Integrins and modulation of transmitter release from motor nerve terminals by stretch - PubMed (original) (raw)

. 1995 Sep 15;269(5230):1578-80.

doi: 10.1126/science.7667637.

Affiliations

• PMID: 7667637
• DOI: 10.1126/science.7667637

Integrins and modulation of transmitter release from motor nerve terminals by stretch

B M Chen et al. Science. 1995.

Abstract

The stretch of a frog muscle within the physiological range can more than double the spontaneous and evoked release of neurotransmitter from its motor nerve terminals. Here, stretch enhancement of release was suppressed by peptides containing the sequence arginine-glycine-aspartic acid (RGD), which blocks integrin binding. Integrin antibodies also inhibited the enhancement obtained by stretching. Stretch enhancement depended on intraterminal calcium derived both from external calcium and from internal stores. Muscle stretch thus might enhance the release of neurotransmitters either by elevating internal calcium concentrations or by increasing the sensitivity of transmitter release to calcium in the nerve terminal.

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