Classifications

• • 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
  • A61K31/66—Phosphorus compounds
  • A61K31/675—Phosphorus compounds having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate
• • 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
  • A61K31/66—Phosphorus compounds
  • A61K31/662—Phosphorus acids or esters thereof having P—C bonds, e.g. foscarnet, trichlorfon
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P27/00—Drugs for disorders of the senses
  • A61P27/02—Ophthalmic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P27/00—Drugs for disorders of the senses
  • A61P27/02—Ophthalmic agents
  • A61P27/10—Ophthalmic agents for accommodation disorders, e.g. myopia

Definitions

• WO 98/58939 describes TPMPA as a selective GABA-C antagonist, which shall exhibit cognitive enhancing activity.
• a GABA-C receptor antagonist such as TPMPA, has a useful efficacy in the treatment of myopia.
• the present invention provides a method of treating myopia in an individual in need of such treatment, comprising the step of administering an effective amount of a GABA-C receptor antagonist to said individual.
• the invention also pertains to the use of a GABA-C receptor antagonist in the manufacture of a medicament for the treatment of myopia.
• a GABA-C receptor antagonist should preferably be substantially inactive with respect to any efficacy for the receptor selected from GABA-B.
• a GABA-C receptor antagonist should preferably be substantially inactive with respect to any efficacy for the receptors selected from GABA-A and GABA-B.
• substantially inactive refers to an IC 50 value being typically above 50 micromolar, preferably above 100 micromolar, more preferably above 250 micromolar and in particular above 500 micromolar.
• a selective GABA-C receptor antagonist has typically an ICso-value being less than 40 micromolar, preferably less than 10 micromolar, more preferably less than 1 micromolar, and in particular in the range of 1 - 0.0001 micromolar, and more particular from 0.1 - 0.001 micromolar.
• GABA-C antagonists suitable to treat myopia are for example represented by general formula I or general formula II,
• X represents hydrogen, an alkyl group optionally substituted with a halogen, or a hydroxyalkyl group
• Alkyl has up to 20 carbon atoms and may be straight-chained or branched. Alkyl is preferably lower alkyl having up to 8 carbon atoms, especially up to 4, and more especially up to 2, carbon atoms. Suitable examples include dodecyl, octyl, hexyl, pentyl, butyl, propyl, ethyl, methyl, 2-propyl, 2-butyl and 3-pentyl.
• Alkenyl has from 2 to 20 carbon atoms and may be linear or branched. Alkenyl is especially lower alkenyl having from 2 to 8 carbon atoms, preferably from 2 to 6 carbon atoms and especially from 2 to 4 carbon atoms. Examples of alkenyl are vinyl, allyl, 1-propen-2-yl, 1- buten-2- or -3- or -4-yl, 2-buten-3-yl, and the isomers of pentenyl, hexenyl and octenyl.
• Alkynyl has from 2 to 20 carbon atoms and may be linear or branched. Alkynyl is especially lower alkynyl having from 2 to 8 carbon atoms, preferably from 2 to 6 carbon atoms and especially from 2 to 4 carbon atoms. Examples of alkynyl are ethynyl, propargyl, 1-butyn-1-, 3- or -4-yl, and the isomers of pentynyl, hexynyl and octynyl.
• Halogen is especially fluorine, chlorine, bromine or iodine, preferably fluorine, chlorine or bromine and more especially fluorine or chlorine.
• Alkoxy has up to 20 carbon atoms and is preferably lower alkoxy.
• Lower alkoxy has up to 8 carbon atoms, preferably up to 6 carbon atoms, and is, for example, methoxy, ethoxy, propoxy, butoxy, tert-butoxy or hexyloxy.
• Acyl has up to 20 carbon atoms and may be straight-chain or branched, preferably lower acyl having up to 8 carbon atoms, especially up to 4, and more especially up to 2, carbon atoms, and is for example acetyl.
• the invention provides the use of a compound having GABA- C antagonist activity, being in particular selected from the group of formula I and formula II as defined above, in the manufacture of a medicament for the treatment of myopia.
• a method for the treatment of myopia comprising the administration of a compound selected from the group of formula I and formula II as defined above to a patient in need of such treatment.
• GABA-C antagonists examples include GABA-C antagonists and their receptor profile.
• the appropriate dosage will of course vary depending upon, for example, the compound employed, the host, the mode of administration and the severity of the condition being treated. However, in general, satisfactory results in animals are indicated to be obtained at a daily dosage of from about 0.1 to about 10 mg/kg animal body weight. In larger mammals, for example humans, an indicated daily dosage may be in the range from about 5 to about 200 mg, preferably about 10 to about 100 mg of the compound. An administration may conveniently be administered in divided doses up to 4 times a day or in sustained release form.
• the compounds used in the invention may be administered in free form or in pharmaceutically acceptable salt form, provided said compound is able to form a salt.
• Such salts may be prepared in conventional manner and exhibit typically the same order of activity as the free compounds.
• Compounds according to the invention may be administered by any conventional route, for example intravitreally, e.g. in form of injectable solutions or suspensions, enterally, preferably orally, e.g. in the form of tablets or capsules, topically, e.g. ophthalmically, e.g. in the form of eye drops, gels, or ointments.
• intravitreally e.g. in form of injectable solutions or suspensions
• enterally preferably orally, e.g. in the form of tablets or capsules
• topically e.g. ophthalmically, e.g. in the form of eye drops, gels, or ointments.
• the invention relates to an ophthalmic composition
• a ophthalmic composition comprising an effective amount of a GABA-C antagonist and a carrier, which composition is suitable for topical ocular administration.
• Preferred carriers are water, cellulose derivatives, such as methylcellulose, alkali metal salts of carboxymethylcellulos ⁇ , hydroxymethylcellulose, hydroxyethylcellulose, methylhydroxypropylcellulose and hydroxypropylcellulose, neutral Carbopol, or mixtures thereof.
• a highly preferred carrier is water.
• the concentration of the carrier is, for example, from 1 to 100000 times the concentration of the active ingredient.

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• Health & Medical Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Medicinal Chemistry (AREA)
• Pharmacology & Pharmacy (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Epidemiology (AREA)
• Ophthalmology & Optometry (AREA)
• Engineering & Computer Science (AREA)
• Bioinformatics & Cheminformatics (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Organic Chemistry (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
• Medicinal Preparation (AREA)
• Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

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Applications Claiming Priority (2)

Publications (2)

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• 2003
  • 2003-06-27 JP JP2004516732A patent/JP2005533082A/ja active Pending
  • 2003-06-27 US US10/516,246 patent/US20060142249A1/en not_active Abandoned
  • 2003-06-27 AU AU2003245995A patent/AU2003245995A1/en not_active Abandoned
  • 2003-06-27 EP EP03738095A patent/EP1526858A2/en not_active Withdrawn
  • 2003-06-27 WO PCT/EP2003/006850 patent/WO2004002399A2/en not_active Ceased

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