Modulation of postjunctional α-adrenergic responsiveness by local changes in temperature

Author:

Vanhoutte P. M.1,Cooke J. P.1,Lindblad L.-E.1,Shepherd J. T.1,Flavahan N. A.1

Affiliation:

1. Department of Physiology and Biophysics, Mayo Clinic and Mayo Foundation, Rochester, Minnesota, U.S.A.

Abstract

1. In canine cutaneous veins, local moderate warming (37°-41°C) augments the responsiveness to postjunctional α1-adrenergic stimulation but depresses that to postjunctional α2-adrenergic activation. Moderate cooling (37°-24°C) has the opposite effect. 2. The effects of warming and cooling on α1-adrenergic responses are buffered by a large receptor reserve, allowing for the predominance of alterations in α2-adrenergic responsiveness.

Publisher

Portland Press Ltd.

Subject

Ocean Engineering

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