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Title: Calcitonin gene-related peptide does not interact with sympathetic activity in myocardial ischemia. Author: Burgdorf C, Dendorfer A, Kurz T, Richardt G. Journal: Regul Pept; 2005 Feb 15; 125(1-3):99-102. PubMed ID: 15582720. Abstract: The aim of the present study was to assess whether calcitonin gene-related peptide (CGRP) modulates exocytotic norepinephrine release in ischemic myocardium. In isolated rat hearts subjected to 30 min of low flow ischemia, CGRP release increased 2.8-fold whereas stimulation-induced norepinephrine release decreased 4.1-fold. Pretreatment of rats with capsaicin almost completely depleted cardiac CGRP stores; however, suppression of norepinephrine release by 30 min of low flow ischemia was not affected. At normal flow, exogenous CGRP (5 micromol l-1) had no effect on norepinephrine release. These findings suggest that CGRP release from sensory neurons does not interact with the cardiac sympathetic system during myocardial ischemia.[Abstract] [Full Text] [Related] [New Search]