Title : Involvement of endogenous tachykinins and CGRP in the motor responses produced by capsaicin in the guinea-pig common bile duct.

Pub. Date : 1999 Sep

PMID : 10543438






7 Functional Relationships(s)
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1 Involvement of endogenous tachykinins and CGRP in the motor responses produced by capsaicin in the guinea-pig common bile duct. Capsaicin calcitonin related polypeptide alpha Homo sapiens
2 Human calcitonin gene-related peptide (h-CGRP; 0.1 microM) mimicked the effect of capsaicin on resting preparations (contractile response =28% of KCl 80 mM). Capsaicin calcitonin related polypeptide alpha Homo sapiens
3 h-CGRP (8-37) (1.5 microM) almost completely reversed the relaxations produced by both capsaicin and h-CGRP. Capsaicin calcitonin related polypeptide alpha Homo sapiens
4 In vivo pretreatment with capsaicin (50 mg/kg; 6-7 days before) decreased the number of CGRP-IR nerves, whereas the TK-IR neural network was apparently unchanged. Capsaicin calcitonin related polypeptide alpha Homo sapiens
5 In conclusion, our data provide functional evidence for the presence of capsaicin-sensitive primary afferent nerve endings in the guinea-pig terminal biliary tract, whose stimulation by capsaicin or EFS produces the release of tachykinins and CGRP. Capsaicin calcitonin related polypeptide alpha Homo sapiens
6 In conclusion, our data provide functional evidence for the presence of capsaicin-sensitive primary afferent nerve endings in the guinea-pig terminal biliary tract, whose stimulation by capsaicin or EFS produces the release of tachykinins and CGRP. Capsaicin calcitonin related polypeptide alpha Homo sapiens
7 The contractile response to capsaicin obtained in the presence of the three tachykinin receptor antagonists could be due to the co-released CGRP and/or to other unknown neurotransmitters. Capsaicin calcitonin related polypeptide alpha Homo sapiens