disorders are preferred.
- the method for preventing and / or treating the radiation damage according to the present invention using the kit for preventing and / or treating the radiation damage according to the present invention comprises: ⁇ It is characterized by being administered to subjects such as poultry and pets before and after irradiation.
- the combination of the preventive and / or therapeutic agent of the present invention includes the above-mentioned preventive and / or therapeutic agent for radiation injury of the present invention and the prevention of radiation injury other than the preventive and / or therapeutic agent of the present invention.
- Each formulation (component) of these combinations can be administered simultaneously or separately.
- Each combination (component) of these combinations can be administered daily before and after irradiation, for example, from 1 to 3 days before to 5 to 10 days after the irradiation day.
- 5-ALA is one of the amino acids also called ⁇ -aminolevulinic acid.
- R 1 in the formula (I) is a hydrogen atom or an acyl group
- R 2 in the formula (I) is a hydrogen atom, a linear or branched alkyl group, a cycloalkyl group, an aryl group
- compounds other than 5-ALA, which is an aralkyl group can be mentioned.
- acyl group in the formula (I) examples include linear or branched alkanoyl groups having 1 to 8 carbon atoms such as formyl, acetyl, propionyl, butyryl, isobutyryl, valeryl, isovaleryl, pivaloyl, hexanoyl, octanoyl, benzylcarbonyl group, etc. And aroyl groups having 7 to 14 carbon atoms such as benzoyl, 1-naphthoyl and 2-naphthoyl groups.
- alkyl group in the formula (I) examples include linear or branched groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, heptyl and octyl groups. Mention may be made of alkyl groups having 1 to 8 carbon atoms.
- the cycloalkyl group in the formula (I) may have a saturated or partially unsaturated bond such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclododecyl, 1-cyclohexenyl group, etc. And a cycloalkyl group having 3 to 8 carbon atoms.
- aryl group in the formula (I) examples include aryl groups having 6 to 14 carbon atoms such as phenyl, naphthyl, anthryl, and phenanthryl groups.
- the aryl moiety can be the same as the above aryl group, and the alkyl moiety can be the same as the above alkyl group, specifically, benzyl, phenethyl, phenylpropyl, phenylbutyl, benzhydryl.
- aralkyl groups having 7 to 15 carbon atoms such as trityl, naphthylmethyl, naphthylethyl group, and the like.
- R 1 is formyl, acetyl, propionyl, or butyryl group
- compound said R 2 is methyl, ethyl, propyl, butyl, compound pentyl group
- the R 1 and Preferred examples of the combination of R 2 include formyl and methyl, acetyl and methyl, propionyl and methyl, butyryl and methyl, formyl and ethyl, acetyl and ethyl, propionyl and ethyl, butyryl and ethyl, and the like.
- ALAs only need to act as active ingredients in the state of 5-ALA of formula (I) or a derivative thereof in vivo, and various salts, esters, or biological compounds for increasing solubility depending on the administration form. It can be administered as a prodrug (precursor) that is degraded by enzymes in the body.
- examples of salts of 5-ALA and its derivatives include pharmacologically acceptable acid addition salts, metal salts, ammonium salts, organic amine addition salts, and the like.
- acid addition salts include hydrochloride, hydrobromide, hydroiodide, phosphate, nitrate, sulfate, and other inorganic acid salts, formate, acetate, propionate, toluenesulfonic acid Salt, succinate, oxalate, lactate, tartrate, glycolate, methanesulfonate, butyrate, valerate, citrate, fumarate, maleate, malate, etc.
- Organic acid addition salts can be exemplified.
- metal salts include alkali metal salts such as lithium salt, sodium salt and potassium salt, alkaline earth metal salts such as magnesium and calcium salt, and metal salts such as aluminum and zinc.
- ammonium salts include ammonium salts and alkylammonium salts such as tetramethylammonium salts.
- organic amine salt include salts such as triethylamine salt, piperidine salt, morpholine salt, and toluidine salt. These salts can also be used as a solution at the time of use.
- ALA preferred are various esters such as 5-ALA and 5-ALA methyl ester, 5-ALA ethyl ester, 5-ALA propyl ester, 5-ALA butyl ester, 5-ALA pentyl ester, etc.
- esters such as 5-ALA and 5-ALA methyl ester, 5-ALA ethyl ester, 5-ALA propyl ester, 5-ALA butyl ester, 5-ALA pentyl ester, etc.
- hydrochlorides, phosphates and sulfates can be particularly preferably exemplified.
- the ALAs can be produced by any known method of chemical synthesis, production by microorganisms, or production by enzymes.
- the ALAs may form hydrates or solvates, and any one of them may be used alone or in combination of two or more.
- the iron compound may be an organic salt or an inorganic salt.
- the inorganic salt include ferric chloride, iron sesquioxide, iron sulfate, and ferrous pyrophosphate.
- the organic salt include a carboxylate.
- hydroxycarboxylates such as ferrous citrate, sodium iron citrate, sodium ferrous citrate, ammonium iron citrate, ferric pyrophosphate, iron lactate, gluconic acid
- Ferrous iron sodium diethylenetriaminepentaacetate, ammonium diethylenetriaminepentaacetate, sodium iron ethylenediaminetetraacetate, ammonium irondiaminediaminetetraacetate, sodium iron dicarboxymethylglutamate, ammonium dicarboxymethylglutamate, ferrous fumarate, iron acetate, Iron oxalate, ferrous succinate, iron citrate
- organic acid salts such as lithium, heme iron, dextran iron, triethylenetetraamine iron, lactoferrin iron
- the above iron compounds may be used alone or in admixture of two or more.
- the dose of the iron compound may be 0.01 to 100 times in molar ratio with respect to the dose of ALA (5-ALA conversion), preferably 0.05 to 10 times, preferably 0.1 times. ⁇ 8 times is more desirable.
- the radiation damage may be administered as a composition containing the ALA and the iron compound, or individually or simultaneously. it can.
- a composition containing the ALA and the iron compound or individually or simultaneously. it can.
- each is administered alone it is preferable to administer at the same time.
- administration of ALAs and an iron compound can exert an additive effect, preferably a synergistic effect. It is preferable to administer.
- the agent for preventing and / or treating radiation damage according to the present invention, the kit for preventing and / or treating radiation damage, and the cytokine, nitroprusside, lactoferrin, 6,10,14,18-tetramethyl- for promoting hematopoiesis 5,9,13,17-nonadecatetraen-2-one, pyrazolone derivatives, growth factor SCF, IL3, GM-CSF and IL6, ( ⁇ ) -N, N′-propylene dinicotinamide, 13-oxygel
- One or more existing preventive or therapeutic agents for radiation damage such as milpropionic acid, ⁇ -lapachone, phosphorus derivatives of alkaloids, ⁇ -D-glucopyranosyl- (1 ⁇ 2) -L-ascorbic acid, amifostine Can be used in combination.
- the agent for preventing and / or treating radiation damage of the present invention and a kit for preventing and / or treating radiation damage can also be used in combination with bone marrow transplantation therapy. Since the agent for preventing and / or treating radiation damage according to the present invention and the kit for preventing and / or treating radiation damage are different from the action mechanism of these existing agents for preventing and / or treating radiation damage and bone marrow transplantation therapy, With the combination of agents for preventing and / or treating radiation damage according to the present invention, an additive and sometimes synergistic effect can be expected.
- sublingual administration As a route of administration of each component of the preventive and / or therapeutic agent of the present invention and each component of the kit for preventing and / or treating radiation injury and the combination of prophylactic and therapeutic agents, sublingual administration is also possible.
- medical agent as the administration route of the existing preventive / therapeutic agent of the radiation damage in the combination of a preventive and / or therapeutic agent.
- each component of the preventive and / or therapeutic agent of the present invention and each component of the kit for preventing and / or treating radiation injury and the combination of prophylactic / therapeutic agents is the above administration route. It can be appropriately determined depending on the situation, and includes injections, nasal drops, drops, tablets, capsules, fine granules, powders, solutions, syrups, etc., liquid preparations, poultices, suppositories, etc. Can do.
- Each component of the preventive and / or therapeutic agent for radiation damage and the kit for preventing and / or treating radiation damage of the present invention can be in the form of a tablet or capsule supplement in addition to pharmaceutical use. In particular, for elderly people and infants who have difficulty in swallowing, a disintegrating tablet form that rapidly disintegrates in the mouth and a liquid form suitable for nasogastric tube administration are preferable.
- a pharmacologically acceptable carrier excipient, dilution as necessary.
- the agent for preventing and / or treating radiation damage and the kit for preventing and / or treating radiation damage according to the present invention can be used not only for humans but also in veterinary fields such as livestock, poultry and pets.
- the amount, frequency, and duration of administration of such preventive and / or therapeutic agents vary depending on the age, weight, symptoms, etc. of the radiation disorder patient when the subject is a human, but the dose of ALAs is 5-ALA mole.
- the administration frequency include administration once to a plurality of times a day or continuous administration by infusion. The administration period can be determined by methods known to pharmacologists and clinicians in the art.
- Example 1 ⁇ Radiation damage mitigation effect by 5-ALA administration to mice suffering from radiation damage> With regard to death caused by various symptoms such as bone marrow suppression caused by irradiation, the survival rate improvement effect by ALA administration, suppression of weight loss, and appearance change were verified.
- mice Males of C57BL / 6 mice were purchased from Japan SLC Co., Ltd. at the age of 8 weeks, and visually healthy mice were used for the test on the day of arrival. On the next day of arrival, the group was divided into 3 groups as 10 animals per group by random extraction based on body weight, and further, 1 group was divided into 3 animals, 3 animals, and 4 animals per cage.
- Basic feed MF manufactured by Oriental Yeast Co., Ltd. was freely ingested together with tap water, and was raised in a breeding room with a room temperature of 23 to 24 ° C., a humidity of 30 to 40% and a fluorescent lamp illumination for 12 hours.
- Test group As shown below, it was divided into three groups [1] to [3] with different administration drugs. [1] group; 5-ALA non-administered group (10 animals) [2] group: 5-ALA hydrochloride 10 mg / kg body weight administration group (10 animals) [3] Group: 5-ALA hydrochloride 100 mg / kg body weight administration group (10 animals)
- the radiation irradiation day was set to day 0, and survival was confirmed to day 21. Individuals who survived for 21 days were determined to be alive. During day 5-12, death was confirmed at least once every two days. Individuals with weight loss of 30% or more, poor movement (does not escape even when touched), and decreased body temperature were determined to be dead. A carcass that had been cured after dying was determined to be 12 or more hours old. If confirmed in the morning, it was determined that the day before death.
- Appearance change Table 1 shows the appearance change of the test group used in the examination.
- the [1] ALA non-administration group showed poor hairiness due to radiation, and napped and weakened.
- the 10 mg / kg administration group and the [3] 100 mg / kg administration group had mild fuzz as compared to the [1] ALA non-administration group.
- Example 2 Hematopoietic promotion effect by administration of 5-ALA or 5-ALA + ferrous citrate (SFC) to mice suffering from radiation damage> It was verified whether prophylactic / therapeutic administration of 5-ALA or 5-ALA + SFC has a hematopoietic promoting effect on hematopoietic disorders as a side effect of radiation therapy.
- mice Males of C57BL / 6 mice were purchased from Japan SLC Co., Ltd. at the age of 8 weeks, and visually healthy mice were used for the test on the day of arrival. The day after arrival, the group was divided into 10 groups as 4 animals per group by random extraction based on body weight, and 1 group was stored in 1 cage.
- Basic feed MF manufactured by Oriental Yeast Co., Ltd. was freely ingested together with tap water, and was raised in a breeding room with a room temperature of 23 to 24 ° C., a humidity of 30 to 40% and a fluorescent lamp illumination for 12 hours.
- Test group As shown below, it was divided into 9 groups of 1) to 9) and 10 groups of untreated groups, which differed in the administered drug and radiation dose.
- Ery I to IV are erythrocyte progenitor cells. After sorting only CD11b ⁇ cells using a flow cytometer, the cells were developed using two markers, Ter119 and CD71. The expression of Ter119 increases with differentiation, and CD71 decreases. That is, EryI is the most immature and EryIV is the most mature erythroid progenitor cell.
- DN, DP, CD4SP, and CD8SP are T cells and T cell progenitor cells. It changes from DN to DP with differentiation, and finally differentiates into CD4SP or CD8SP which is a mature T cell. For these distinctions, only the blood cell line marker CD45 + cells were sorted with a flow cytometer, and then developed using two markers CD4 and CD8.
- FIG. 4 shows the results of analyzing a cell group collected from bone marrow, spleen and thymus by a flow cytometer.
- the number of bone marrow cells was counted as the sum of B cells, T cells, polymorphonuclear leukocytes (neutrophils), monocytes, and EryI to IV.
- the number of thymocytes was counted as the sum of the numbers of CD4SP, CD8SP, DN, and DP.
- the number of spleen cells was counted as the sum of B cells, T cells, polymorphonuclear leukocytes (neutrophils), monocytes, and EryI to IV.
- the number of bone marrow cells (normal 1.4 ⁇ 10 7 ), it was considered that there was a threshold between 4.0 Gy irradiation and 4.5 Gy irradiation.
- the number of thymocytes (normal 1.0 ⁇ 10 8 ) was reduced to about 1/10 of normal by irradiation with 3.5 Gy, but there was no large difference between 3.5 to 4.5 Gy irradiation.
- the number of spleen cells (normal 7.5 ⁇ 10 7 ) is about 1/30 of normal with 3.5 Gy irradiation, and a decreasing trend is seen linearly in a dose-dependent manner between 3.5 and 4.5 Gy irradiation. It was.
- Test group As shown below, it was divided into 3 groups a) to c) and 4 untreated groups with different drugs. a) group; 5-ALA non-administration group b) group; 5-ALA hydrochloride 100 mg / kg body weight administration group c) group; 5-ALA hydrochloride 100 mg + SFC 157 mg / kg body weight administration group
- FIG. 6 shows the results of analyzing a cell group collected from bone marrow, spleen and thymus by a flow cytometer.
- the number of bone marrow cells was counted as the sum of B cells, T cells, polymorphonuclear leukocytes (neutrophils), monocytes, and EryI to IV.
- the number of thymocytes was counted as the sum of the numbers of CD4SP, CD8SP, DN, and DP.
- the number of spleen cells was counted as the sum of B cells, T cells, polymorphonuclear leukocytes (neutrophils), monocytes, and EryI to IV.
- FIG. 7 shows the results of counting the number of erythrocyte progenitor cells EryI, EryII / III, and EryIV among the bone marrow cells in FIG.
- the number of bone marrow TER119 + erythrocyte progenitor cells tended to improve in the ALA administration group.
- the result of counting the number of erythroid progenitor cells EryIV among the spleen cells of FIG. 6 is shown in FIG.
- the number of erythrocyte progenitor cells EryIV was statistically significantly improved in the ALA administration group.
- the number of each of polymorphonuclear leukocytes (neutrophils), monocytes, and B cells is counted, and the number of granulocyte / monocyte / macrophage / NK cell marker CD11b + cells. Also counted.
- FIG. 9 The results are shown in FIG. 9 (upper). As a result, the number of monocytes and the number of B cells tended to improve in the ALA administration group.
- the number of each of polymorphonuclear leukocytes (neutrophils), monocytes, B cells and T cells was counted, and CD11b + which is a granulocyte / monocyte / macrophage / NK cell marker The number of cells was also counted.
- the results are shown in FIG. 9 (bottom).
- the number of polymorphonuclear leukocytes, the number of CD11b + cells and the number of T cells tended to improve in the ALA administration group.
- the B cell count was statistically significantly improved in the ALA administration group
- the T cell count was statistically significantly improved in the ALA + SFC administration group, but the monocyte count was ALA + SFC. There was a statistically significant decrease in the treated group.
- the decrease in spleen cells of mildly radiation-damaged mice was suppressed by administration of ALA or ALA + SFC.
- the administration of ALA suppressed the decrease in erythroid progenitor cells EryIV, which have a relatively high maturity, in the spleen cells of mildly radiation-damaged mice.
- the agent for preventing and / or treating radiation damage of the present invention can be beneficially used in the medical field and the like.
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Description
[1]低線量の継続的な曝露が引き起こす障害への予防法は存在しなかった。
[2]放射線治療の副作用予防は、一般的に使われる薬が存在しなかった。
[3]治療法について、タンパク製剤は一定のクオリティを担保することが難しく、高価である。造血幹細胞移植はマッチするドナーが存在するとは限らないため、汎用的な治療法とはなりえない。
[4]治療法について、従来の技術では骨髄に対する障害は抑制できるが、それ以外の炎症・脱毛・下痢などの症状への治療法は確立されていない。
<放射線障害を患ったマウスへの5-ALA投与による放射線障害緩和効果>
放射線照射に伴い惹起する、骨髄抑制をはじめとする諸症状によって引き起こされる死亡について、ALA投与による生存率向上効果および体重減少の抑制、外見上の変化を検証した。
(1)動物及び飼育条件
日本SLC株式会社よりC57BL/6マウスの雄を8週齢で購入し、入荷当日に視診上健康なマウスを試験に供した。入荷翌日、体重を基に無作為抽出により1群10匹として3群に分け、更に1群を1ケージ当たり3匹、3匹、4匹となるように分けた。オリエンタル酵母株式会社製の基礎飼料MFを、水道水と共に自由に摂取させ、室温23~24℃、湿度30~40%、12時間蛍光灯照明の飼育室において飼育した。
以下に示すとおり、投与薬剤の異なる[1]~[3]の3群に分けた。
[1]群;5-ALA非投与群(10匹)
[2]群;5-ALA塩酸塩10mg/kg body weight投与群(10匹)
[3]群;5-ALA塩酸塩100mg/kg body weight投与群(10匹)
パンタックHF350(200KV,20mA Filter:Cu0.1mm+Al0.5mm)にて、3時間の間隔を空けて4Gyの放射線を2回、計8Gyの放射線を照射した。
照射開始後、毎日、上記[1]群に対しては水、[2]群及び[3]群に対しては5-ALA塩酸塩水溶液を、それぞれゾンデを用いて胃内に強制投与した。
放射線照射日をday0とし、day21まで生存を確認した。21日間生き延びた個体は生存と判定した。day5-12の間は最低2日に1回死亡確認を行い、体重減少が30%以上、動きが悪く(触っても逃げない)、体温低下を認める個体は死亡と判定した。死後硬直を経過して解硬した死体は12時間以上前の死亡と判定した。なお、午前中に確認した場合は前日の死亡と判定した。
上記(5)における生存確認の際、同時に体重を測定した。
上記(5)における測定の間、投与群、非投与群の間に、外見に何らかの変化が見られるかどうかについて確認を行った。
(1)生存率の変化
検査に用いた試験群の生存率の変化を図1に示す。[3]100mg/kg投与群と[1]ALA非投与群のLogrank法による有意差検定の結果、有意に[3]100mg/kg投与群の方の生存率が向上した。([1]0mg/kg vs [3]100mg/kg;p=0.0289、[1]0mg/kg vs [2]10mg/kg;p=0.161)
検査に用いた試験群の体重の変化を図2に示す。照射11日後において、[1]ALA非投与群と[2]10mg/kg投与群、及び[3]100mg/kg投与群との体重に有意差が見られた。([1]0mg/kg vs [3]100mg/kg;p=0.03456,[1]0mg/kg vs [2]10mg/kg;p=0.03556)
検査に用いた試験群の外見上の変化の所見を以下の表1に示す。経時的に5-ALA投与群、5-ALA非投与群の外見を観察し続けたところ、[1]ALA非投与群は放射線により毛づやが悪く、立毛して衰弱が見られたが、[2]10mg/kg投与群、及び[3]100mg/kg投与群は[1]ALA非投与群に比べて毛羽立ちが軽度であった。
<放射線障害を患ったマウスへの5-ALA又は5-ALA+クエン酸第一鉄(SFC)投与による造血促進効果>
放射線治療の副作用としての造血障害に対して、予防・治療的な5-ALA又は5-ALA+SFCの投与により造血促進効果が得られるかを検証した。
[実験方法]
(1)動物及び飼育条件
日本SLC株式会社よりC57BL/6マウスの雄を8週齢で購入し、入荷当日に視診上健康なマウスを試験に供した。入荷翌日、体重を基に無作為抽出により1群4匹として10群に分け、1群を1ケージに収納した。オリエンタル酵母株式会社製の基礎飼料MFを、水道水と共に自由に摂取させ、室温23~24℃、湿度30~40%、12時間蛍光灯照明の飼育室において飼育した。
以下に示すとおり、投与薬剤及び放射線量の異なる1)~9)の9群と未処理群の10群に分けた。
1)~3)群;5-ALA非投与で、3.5Gy照射群、4.0Gy照射群、4.5Gy照射群の3群
4)~6)群;5-ALA塩酸塩100mg/kg body weight投与で、3.5Gy照射群、4.0Gy照射群、4.5Gy照射群の3群
7)~9)群;5-ALA塩酸塩100mg+SFC157mg/kg body weight投与で、3.5Gy照射群、4.0Gy照射群、4.5Gy照射群の3群
パンタックHF350(200KV,20mA Filter:Cu0.1mm+Al0.5mm)にて、3.5Gy、4.0Gy、4.5Gyの3種の線量で放射線をday0に一括照射した。
照射開始2日前(day-2)からday6まで毎日、上記1)~3)群に対しては水、4)~6)群に対しては5-ALA塩酸塩水溶液、7)~9)群に対しては、5-ALA塩酸塩とSFCの水溶液を、それぞれゾンデを用いて胃内に強制投与した。
放射線照射日をday0とし、照射開始2日前(day-2)、day0、day3、day5及びday7に体重を測定した。
骨髄、脾臓及び胸腺から採取した細胞群を、フローサイトメーターにより解析した。各々の細胞を同定する指標として、以下の[表2]に示すマーカーを用いた。
※2.DN、DP、CD4SP、CD8SPはT細胞およびT細胞の前駆細胞である。分化とともにDNからDPへと変化し、最終的に成熟したT細胞であるCD4SPもしくはCD8SPへと分化する。これらの区別には、フローサイトメーターで血球系マーカーCD45+細胞のみをソートしたのち、CD4,CD8の二つのマーカーを用い展開した。
(1)体重の変化
評価モデルの確立検討試験に用いた試験群の体重の変化を、3.5Gy、4.0Gy、4.5Gyの各線量ごとに図3に示す。その結果、放射線照射による体重減少はいずれの線量でも5%以内であったが、ALA+SFC投与群ではいずれの線量でもH2Oコントロールと比較し、体重減少の軽減が認められた。
骨髄、脾臓及び胸腺から採取した細胞群を、フローサイトメーターにより解析した結果を図4に示す。骨髄細胞数は、B細胞、T細胞、多形核白血球(好中球)、単球、EryI~IVの合算値としてカウントした。胸腺細胞数は、CD4SP、CD8SP、DN、DPの数の合算値としてカウントした。脾臓細胞数は、B細胞、T細胞、多形核白血球(好中球)、単球、EryI~IVの合算値としてカウントした。
[実験方法]
(1)動物及び飼育条件
日本SLC株式会社よりC57BL/6マウスの雄を8週齢で購入し、入荷当日に視診上健康なマウスを試験に供した。入荷翌日、体重を基に無作為抽出により1群8匹として3群に分け、更に1群を1ケージ当たり4匹となるように収容した。また未処理群として1群4匹を1ケージに収容した。オリエンタル酵母株式会社製の基礎飼料MFを、水道水と共に自由に摂取させ、室温23~24℃、湿度30~40%、12時間蛍光灯照明の飼育室において飼育した。
以下に示すとおり、投与薬剤の異なるa)~c)の3群と未処理の4群に分けた。
a)群;5-ALA非投与群
b)群;5-ALA塩酸塩100mg/kg body weight投与群
c)群;5-ALA塩酸塩100mg+SFC157mg/kgbody weight投与群
パンタックHF350(200KV,20mA Filter:Cu0.1mm+Al0.5mm)にて、4.0Gyの線量で放射線をday0に一括照射した。
照射開始2日前(day-2)からday6まで毎日、上記a)群に対しては水、b)群に対しては5-ALA塩酸塩水溶液、c)群に対しては、5-ALA塩酸塩とSFCの水溶液を、それぞれゾンデを用いて胃内に強制投与した。
放射線照射日をday0とし、照射開始2日前(day-2)、day0、day3及びday6に体重を測定した。
骨髄、脾臓及び胸腺から採取した細胞群を、フローサイトメーターにより解析した。各々の細胞を同定する指標として、上記の[表2]に示すマーカーを用いた。
(1)体重の測定
造血促進効果の評価試験に用いた試験群の体重の変化を図5に示す。その結果、ALA+SFC投与群は体重減少において安定した改善傾向を示すことがわかった。
骨髄、脾臓及び胸腺から採取した細胞群を、フローサイトメーターにより解析した結果を図6に示す。骨髄細胞数は、B細胞、T細胞、多形核白血球(好中球)、単球、EryI~IVの合算値としてカウントした。胸腺細胞数は、CD4SP、CD8SP、DN、DPの数の合算値としてカウントした。脾臓細胞数は、B細胞、T細胞、多形核白血球(好中球)、単球、EryI~IVの合算値としてカウントした。
Claims (12)
- R1及びR2が、水素原子であることを特徴とする請求項1記載の放射線障害の予防及び/又は治療剤。
- さらに、鉄化合物を含有することを特徴とする請求項1又は2記載の放射線障害の予防及び/又は治療剤。
- 鉄化合物が、塩化第二鉄、三二酸化鉄、硫酸鉄、ピロリン酸第一鉄、クエン酸第一鉄、クエン酸鉄ナトリウム、クエン酸第一鉄ナトリウム、クエン酸鉄アンモニウム、ピロリン酸第二鉄、乳酸鉄、グルコン酸第一鉄、ジエチレントリアミン五酢酸鉄ナトリウム、ジエチレントリアミン五酢酸鉄アンモニウム、エチレンジアミン四酢酸鉄ナトリウム、エチレンジアミン四酢酸鉄アンモニウム、ジカルボキシメチルグルタミン酸鉄ナトリウム、ジカルボキシメチルグルタミン酸鉄アンモニウム、フマル酸第一鉄、酢酸鉄、シュウ酸鉄、コハク酸第一鉄、コハク酸クエン酸鉄ナトリウム、ヘム鉄、デキストラン鉄、トリエチレンテトラアミン鉄、ラクトフェリン鉄、トランスフェリン鉄、鉄クロロフィリンナトリウム、フェリチン鉄、含糖酸化鉄、及び硫化グリシン鉄から選ばれる1種又は2種以上の化合物であることを特徴とする請求項3記載の放射線障害の予防及び/又は治療剤。
- 体重の低下を改善するために使用することを特徴とする請求項1~4のいずれか記載の放射線障害の予防及び/又は治療剤。
- 生存率を向上させるために使用することを特徴とする請求項1~5のいずれか記載の放射線障害の予防及び/又は治療剤。
- 造血障害を緩和するために使用することを特徴とする請求項1~6のいずれか記載の放射線障害の予防及び/又は治療剤。
- 請求項1~7のいずれか記載の放射線障害の予防及び/又は治療剤を対象に投与することを特徴とする放射線障害を予防及び/又は治療する方法。
- a)請求項1~7のいずれか記載の放射線障害の予防及び/又は治療剤;
b)放射線障害の予防・治療剤;
を含む予防及び/又は治療薬剤の組合せ。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014526747A JP5920902B2 (ja) | 2012-07-23 | 2013-07-11 | 放射線障害の予防及び/又は治療剤 |
| EP13823261.6A EP2875812B1 (en) | 2012-07-23 | 2013-07-11 | Prophylactic and/or therapeutic agent for radiation damage |
| HK15107650.9A HK1206987B (zh) | 2012-07-23 | 2013-07-11 | 放射线损害的预防和/或治疗剂 |
| HK15106310.3A HK1205687B (en) | 2012-07-23 | 2013-07-11 | Prophylactic and/or therapeutic agent for radiation damage |
| US14/415,219 US9895331B2 (en) | 2012-07-23 | 2013-07-11 | Prophylactic and/or therapeutic agent for radiation damage |
| CN201380038645.8A CN104487066B (zh) | 2012-07-23 | 2013-07-11 | 放射线损害的预防和/或治疗剂 |
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| JP2012163110 | 2012-07-23 | ||
| JP2012-163110 | 2012-07-23 |
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| WO2014017046A1 true WO2014017046A1 (ja) | 2014-01-30 |
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| PCT/JP2013/004292 Ceased WO2014017046A1 (ja) | 2012-07-23 | 2013-07-11 | 放射線障害の予防及び/又は治療剤 |
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| US (1) | US9895331B2 (ja) |
| EP (1) | EP2875812B1 (ja) |
| JP (1) | JP5920902B2 (ja) |
| CN (1) | CN104487066B (ja) |
| TW (1) | TWI637743B (ja) |
| WO (1) | WO2014017046A1 (ja) |
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| AU2013337308B2 (en) * | 2012-11-05 | 2018-06-21 | Tdeltas | Ketone bodies to protect tissues from damage by ionizing radiation |
| US11529367B2 (en) | 2016-12-27 | 2022-12-20 | Miz Company Limited | Radiation damage protective agent |
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| ES2670413T3 (es) | 2003-06-03 | 2018-05-30 | The United States Government As Represented By The Department Of Health And Human Services | Suplementos nutricionales y composiciones terapéuticas que comprenden derivados de (R)-3-hidroxibutirato |
| US8642654B2 (en) | 2009-04-16 | 2014-02-04 | Isis Innovation Limited | Hydroxybutyrate ester and medical use thereof |
| GB201304467D0 (en) | 2013-03-12 | 2013-04-24 | Tdeltas Ltd | Compound for use in protecting skin |
| DK2984066T3 (en) | 2013-03-14 | 2017-05-08 | Univ Oxford Innovation Ltd | Process for preparing (R) -hydroxybutyl (R) -3-hydroxybutyrate |
| CN111060697A (zh) * | 2019-02-24 | 2020-04-24 | 中国疾病预防控制中心辐射防护与核安全医学所 | 一种利用hmgb1的小肠放射性损伤标记方法 |
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- 2013-07-11 CN CN201380038645.8A patent/CN104487066B/zh active Active
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- 2013-07-11 EP EP13823261.6A patent/EP2875812B1/en active Active
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| AU2013337308B2 (en) * | 2012-11-05 | 2018-06-21 | Tdeltas | Ketone bodies to protect tissues from damage by ionizing radiation |
| US11529367B2 (en) | 2016-12-27 | 2022-12-20 | Miz Company Limited | Radiation damage protective agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2014017046A1 (ja) | 2016-07-07 |
| HK1206987A1 (en) | 2016-01-22 |
| US20150190356A1 (en) | 2015-07-09 |
| HK1205687A1 (en) | 2015-12-24 |
| CN104487066A (zh) | 2015-04-01 |
| CN104487066B (zh) | 2020-06-09 |
| EP2875812B1 (en) | 2019-09-04 |
| JP5920902B2 (ja) | 2016-05-18 |
| EP2875812A4 (en) | 2016-02-24 |
| TW201412307A (zh) | 2014-04-01 |
| EP2875812A1 (en) | 2015-05-27 |
| US9895331B2 (en) | 2018-02-20 |
| TWI637743B (zh) | 2018-10-11 |
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