Calcitonin gene-related peptide (CGRP) is a 37-amino-acid neuropeptide belonging to the calcitonin gene peptide superfamily. CGRP is a potent vasodilator with potential therapeutic usefulness for treating vascular-related disease. This peptide is primarily located on C- and Aδ-fibers, which have extensive perivascular presence and a dual sensory-efferent function. Although CGRP has two major is...

Calcitonin gene-related peptide (CGRP) is a 37-amino acid neuropeptide localized in the eye in the sensory nerves. In this study, the physiological effects of the two naturally occurring forms of human CGRP, CGRP-I, and -II, which differ only in three amino acids, have been demonstrated in the rabbit eye and cardiovascular system. Intravenously administered CGRP-I caused a biphasic increase in ...

Calcitonin gene-related peptide (CGRP) may play a role in regulation of pulmonary vascular tone in adults. We set out to establish whether or not CGRP has any effect on the fetal pulmonary circulation. Hemodynamic effects of exogenous CGRP were studied in seven near-term fetal sheep. Single CGRP injections into left pulmonary artery (LPA), compared with acetylcholine, and five repeated CGRP inj...

Although studies have indicated that calcitonin gene-related peptide (CGRP), a potent vasodilatory peptide, is upregulated after endotoxic shock, it remains controversial whether this peptide increases during sepsis and, if so, whether the gut is a significant source of CGRP under such conditions. To study this, polymicrobial sepsis was induced by cecal ligation and puncture (CLP) followed by f...

Calcitonin gene-related peptide (CGRP) is present in sensory nerve fibers in the heart and around peripheral arteries. On interaction with specific CGRP binding sites and activation of adenylate cyclase, CGRP causes vasodilation and has positive inotropic and chronotropic effects on the heart. In the present study, human CGRP I and II exerted positive inotropic effects on isolated human right a...

A moderate number of delicate CGRP-immunoreactive (CGRP-IR) varicose nerve terminals were found at the adventitia-media border of the sexually mature porcine ovarian artery by means of a routine single immunolabelling technique. Additionally, a pharmacological analysis was performed of the function fulfilled by alpha-CGRP and its C-terminal fragment (Tyr27) alpha-CGRP(27-37) in the porcine isol...

Few studies have investigated the role calcitonin gene-related peptide (CGRP) plays in the process of spinal fusion. The aim of the present study is to observe the temporal and spatial changes of CGRP induced by experimental fusion surgery in rats and elucidate the role of CGRP in spinal fusion. Male Sprague-Dawley rats were used in the study and the specimens were collected on the 7th, 14th, 2...

CGRP is localized in primary spinal afferent C and Ad fibers of the sensory ganglia and in the CNS, for example, in the colliculi and cerebellum. Trigeminal nerve activation results in antidromic release of CGRP that leads to vasodilatation via a CGRP-receptor complex (calcitonin-like receptor and RAMP1). At central synapses in the trigeminal nucleus caudalis, CGRP on second-order neurons trans...

Calcitonin gene-related peptide (CGRP) is a 37-amino acid neuropeptide produced by tissue-specific alternative splicing of the primary transcript of the calcitonin/CGRP gene. CGRP is widely distributed in the central and peripheral neuronal systems and exhibits numerous biological activities in mammals. Recently, it was clarified that endogenous CGRP released from primary afferent neurons facil...

In the present study, a recombinant adeno-associated virus vector containing the calcitonin gene related peptide gene (rAAV-CGRP) was constructed and the therapeutic effect of rAAV-CGRP on a chick umbilical artery vasospasm model induced by chick embryo allantoic cavity hemorrhage was investigated. Fresh specific pathogen-free fertilized chicken eggs were randomly divided into a rAAV-CGRP group...