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Review article: visceral hypersensitivity in irritable bowel syndrome: molecular mechanisms and therapeutic agents Akbar A; Walters JR; Ghosh SAliment Pharmacol Ther 2009[Sep]; 30 (5): 423-35BACKGROUND: Although development of visceral pain is an important defensive mechanism, hypersensitivity results in a significant clinical problem and is likely to be one of the major factors involved in the pathogenesis of abdominal and chest pain in functional bowel disorders (FBDs). Understanding of the molecular mechanisms involved in peripheral sensitization of visceral nociceptors has advanced as a result of the experimental studies, especially in animal models, which have led to knowledge and identification of key mediators and receptors. AIM: To provide a comprehensive review focused on the peripheral mechanisms believed to be responsible for sensitization and potential molecular targets for a disorder which is common, distressing and has sub-optimal treatment options. METHODS: Literature review using Ovid and Pubmed from 1966. RESULTS: There is substantial interest in the development of new drugs for treatment of FBDs in the background of advances in understanding the molecular and physiological mechanisms of visceral hypersensitivity. The potential drug targets include TPRV1, ASICs, voltage-gated sodium channels, ATP, PAR-2, cannabinoid, prostaglandin, tachykinin and 5HT(3) receptors. CONCLUSION: It is anticipated that with advancing molecular understanding of the basis of visceral hypersensitivity, the next decade will see accelerated development of new molecules for treatment of functional bowel diseases.|Calcitonin Gene-Related Peptide/*antagonists & inhibitors/therapeutic use[MESH]|Humans[MESH]|Hypersensitivity/drug therapy/*physiopathology[MESH]|Irritable Bowel Syndrome/drug therapy/*physiopathology[MESH]|Nociceptors[MESH]|Pain/drug therapy/*physiopathology[MESH]|Receptors, Prostaglandin/therapeutic use[MESH]|Receptors, Proteinase-Activated/therapeutic use[MESH]|Sodium Channels/therapeutic use[MESH]|TRPV Cation Channels/therapeutic use[MESH]|Visceral Afferents/*physiopathology[MESH] |
