Stretch-activated channels in stretch-induced muscle damage: role in muscular dystrophy.

Abstract:

:1. Stretch-induced muscle injury results in the damage that causes reduced force and increased membrane permeability. This muscle damage is caused, in part, by ionic entry through stretch-activated channels and blocking these channels with Gd3+ or streptomycin reduces the force deficit associated with damage. 2. Dystrophin-deficient muscles are more susceptible to stretch-induced muscle injury and the recovery from injury can be incomplete. We have found that Na+ entry associated with stretch-induced injury is enhanced in dystrophin-deficient muscles and that blockers of stretch-activated channels are capable of preventing ionic entry and reducing muscle damage. 3. A model is presented that proposes links between stretch-induced injury, opening of stretch-activated channels, increased levels of intracellular ions and various forms of muscle damage. Although changes in Na+ accompany stretch-induced muscle injury, we believe that changes in Ca2+ probably have a more central role in the damage process.

authors

Yeung EW,Allen DG

doi

10.1111/j.1440-1681.2004.04027.x

keywords:

subject

Has Abstract

pub_date

2004-08-01 00:00:00

pages

551-6

issue

8

eissn

0305-1870

issn

1440-1681

pii

CEP4040

journal_volume

31

pub_type

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