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
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/55—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole
  • A61K31/551—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having seven-membered rings, e.g. azelastine, pentylenetetrazole having two nitrogen atoms, e.g. dilazep
• • 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
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
  • A61K31/517—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with carbocyclic ring systems, e.g. quinazoline, perimidine
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/06—Anti-spasmodics, e.g. drugs for colics, esophagic dyskinesia
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/14—Prodigestives, e.g. acids, enzymes, appetite stimulants, antidyspeptics, tonics, antiflatulents
• • 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]
• • 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

Definitions

• the invention relates to a method for preventing and treating visceral pain and gastrointestinal disorders such as functional bowel disorders and inflammatory bowel diseases through the use of effective amounts of a compound acting as CGRP antagonist.
• the viscera encompasses the organs of the abdominal cavity. Pain associated with the viscera can be divided into digestive visceral pain and non digestive visceral pain. Commonly encountered gastrointestinal disorders include the functional bowel disorders and the inflammatory bowel diseases. These gastrointestinal disorders include a wide range of disease states that are currently only moderately controlled, including gastro-esophageal reflux, dyspepsia, the irritable bowel syndrome and functional abdominal pain syndrome, Crohn's disease, ileitis and ulcerative colitis, and all regularly produce visceral pain.
• IBS Irritable bowel syndrome
• irritable colon also termed “irritable colon”, “spastic colon” or “mucous colitis”
• spastic colon is characterized by lower abdominal discomfort or pain associated with disturbance of defecation.
• the nature of the symptoms can vary between patients, varying from predominant constipation or diarrhea to predominant pain.
• This biopsychosocial disorder involves dysregulation of the nervous system, altered intestinal motility and increased visceral sensitivity.
• Visceral hypersensitivity has been proposed as one of three underlying mechanisms of IBS and this is supported by the fact that patients suffering from IBS have enhanced perception of visceral events. This visceral hypersensitivity appears to be the result of sensitization of visceral afferent mechanisms, most likely peptidergic C-fibers. Those afferent C-fibers contain Calcitonin Gene Related Peptide (CGRP) and this peptide has been shown to be pronociceptive.
• CGRP Calcitonin Gene Related Peptide
• the present invention thus relates to the use of CGRP antagonists (A) and/or release inhibitors for combating IBS, including both prevention and active treatment.
• the use according to the present invention preferably comprises monotherapy with a single substance, but also includes combined therapy with a number of substances (B) from the specified groups of active substances.
• the invention also relates to the use of CGRP antagonists and/or release inhibitors for preparing a pharmaceutical composition for the treatment of IBS as well as the corresponding pharmaceutical compositions containing as active substance one or more CGRP antagonists and/or release inhibitors.
• Any pharmaceutically acceptable active substances which antagonise the known effects of CGRP or inhibit the release of CGRP from sensory nerve endings may be used for the purposes of the present invention.
• CGRP antagonists include the amino acid derivatives described in the international patent application PCT/EP97/04862, as well as the non-peptidic active substances described in international patent applications PCT/EP03/11762, PCT/EP03/11763, PCT/EP2004/000087, PCT/EP2005/003094, PCT/US03/16576, PCT/US2004/040721, PCT/US2003/038799, PCT/US2005/010330, PCT/GB99/03154, PCT/US2004/007226, PCT/US2004/007289, PCT/US2004/007686, PCT/US2004/007678, PCT/US2004/007715, PCT/US2004/011254, PCT/US2004/010851, PCT/US2004/011280, PCT/US2004/020206, PCT/US2004/021888, PCT/US2004/020209, PCT/US2005/002199, PCT/US2005/031713, PC
• CGRP release inhibitors examples include serotonin 5-HT 1D -agonists such as avitriptan, eletriptan, naratriptan, rizatriptan, sumatriptan or zolmitriptan, as well as 5-HT 1F -agonists or NPY-agonists.
• the following compounds (A), for example, may be used for the treatment of IBS, for the preparation of a corresponding pharmaceutical composition and as an ingredient of a corresponding pharmaceutical composition.
• a first object of the present invention is therefore the use of a CGRP antagonist (A),
• the compounds were applied orally and are active in the dose range of 0.01 to 100 mg/kg.
• Also included in the subject matter of this invention are the compounds according to the invention, including the salts thereof, in which one or more hydrogen atoms, for example one, two, three, four or five hydrogen atoms, are replaced by deuterium.
• the compounds according to the present invention may have acid groups, mainly carboxyl groups, and/or basic groups such as e.g. amino functions.
• the compounds according to the invention may therefore be present as internal salts, as salts with pharmaceutically useable inorganic acids such as for example hydrobromic acid, phosphoric acid, nitric acid, hydrochloric acid, sulphuric acid, methanesulphonic acid, ethanesulphonic acid, benzenesulphonic acid, p-toluenesulphonic acid or organic acids such as for example malic acid, succinic acid, acetic acid, fumaric acid, maleic acid, mandelic acid, lactic acid, tartaric acid, citric acid or as salts with pharmaceutically useable bases such as alkali or alkaline earth metal hydroxides, for example sodium hydroxide or potassium hydroxide, or carbonates, ammonia, zinc or ammonium hydroxides or organic amines such as e.g. diethylamine, trie
• the compounds according to the invention may be converted into the salts thereof, particularly for pharmaceutical use, into the physiologically and pharmacologically acceptable salts thereof.
• These salts may on the one hand be in the form of the physiologically and pharmacologically acceptable acid addition salts of the compounds of formula I with inorganic or organic acids.
• the compound according to the invention may also be converted by reaction with inorganic bases into physiologically and pharmacologically acceptable salts with alkali or alkaline earth metal cations as counter ion.
• the acid addition salts may be prepared for example using hydrochloric acid, hydrobromic acid, sulphuric acid, phosphoric acid, methanesulphonic acid, acetic acid, fumaric acid, succinic acid, lactic acid, citric acid, tartaric acid or maleic acid. It is also possible to use mixtures of the above-mentioned acids.
• the alkali and alkaline earth metal salts of the compound of formula I are preferably the alkali and alkaline earth metal hydroxides and hydrides thereof, of which the hydroxides and hydrides of the alkaline earth metals, particularly of sodium and potassium, are preferred and sodium and potassium hydroxide are particularly preferred.
• the compounds according to the invention may occur as racemates if they have only one chiral element, but they may also be obtained as pure enantiomers, i.e. in the (R) or (S) form.
• Preferred compounds are those which occur as racemates or as the (R) form.
• the application also includes the individual diastereomeric pairs of antipodes or the mixtures thereof which are present when there is more than one chiral element in the compounds according to the invention, as well as the individual optically active enantiomers of which the above-mentioned racemates are made up.
• the invention relates to the compounds in question, optionally in the form of the individual optical isomers, mixtures of the individual enantiomers or racemates, in the form of the tautomers as well as in the form of the free bases or the corresponding acid addition salts with pharmacologically acceptable acids—such as for example acid addition salts with hydrohalic acids—for example hydrochloric or hydrobromic acid or organic acids—such as for example oxalic, fumaric, diglycolic or methanesulphonic acid.
• pharmacologically acceptable acids such as for example acid addition salts with hydrohalic acids—for example hydrochloric or hydrobromic acid or organic acids—such as for example oxalic, fumaric, diglycolic or methanesulphonic acid.
• CGRP antagonist (A) can be used as monotherapy, but can also used in combination with other active compounds (B) for the treatment of IBS.
• the compound (B) can be selected from the group consisting of 5-HT1 agonist such as, 5-HT 3 antagonists, 5-HT 4 agonists, mixed 5-HT 3 antagonists/5-HT 4 agonists, serotonin norepinephrine reuptake inhibitors, antispasmotic agents, anticholinergics, laxatives, ballast, antidiarrheals, tricyclic antidepressants and SSRIs, opioids, local anaesthetics, alpha2 agonists, cannabiniods, P2X3/P2X2/3 antagonists, CCK-antagonists, VR-1/TRPV1 antagonists, neurokinin antagonists, beta-3 adrenoceptor agonists, NSAIDs, COX 2 inhibitors and probiotics which may be formulated together with one or more inert conventional carriers and/or diluents, e.g.
• a 5-HT 1 agonist may be selected from the group consisting of avitriptan, eletriptan, naratriptan, rizatriptan, sumatriptan or zolmitriptan or the pharmaceutically acceptable salts thereof.
• a 5-HT 3 antagonist may be selected from the group consisting of alosetron, cilansetron, granisetron or the pharmaceutically acceptable salts thereof.
• a 5-HT 4 agonist may be selected from the group consisting of tegaserod, prucalopride or the pharmaceutically acceptable salts thereof.
• a mixed 5-HT 3 antagonist/5-HT 4 agonist may be selected from the group consisting of renzapride, cisapride or the pharmaceutically acceptable salts thereof.
• a serotonin norepinephrine reuptake inhibitor may be selected from the group consisting of venlafaxine, duloxetine and milnacipran or the pharmaceutically acceptable salts thereof.
• An antispasmotic agent may be selected from the group consisting of pinaverium, mebeverine, alverine or the pharmaceutically acceptable salts thereof.
• An anticholinergic may be selected from the group consisting of zamifenacin, darifenacin or the pharmaceutically acceptable salts thereof.
• a laxative may be selected from the group consisting of lactulose and polyethylene glycol.
• a ballast may be selected from the group consisting of methylcellulose and psyllium.
• An antidiarrheal may be selected from the group consisting of loperamide, cholestyramine or the pharmaceutically acceptable salts thereof.
• a tricyclic antidepressant and SSRI may be selected from the group consisting of amitriptyline, imipramine or the pharmaceutically acceptable salts thereof.
• An opioid may be selected from the group consisting of fedotozine, trimebutine or the pharmaceutically acceptable salts thereof.
• a local anaesthetic may be selected from the group consisting of trimebutine or the pharmaceutically acceptable salts thereof.
• An alpha2 agonist may be selected from the group consisting of clonidine or the pharmaceutically acceptable salts thereof.
• a cannabiniod may be selected from the group consisting of remonabant or the pharmaceutically acceptable salts thereof.
• a neurokinin antagonist may be selected from the group consisting of ezlopitant, nepadulant or the pharmaceutically acceptable salts thereof.
• a beta3-adrenoceptor agonist may be selected from the group consisting of solabegron or YM178 or the acceptable pharmaceutically acceptable salts thereof.
• a NSAID may be selected from the group consisting of acclofenac, acemetacin, acetylsalicylic acid, azathioprin, celecobix, diclofenac, diflunisal, fenbufen, fenoprofen, flurbiprofen, ibuprofen, indometacin, ketoprofen, leflunomid, lornoxicam, mefenamic acid, meloxicam, naproxen, phenylbutazon, piroxicam, sulfasalazin, zomepirac or the pharmaceutically acceptable salts thereof.
• a COX 2 inhibitor may be selected from the group consisting of meloxicam, rofecoxib, valdecoxib, parecoxib, etoricoxib, celecoxib or the pharmaceutically acceptable salts thereof.
• a probiotic may be bifidobacterium.
• the compounds prepared according to the invention may be administered either on their own or optionally in combination with other active substances for the treatment of migraine by intravenous, subcutaneous, intramuscular, intra-articular, intrarectal or intranasal route, by inhalation, topically, transdermally or orally, while aerosol formulations are particularly suitable for inhalation.
• the combinations may be administered either simultaneously or sequentially.
• Suitable forms for administration include for example tablets, capsules, solutions, syrups, emulsions or inhalable powders or aerosols.
• the proportion of pharmaceutically active compound or compounds should be in the range from 0.1 to 90% by weight, preferably 0.5 to 50% by weight of the total composition, i.e. in amounts which are sufficient to achieve the dosage range mentioned hereinbefore.
• the preparations may be given orally in the form of tablets, powders, powders in capsules (e.g. hard gelatine capsules), or as solutions or suspensions.
• the active substance combination When taken by inhalation the active substance combination may be administered as a powder, an aqueous or aqueous ethanolic solution or by means of a propellant gas formulation.
• pharmaceutical formulations are characterised in that they contain one or more compounds of formula I according to the preferred embodiments described hereinbefore.
• Suitable tablets may be obtained, for example, by mixing the active substances with known excipients, for example inert diluents such as calcium carbonate, calcium phosphate or lactose, disintegrants such as corn starch or alginic acid, binders such as starch or gelatine, lubricants such as magnesium stearate or talc and/or agents for delaying release, such as carboxymethyl cellulose, cellulose acetate phthalate, or polyvinyl acetate.
• the tablets may also comprise several layers.
• Coated tablets may be prepared accordingly by coating cores produced analogously to the tablets with substances normally used for tablet coatings, for example collidone or shellac, gum arabic, talc, titanium dioxide or sugar.
• the core may also consist of a number of layers.
• the tablet coating may consist of a number or layers to achieve delayed release, possibly using the excipients mentioned above for the tablets.
• Syrups containing the active substances or combinations thereof according to the invention may additionally contain a sweetener such as saccharine, cyclamate, glycerol or sugar and a flavour enhancer, e.g. a flavouring agent such as vanillin or orange extract. They may also contain suspension adjuvants or thickeners such as sodium carboxymethyl cellulose, wetting agents such as, for example, condensation products of fatty alcohols with ethylene oxide, or preservatives such as p hydroxybenzoates.
• a sweetener such as saccharine, cyclamate, glycerol or sugar
• a flavour enhancer e.g. a flavouring agent such as vanillin or orange extract.
• suspension adjuvants or thickeners such as sodium carboxymethyl cellulose, wetting agents such as, for example, condensation products of fatty alcohols with ethylene oxide, or preservatives such as p hydroxybenzoates.
• Capsules containing one or more active substances or combinations of active substances may for example be prepared by mixing the active substances with inert carriers such as lactose or sorbitol and packing them into gelatine capsules.
• Suitable suppositories may be made for example by mixing with carriers provided for this purpose, such as neutral fats or polyethyleneglycol or the derivatives thereof.
• Excipients which may be used include, for example, water, pharmaceutically acceptable organic solvents such as paraffins (e.g. petroleum fractions), vegetable oils (e.g. groundnut or sesame oil), mono- or polyfunctional alcohols (e.g. ethanol or glycerol), carriers such as e.g. natural mineral powders (e.g. kaolins, clays, talc, chalk), synthetic mineral powders (e.g. highly dispersed silicic acid and silicates), sugars (e.g. cane sugar, lactose and glucose), emulsifiers (e.g.
• pharmaceutically acceptable organic solvents such as paraffins (e.g. petroleum fractions), vegetable oils (e.g. groundnut or sesame oil), mono- or polyfunctional alcohols (e.g. ethanol or glycerol), carriers such as e.g. natural mineral powders (e.g. kaolins, clays, talc, chalk), synthetic mineral powders (e.g. highly disper
• lignin e.g. lignin, spent sulphite liquors, methylcellulose, starch and polyvinylpyrrolidone
• lubricants e.g. magnesium stearate, talc, stearic acid and sodium lauryl sulphate.
• the tablets may obviously contain, in addition to the carriers specified, additives such as sodium citrate, calcium carbonate and dicalcium phosphate together with various additional substances such as starch, preferably potato starch, gelatin and the like.
• Lubricants such as magnesium stearate, sodium lauryl sulphate and talc may also be used to produce the tablets.
• the active substances may be combined with various flavour enhancers or colourings in addition to the abovementioned excipients.
• the CGRP antagonists (A) are active in a model for visceral pain in rodents.
• hypersensitivity is induced by colonic irritation (e.g. by butyrate, trinitrobenzene sulfonic acid or acetic acid instillation).
• Colorectal balloon distension was applied to induce pain behaviour e.g. abdominal contractions (see Bourdu et al., Gastroenterology 2005, 128, 1996-2008; Diop et al., J. Pharmacol. Exp. Ther. 2002, 302, 1013-1022; Plourde et al. Am. J. Physiol. 1997, 273, G191-G196).
• the CGRP antagonists (A) according to the present invention can be used for the treatment of visceral pain/hypersensitivity especially abdominal pain in patients with IBS but also colic pain and dysmenorrhoea.

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