Title : Vanilloid type 1 receptors (VR1) on trigeminal sensory nerve fibres play a minor role in neurogenic dural vasodilatation, and are involved in capsaicin-induced dural dilation.

Pub. Date : 2003 Oct

PMID : 14534154






7 Functional Relationships(s)
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1 Capsaicin induces calcitonin gene-related peptide (CGRP) release when VR1 receptors are activated, and this can be reversed by both the VR1 receptor antagonist capsazepine and the CGRP blocker alphaCGRP8-37 in vitro. Capsaicin calcitonin related polypeptide alpha Homo sapiens
2 Capsaicin induces calcitonin gene-related peptide (CGRP) release when VR1 receptors are activated, and this can be reversed by both the VR1 receptor antagonist capsazepine and the CGRP blocker alphaCGRP8-37 in vitro. Capsaicin calcitonin related polypeptide alpha Homo sapiens
3 Capsaicin induces calcitonin gene-related peptide (CGRP) release when VR1 receptors are activated, and this can be reversed by both the VR1 receptor antagonist capsazepine and the CGRP blocker alphaCGRP8-37 in vitro. Capsaicin calcitonin related polypeptide alpha Homo sapiens
4 We also looked at the effect of the CGRP blocker alphaCGRP8-37 (300 microg x kg-1) on capsaicin-induced dilation so that we could see if the results found in vitro could also be found in vivo. Capsaicin calcitonin related polypeptide alpha Homo sapiens
5 AlphaCGRP8-37 also inhibited the capsaicin-induced dilation (t5=7.4, P<0.05) probably inhibiting the action of released CGRP at the CGRP receptor. Capsaicin calcitonin related polypeptide alpha Homo sapiens
6 AlphaCGRP8-37 also inhibited the capsaicin-induced dilation (t5=7.4, P<0.05) probably inhibiting the action of released CGRP at the CGRP receptor. Capsaicin calcitonin related polypeptide alpha Homo sapiens
7 The study demonstrates that capsaicin can repeatedly induce dural vessel dilation in vivo, presumably through inducing CGRP release from trigeminal sensory nerve fibres, while C-fibres may have been desensitised. Capsaicin calcitonin related polypeptide alpha Homo sapiens