WO2013161994A1 - 鎮痛剤 - Google Patents
鎮痛剤 Download PDFInfo
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- WO2013161994A1 WO2013161994A1 PCT/JP2013/062374 JP2013062374W WO2013161994A1 WO 2013161994 A1 WO2013161994 A1 WO 2013161994A1 JP 2013062374 W JP2013062374 W JP 2013062374W WO 2013161994 A1 WO2013161994 A1 WO 2013161994A1
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- alkyl group
- dialkylaminoalkyl
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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
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
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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
- A61K31/16—Amides, e.g. hydroxamic acids
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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
- A61K31/16—Amides, e.g. hydroxamic acids
- A61K31/165—Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide
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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
- A61K31/22—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids of acyclic acids, e.g. pravastatin
- A61K31/23—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids of acyclic acids, e.g. pravastatin of acids having a carboxyl group bound to a chain of seven or more carbon atoms
- A61K31/231—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids of acyclic acids, e.g. pravastatin of acids having a carboxyl group bound to a chain of seven or more carbon atoms having one or two double bonds
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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
- A61K31/265—Esters, e.g. nitroglycerine, selenocyanates of carbonic, thiocarbonic, or thiocarboxylic acids, e.g. thioacetic acid, xanthogenic acid, trithiocarbonic acid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
- A61K47/40—Cyclodextrins; Derivatives thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/69—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit
- A61K47/6949—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit inclusion complexes, e.g. clathrates, cavitates or fullerenes
- A61K47/6951—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit inclusion complexes, e.g. clathrates, cavitates or fullerenes using cyclodextrin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
- A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/04—Centrally acting analgesics, e.g. opioids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
Definitions
- the present invention relates to a novel pharmaceutical use of a trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof. Specifically, the present invention relates to a trans-2-decenoic acid derivative having the structure described below and a pharmaceutical product thereof. The present invention relates to an analgesic containing as an active ingredient at least one kind of salt acceptable for the above.
- the present invention relates to an analgesic containing at least one of a trans-2-decenoic acid derivative and a pharmaceutically acceptable salt thereof, which will be described later, as an active ingredient.
- Patent Document 1 discloses that a fatty acid or a fatty acid ester having 8 or 10 to 12 carbon atoms has a neurotrophic factor-like action.
- the compound described in Patent Document 1 has a different chemical structure from the compound that is the active ingredient of the present analgesic.
- the neurotrophic factor-like agent of Patent Document 1 is useful as a prophylactic / ameliorating agent for neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease, and mental disorders such as depression and anxiety disorder (neuropathy).
- Patent Document 2 relates to the growth control action of pathogenic bacteria such as fungi in plants.
- Non-Patent Document 1 or 3 relates to a regioselective or stereoselective synthesis method using an ⁇ unsaturated amide or ester catalyst.
- Non-Patent Document 2 relates to the growth inhibitory action of Gram-positive bacteria. That is, there is no description regarding analgesic activity in any of these documents.
- the trans-2-decenoic acid derivative or the pharmaceutically acceptable salt thereof according to the analgesic of the present invention has an analgesic action and is an unknown knowledge so far. .
- An object of the present invention is to provide an analgesic having an excellent effect.
- trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof has an excellent analgesic effect and completed the present invention. That is, the present invention is as follows. [1] An analgesic containing as an active ingredient at least one of a trans-2-decenoic acid derivative represented by the following general formula (1) and a pharmaceutically acceptable salt thereof.
- W represents W1 when Y is —O—, W2 when Y is —NR—, or W3 when Y is —S—
- W1 represents a dialkylaminoalkyl group, an alkylthioalkyl group, an alkoxyalkyl group, a dialkoxyalkyl group or a dialkylaminoalkoxyalkyl group
- W2 represents a hydrogen atom, an alkyl group or a dialkylaminoalkyl group
- W2 represents the same or different alkyl group as R, or (2-3) when R is a hydrogen atom, W2 is an alkyl group, cycloalkyl group, pyrrolidine alkyl.
- W3 represents an alkyl group, a cycloalkyl group, a phenylalkyl group or a dialkylaminoalkyl group.
- Y is —O—
- W1 is a dialkylaminoalkyl group, an alkylthioalkyl group, an alkoxyalkyl group, a dialkoxyalkyl group or a dialkylaminoalkoxyalkyl group.
- Y is —NR—.
- the analgesic according to [9], wherein the osteoarthritis is knee osteoarthritis or hip osteoarthritis.
- the analgesic according to any one of [1] to [10], wherein [11] is an injection.
- the trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof according to any one of [1] to [7], which is used for treating pain diseases.
- trans-2-decenoic acid derivative or the pharmaceutically acceptable salt thereof according to any one of [1] to [7] is administered to a patient having a pain disease.
- a method for treating a pain disorder which is characterized.
- the trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof according to the analgesic of the present invention is a compound having an excellent analgesic action, and has various pain properties such as pain caused by joint pain such as osteoarthritis. It is very useful as a drug for treating diseases.
- the present invention relates to an analgesic containing as an active ingredient at least one of a trans-2-decenoic acid derivative represented by the following general formula (1) and a pharmaceutically acceptable salt thereof.
- the compound represented by the following general formula (1) is disclosed in the application specification of the international application PCT / JP2011 / 75228.
- the compound can be synthesized by the method described later, and a detailed synthesis method can be obtained if necessary from the international publication of the above international application.
- W represents W1 when Y is —O—, W2 when Y is —NR—, or W3 when Y is —S—
- W1 represents a dialkylaminoalkyl group, an alkylthioalkyl group, an alkoxyalkyl group, a dialkoxyalkyl group or a dialkylaminoalkoxyalkyl group
- W2 represents a hydrogen atom, an alkyl group or a dialkylaminoalkyl group
- W2 represents the same or different alkyl group as R, or (2-3) when R is a hydrogen atom, W2 is an alkyl group, cycloalkyl group, pyrrolidine alkyl.
- W3 represents an alkyl group, a cycloalkyl group, a phenylalkyl group or a dialkylaminoalkyl group.
- alkyl of “aminoalkyl” in the case where W1 is “dialkylaminoalkyl group” may be any, but preferably methyl, ethyl, propyl, isopropyl , Butyl, isobutyl, sec-butyl, t-butyl, pentyl, isopentyl, neopentyl, t-pentyl, dimethylpropyl, hexyl, isohexyl, heptyl, isoheptyl, octyl, isooctyl, nonyl, isononyl, decyl, isodecyl, etc.
- Alkyl when both R and W2 are alkyl groups may be the same or different, but is preferably methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, t- Represents a linear or branched alkyl group having 1 to 10 carbon atoms such as butyl, pentyl, isopentyl, neopentyl, t-pentyl, hexyl, isohexyl, heptyl, isoheptyl, octyl, isooctyl, nonyl, isononyl, decyl, isodecyl, etc. More preferably, it represents a linear or branched alkyl group having 1 to 7 carbon atoms.
- Alkyl in the case where R is a hydrogen atom and W2 is an alkyl group may be any, but is preferably methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, t-butyl, 2- Methylbutyl, pentyl, isopentyl, neopentyl, t-pentyl, hexyl, isohexyl, heptyl, isoheptyl, 1-propylbutyl, octyl, isooctyl, 1-ethylhexyl, 1,1,3,3-tetramethylbutyl, nonyl, isononyl, decyl Represents a linear or branched alkyl group having 1 to 10 carbon atoms such as isodecyl, and more preferably represents a linear or branched alkyl group having 1 to 8 carbon atoms.
- alkyl in the case where W3 is an alkyl group may be any, but is preferably methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, t-butyl, pentyl, isopentyl, neopentyl, t -Represents a linear or branched alkyl group having 1 to 12 carbon atoms such as pentyl, hexyl, isohexyl, heptyl, isoheptyl, octyl, isooctyl, nonyl, isononyl, decyl, isodecyl, undecyl, isoundecyl, dodecyl, isododecyl, etc. More preferably, it represents a linear or branched alkyl group having 4 to 10 carbon atoms.
- the “cycloalkyl group” may be any one, but preferably represents a cycloalkyl group having 3 to 8 carbon atoms such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, etc. More preferably, it represents a cycloalkyl group having 5 or 6 carbon atoms.
- Alkyl in the substituent of the general formula (1) other than those mentioned above may be any, but preferably methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, t- It represents a linear or branched alkyl group having 1 to 4 carbon atoms such as butyl.
- alkoxy may be any one, but preferably methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy, t-butoxy Represents a linear or branched alkoxy group having 1 to 4 carbon atoms, such as
- the compound represented by the general formula (1) of the present invention can be produced using trans-2-decenoic acid as a raw material, for example, as shown in the following reaction formula. (In the formula, Y and W are the same as above.)
- the compound represented by the general formula (1) can be produced by dehydrating and condensing the compound represented by the general formula (2) and the compound represented by the general formula (3) having active hydrogen. .
- a known method can be adopted for the dehydration condensation reaction.
- the compound represented by the general formula (2) and the compound represented by the general formula (3) are converted into a suitable condensing agent (for example, dicyclohexylcarbodiimide (DCC), N- (3-dimethylaminopropyl) -N ′ -Ethyl carbodiimide, HCl, etc.).
- the reaction can be usually carried out in a solvent (for example, dichloromethane and the like).
- the amount of the compound represented by the general formula (3) is usually 0.5 to 2 mol (preferably 1 to 1.5 mol) per 1 mol of the compound represented by the general formula (2).
- the compound represented by the general formula (2) is once converted into a carboxylic acid halide and then reacted with the compound represented by the general formula (3) in the presence or absence of a base.
- a base for the conversion to a carboxylic acid halide, for example, a halogenating agent such as thionyl chloride, sulfyryl chloride, phosphorus trichloride, phosphorus pentachloride, oxalyl chloride, or trichloride phosphate can be used.
- the base include triethylamine, pyridine and the like.
- the amount of the compound represented by the general formula (3) is usually 0.5 to 2 mol (preferably 1 to 1.5 mol) per 1 mol of the compound represented by the general formula (2).
- the amount of base used is usually about 1 to 5 moles per mole of the compound represented by the general formula (2).
- the compound represented by the general formula (1) includes salts, solvates and prodrugs as well as the above-mentioned free form.
- a pharmaceutically acceptable salt form is suitable for use as a pharmaceutical.
- the salt include inorganic acid salts such as phosphoric acid, hydrochloric acid, sulfuric acid and nitric acid, and organic acid salts such as citric acid, tartaric acid, lactic acid and glycolic acid.
- the salt can be obtained by a usual method. For example, a solution containing equimolar amounts of the trans-2-decenoic acid derivative represented by the general formula (1) and an organic acid such as citric acid is prepared, and the solvent is distilled off. And can be obtained as crystals.
- solvates include hydrates and alcohol solvates.
- various isomers such as an optically active substance, a racemate and a diastereomer are also included.
- the compound of the present invention becomes a crystal, various crystal forms (crystal polymorphs) that can be formed are also included.
- the analgesic of the present invention contains at least one trans-2-decenoic acid derivative and a pharmaceutically acceptable salt thereof as an active ingredient, and is useful as a preventive or therapeutic agent for various pain diseases.
- the pain disease may be of any kind, and examples thereof include joint pain such as pain caused by osteoarthritis such as knee osteoarthritis and hip osteoarthritis, and pain caused by rheumatoid arthritis.
- the trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof according to the present invention can be used in various dosage forms (oral preparations, injections, external preparations, etc.) in combination with appropriate pharmaceutical carriers and diluents as appropriate.
- the analgesic of the present invention may be a compounding agent in which a compound that is an active ingredient thereof is combined with other pharmaceutically active ingredients.
- the analgesic of the present invention may be formulated as an inclusion body with cyclodextrin or the like. By doing so, enhancement of pharmacological activity, improvement of stability, sustainability, ease of handling, etc. can be obtained.
- the clathrate can be formed, for example, by mixing a compound that is an active ingredient of the analgesic of the present invention and ⁇ -, ⁇ -, or ⁇ -cyclodextrin.
- analgesic agent of the present invention When the analgesic agent of the present invention is used as an oral agent, additives suitable for the compound of the present invention, such as excipients, binders, disintegrants, lubricants, bulking agents, wetting agents, buffering agents, preservatives, fragrances
- a tablet, a powder, a granule, or a capsule can be prepared according to a prescription appropriately combined.
- a stabilizer, a preservative, an isotonic agent etc. can be added to the solution and suspension containing the compound which concerns on this invention analgesic, and it can be set as an injection.
- it When it is used as an external preparation, it can be formulated into external preparations such as patches, gels, ointments and creams.
- the compound relating to the analgesic of the present invention is prepared by mixing, melting, emulsifying and the like in an appropriate base, and in the case of a patch, this is spread and applied on a support.
- a patch a gel, etc., it can be set as the thing using the organogelator, for example.
- preservatives, antioxidants, flavoring agents, pressure-sensitive adhesives and the like that are usually used depending on the dosage form of each external preparation can be appropriately selected and added to the formulation.
- the desired dose of the analgesic of the present invention can be appropriately increased or decreased in consideration of the usage, patient age, sex, symptom level, etc., but is usually 1 to 1000 mg per day for an adult, preferably 5 to 300 mg once a day or It can be administered in several divided doses.
- test drug A test drug solution (100 ⁇ g / mL) using a compound according to the analgesic of the present invention as a test drug is a phosphate buffered saline (PBS) containing 0.1 vol% dimethyl sulfoxide (DMSO). It was prepared with. Immediately after group formation (14 days after MIA administration), the test drug solution was administered intraperitoneally at a dose of 500 ⁇ g / kg to the test drug administration group. Further, PBS containing 0.1 vol% DMSO was administered intraperitoneally once to the normal control group and the onset control group.
- PBS phosphate buffered saline
- DMSO dimethyl sulfoxide
- 50% response threshold recovery rate (%) (50% response threshold 1 hour after study drug administration-50% response threshold before study drug administration) ⁇ (normal threshold-50% response threshold before study drug administration) x 100
- the analgesic of the present invention showed an excellent inhibitory effect on hyperalgesia of OA induced by MIA administration.
- the analgesic of the present invention has excellent analgesic effect and hyperalgesia-inhibiting effect in animal experiments using MIA-induced OA rats, which are OA models. Therefore, the analgesic agent of the present invention is highly useful as an agent for preventing or treating various pain diseases such as pain due to OA.
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Abstract
Description
〔1〕下記一般式(1)で表されるトランス-2-デセン酸誘導体及びその薬学的に許容される塩の少なくとも一種を有効成分として含有する鎮痛剤。
Wは、Yが-O-のときW1を、Yが-NR-のときはW2を、又はYが-S-のときはW3を表し、
(1)W1はジアルキルアミノアルキル基、アルキルチオアルキル基、アルコキシアルキル基、ジアルコキシアルキル基又はジアルキルアミノアルコキシアルキル基を表し、
(2-1)Rがジアルキルアミノアルキル基のとき、W2は水素原子、アルキル基又はジアルキルアミノアルキル基を表し、
(2-2)Rがアルキル基のとき、W2はRと各々同一若しくは異なったアルキル基を表し、又は
(2-3)Rが水素原子のとき、W2はアルキル基、シクロアルキル基、ピロリジンアルキル基、フェニル基又はフェニルアルキル基を表し、
(3)W3はアルキル基、シクロアルキル基、フェニルアルキル基又はジアルキルアミノアルキル基を表す。〕
〔2〕Yが-O-で、W1がジアルキルアミノアルキル基、アルキルチオアルキル基、アルコキシアルキル基、ジアルコキシアルキル基又はジアルキルアミノアルコキシアルキル基である前記〔1〕記載の鎮痛剤。
〔3〕Yが-NR-である前記〔1〕記載の鎮痛剤。
〔4〕Rがジアルキルアミノアルキル基で、W2が水素原子、アルキル基又はジアルキルアミノアルキル基である前記〔3〕記載の鎮痛剤。
〔5〕Rがアルキル基で、W2がRと同一又は異なったアルキル基である前記〔3〕記載の鎮痛剤。
〔6〕Rが水素原子で、W2がアルキル基、シクロアルキル基、ピロリジンアルキル基、フェニル基又はフェニルアルキル基である前記〔3〕記載の鎮痛剤。
〔7〕Yが-S-で、W3がアルキル基、シクロアルキル基、フェニルアルキル基又はジアルキルアミノアルキル基である前記〔1〕記載の鎮痛剤。
〔8〕関節痛に対する治療剤である前記〔1〕乃至〔7〕のいずれかに記載の鎮痛剤。
〔9〕前記関節痛が変形性関節症による疼痛である前記〔8〕記載の鎮痛剤。
〔10〕前記変形性関節症が変形性膝関節症又は変形性股関節症である前記〔9〕記載の鎮痛剤。
〔11〕が注射剤である前記〔1〕乃至〔10〕のいずれかに記載の鎮痛剤。
〔12〕経口剤である前記〔1〕乃至〔10〕のいずれかに記載の鎮痛剤。
〔13〕前記注射剤又は経口剤がシクロデキストリン包接体である前記〔11〕又は〔12〕の鎮痛剤。
〔14〕外用剤である前記〔1〕乃至〔10〕のいずれかに記載の鎮痛剤。
〔15〕前記外用剤が貼付剤である前記〔14〕記載の鎮痛剤。
〔16〕疼痛疾患を治療するために用いる前記〔1〕乃至〔7〕のいずれかに記載のトランス-2-デセン酸誘導体又はその薬学的に許容される塩。
〔17〕疼痛疾患を有する患者に前記〔1〕乃至〔7〕のいずれかに記載のトランス-2-デセン酸誘導体又はその薬学的に許容される塩の少なくとも一種の有効量を投与することを特徴とする、疼痛疾患の治療方法。
〔18〕疼痛疾患を治療するための医薬の製造における前記〔1〕乃至〔7〕のいずれかに記載のトランス-2-デセン酸誘導体又はその薬学的に許容される塩の使用。
Wは、Yが-O-のときW1を、Yが-NR-のときはW2を、又はYが-S-のときはW3を表し、
(1)W1はジアルキルアミノアルキル基、アルキルチオアルキル基、アルコキシアルキル基、ジアルコキシアルキル基又はジアルキルアミノアルコキシアルキル基を表し、
(2-1)Rがジアルキルアミノアルキル基のとき、W2は水素原子、アルキル基又はジアルキルアミノアルキル基を表し、
(2-2)Rがアルキル基のとき、W2はRと各々同一若しくは異なったアルキル基を表し、又は
(2-3)Rが水素原子のとき、W2はアルキル基、シクロアルキル基、ピロリジンアルキル基、フェニル基又はフェニルアルキル基を表し、
(3)W3はアルキル基、シクロアルキル基、フェニルアルキル基又はジアルキルアミノアルキル基を表す。〕
また、前記一般式(1)の置換基において、「アルコキシ」とは、いかなるものであってもよいが、好ましくはメトキシ、エトキシ、プロポキシ、イソプロポキシ、ブトキシ、イソブトキシ、sec-ブトキシ、t-ブトキシ等の炭素数1乃至4の直鎖状又は分岐状のアルコキシ基を表す。
例えば、一般式(2)で表される化合物と一般式(3)で表される化合物を、適当な縮合剤(例えば、ジシクロヘキシルカルボジイミド(DCC)、N-(3-ジメチルアミノプロピル)-N'-エチルカルボジイミド・HCl等)の存在下に反応することができる。反応は、通常溶媒(例えば、ジクロロメタン等)中で実施することができる。一般式(3)で表される化合物の使用量は、通常、一般式(2)で表される化合物1モルに対し、0.5~2モル(好ましくは1~1.5モル)である。
上記の反応終了後、公知の精製及び単離操作(例えば、抽出、クロマトグラフィー、蒸留、再結晶等)を用いて、目的化合物を得ることができる。
変形性関節症(Osteoarthritis; OA)のモデル動物であるモノヨード酢酸ナトリウム(MIA)誘発OAラットを用いて、本発明鎮痛剤の鎮痛作用を調べる以下の実験を行った。
(1)MIA誘発OAラットの作製
6週齢雄性Wistar系ラットの機械刺激に対する50%反応閾値(測定方法は後述)を測定して、正常対照群を選別した。正常対照群以外のラットに対し、右膝関節内に生理食塩液で調製したMIAを300μg/50μLの用量で単回投与し、左膝関節内には生理食塩液50μLを投与して、MIA誘発OAラットを作製した。また、正常対照群には、両膝の関節内に生理食塩液50μLを投与した。
実験動物の6週齢雄性Wistar系ラットは、正常対照群以外については上記(1)のMIA投与の24日後に、機械刺激に対する50%反応閾値(測定方法は後述)及び体重を測定して、1群6匹として正常対照群、発症対照群、被験薬投与群の3群に群編成を行った。
被験薬として本発明鎮痛剤に係る化合物を用いた被験薬溶液(100μg /mL)は、0.1vol%のジメチルスルホキシド(DMSO)を含むリン酸緩衝生理食塩液(PBS)で調製した。
群編成直後(MIA投与14日後)に、被験薬投与群には500μg/kgの用量で被験薬溶液を腹腔内に単回投与した。また、正常対照群及び発症対照群には0.1vol%DMSO含有PBSを腹腔内に単回投与した。
底が金網の透明アクリルゲージに、上記(2)記載の3群のラットを入れ、約3分間馴化させた後に、機械刺激に対する50%反応閾値を、被験薬の投与1時間後に測定した。
測定は、Chaplanら(Journal of Neuroscience Methods、53巻、1号、55-63頁、1994年)及びDixonら(Annual Review of Pharmacology and Toxicology、20巻、441-462頁、1980年)の方法に準じ、フォン・フライ フィラメント(von Frey filament、North Coast Medical Inc.製)を用いて行った。8本のフィラメント〔刺激荷重(g):0.4、0.6、1.0、2.0、4.0、6.0、8.0、15.0〕のうち、2.0gのフィラメントより開始し、軽度にフィラメントが湾曲する程度の力で2~3秒間、足底に対し垂直に当て、後肢が逃避反応を示した場合を陽性反応とした。陽性反応が見られた場合は一つ上の強さのフィラメントで同様に刺激し、反応が陰性から陽性へ又は陽性から陰性へ変化した時点を最初の2反応とし、その後4回連続してup-down法により刺激を行った。合計6回の刺激に対する反応を用いて、機械刺激に対する50%反応閾値を測定し、各群の平均値±標準誤差を算出した。なお、陽性反応がないまま15.0gの刺激まで行った場合は15.0g、陽性反応が0.4gまで続いた場合は0.25gを各々の閾値とした。被験薬投与1時間後の50%反応閾値について、正常閾値を15として、下記の式により、50%反応閾値の回復率(%)を算出した。
50%反応閾値の回復率(%)=(被験薬投与1時間後の50%反応閾値-被験薬投与前の50%反応閾値)÷(正常閾値-被験薬投与前の50%反応閾値)×100
Claims (15)
- 下記一般式(1)で表されるトランス-2-デセン酸誘導体及びその薬学的に許容される塩の少なくとも一種を有効成分として含有する鎮痛剤。
Wは、Yが-O-のときW1を、Yが-NR-のときはW2を、又はYが-S-のときはW3を表し、
(1)W1はジアルキルアミノアルキル基、アルキルチオアルキル基、アルコキシアルキル基、ジアルコキシアルキル基又はジアルキルアミノアルコキシアルキル基を表し、
(2-1)Rがジアルキルアミノアルキル基のとき、W2は水素原子、アルキル基又はジアルキルアミノアルキル基を表し、
(2-2)Rがアルキル基のとき、W2はRと各々同一若しくは異なったアルキル基を表し、又は
(2-3)Rが水素原子のとき、W2はアルキル基、シクロアルキル基、ピロリジンアルキル基、フェニル基又はフェニルアルキル基を表し、
(3)W3はアルキル基、シクロアルキル基、フェニルアルキル基又はジアルキルアミノアルキル基を表す。〕 - Yが-O-で、W1はジアルキルアミノアルキル基、アルキルチオアルキル基、アルコキシアルキル基、ジアルコキシアルキル基又はジアルキルアミノアルコキシアルキル基である請求項1記載の鎮痛剤。
- Yが-NR-である請求項1記載の鎮痛剤。
- Rがジアルキルアミノアルキル基で、W2が水素原子、アルキル基又はジアルキルアミノアルキル基である請求項3記載の鎮痛剤。
- Rがアルキル基で、W2がRと同一又は異なったアルキル基である請求項3記載の鎮痛剤。
- Rが水素原子で、W2がアルキル基、シクロアルキル基、ピロリジンアルキル基、フェニル基又はフェニルアルキル基である請求項3記載の鎮痛剤。
- Yが-S-で、W3がアルキル基、シクロアルキル基、フェニルアルキル基又はジアルキルアミノアルキル基である請求項1記載の鎮痛剤。
- 関節痛に対する治療剤である請求項1乃至7のいずれか一項記載の鎮痛剤。
- 前記関節痛が変形性関節症による疼痛である請求項8記載の鎮痛剤。
- 前記変形性関節症が変形性膝関節症又は変形性股関節症である請求項9記載の鎮痛剤。
- 注射剤である請求項1乃至10のいずれか一項に記載の鎮痛剤。
- 経口剤である請求項1乃至10のいずれか一項に記載の鎮痛剤。
- 前記注射剤又は錠剤がシクロデキストリン包接体である請求項11又は12記載の鎮痛剤。
- 外用剤である請求項1乃至10のいずれか一項に記載の鎮痛剤。
- 貼付剤である請求項14記載の鎮痛剤。
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