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Release of Calcitonin Gene—Related Peptide from Sensory Neurons a
Author(s) -
LUNDBERG JAN M.,
FRANCOCERECEDA ANDERS,
ALVING KJELL,
DELAYGOYET PHILIPPE,
LOU YAPING
Publication year - 1992
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1992.tb22767.x
Subject(s) - resiniferatoxin , capsaicin , calcitonin gene related peptide , chemistry , antidromic , trpv1 , stimulation , bradykinin , endocrinology , neuropeptide , medicine , receptor , sensory nerve , nociceptor , sensory neuron , calcitonin , pharmacology , sensory system , transient receptor potential channel , neuroscience , nociception , biology , biochemistry
CGRP is released from capsaicin-sensitive sensory neurons in a Ca(2+)-dependent manner in a variety of peripheral organs as well as from central terminals. The mechanisms for CGRP release by low concentrations of capsaicin, electrical antidromic nerve stimulation, and bradykinin have several similar characteristics regarding sensitivity to TTX, CTX, and alpha 2-adrenoceptor activation. High capsaicin concentration and nicotine evoke CGRP release via other mechanisms. The effects of capsaicin, resiniferatoxin, and SO2 are blocked by RR, which probably inhibits ion fluxes associated with capsaicin receptor activation. CGRP released upon irritation of peripheral branches of primary afferents may evoke a variety of cardiovascular actions and influence motility in the gastrointestinal and urogenital tracts.