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 μmol 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.

Original languageEnglish
JournalRegulatory Peptides
Issue number1-3
Pages (from-to)99-102
Number of pages4
Publication statusPublished - 15.02.2005

Research Areas and Centers

  • Academic Focus: Center for Brain, Behavior and Metabolism (CBBM)


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