IngentaConnect EMERGING FUNCTIONS OF 10 TYPES OF TRP CATIONIC CHANNEL IN VASCULA...

Author: Beech, David J¹

Source: Clinical and Experimental Pharmacology and Physiology, Volume 32, Number 8, August 2005 , pp. 597-603(7)

Abstract:

SUMMARY

1. The influx of Ca²⁺, Mg²⁺ and Na⁺ and the efflux of K⁺ have central importance for the function and survival of vascular smooth muscle cells, but progress in understanding the influx/efflux pathways has been restricted by a lack of identification of the genes underlying many of the non-voltage-gated cationic channels.

2. The present review highlights evidence suggesting the genes are mammalian homologues of the Transient Receptor Potential (TRP) gene of the fruit-fly Drosophila. The weight of evidence supports roles for TRPC1, TRPP2/1 and TRPC6, but recent studies point also to TRPC3, TRPC4/5, TRPV2, TRPM4 and TRPM7.

3. Activity of these TRP channels is suggested to modulate contraction and sense changes in intracellular Ca²⁺ storage, G-protein-coupled receptor activation and osmotic stress. Roles in relation to myogenic tone, actions of vasoconstrictors substances, Mg²⁺ homeostasis and the vascular injury response are suggested.

4. Knowledge that TRP channels are relevant to vascular smooth muscle cells in both their contractile and proliferative phenotypes should pave the way for a better understanding of vascular biology and provide the basis for the discovery of a new set of therapeutic agents targeted to vascular disease.

Keywords: artery; blood vessel; calcium channel; cationic channel; smooth muscle; transient receptor potential; vein

Document Type: Review article

DOI: 10.1111/j.1440-1681.2005.04251.x

Affiliations: 1: Membrane Biology Research Group, School of Biomedical Sciences, University of Leeds, Leeds, UK

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EMERGING FUNCTIONS OF 10 TYPES OF TRP CATIONIC CHANNEL IN VASCULAR SMOOTH MUSCLE