TRP Channels in the Digestive System

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Abstract:

Several of the 28 mammalian transient receptor potential (TRP) channel subunits are expressed throughout the alimentary canal where they play important roles in taste, chemo- and mechanosensation, thermoregulation, pain and hyperalgesia, mucosal function and homeostasis, control of motility by neurons, interstitial cells of Cajal and muscle cells, and vascular function. While the implications of some TRP channels, notably TRPA1, TRPC4, TRPM5, TRPM6, TRPM7, TRPV1, TRPV4, and TRPV6, have been investigated in much detail, the understanding of other TRP channels in their relevance to digestive function lags behind. The polymodal chemo- and mechanosensory function of TRPA1, TRPM5, TRPV1 and TRPV4 is particularly relevant to the alimentary canal whose digestive and absorptive function depends on the surveillance and integration of many chemical and physical stimuli. TRPV5 and TRPV6 as well as TRPM6 and TRPM7 appear to be essential for the absorption of Ca2+ and Mg2+, respectively, while TRPM7 appears to contribute to the pacemaker activity of the interstitial cells of Cajal, and TRPC4 transduces smooth muscle contraction evoked by muscarinic acetylcholine receptor activation. The implication of some TRP channels in pathological processes has raised enormous interest in exploiting them as a therapeutic target. This is particularly true for TRPV1, TRPV4 and TRPA1, which may be targeted for the treatment of several conditions of chronic abdominal pain. Consequently, blockers of these TRP channels have been developed, and their clinical usefulness has yet to be established.





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  • Current Pharmaceutical Biotechnology aims to cover all the latest and outstanding developments in Pharmaceutical Biotechnology. Each issue of the journal contains a series of timely in-depth reviews written by leaders in the field covering a range of current topics in both pre-clinical and clinical areas of Pharmaceutical Biotechnology. Current Pharmaceutical Biotechnology is an essential journal for academic, clinical, government and pharmaceutical scientists who wish to be kept informed and up-to-date with the latest and most important developments.
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