Vol 63, No 1 (2004)
Short communication
Published online: 2003-12-03
The distribution and influence of calcitonin gene-related peptide (CGRP) on the perfusion pressure in the isolated ovarian artery in the pig
Folia Morphol 2004;63(1):99-101.
Abstract
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 α-CGRP and its C-terminal fragment (Tyr27) α-CGRP(27-37) in the porcine
isolated ovarian artery, collected on days 8–13 of the oestrous cycle. It was shown
that α-CGRP (10-8 M) caused a decrease in the perfusion pressure of the porcine
isolated ovarian artery of 16% (p < 0.05), while (Tyr27) α-CGRP(27-37), added
at the same concentration, reduced perfusion pressure by 13% (p > 0.05).
Thus, we concluded that α-CGRP released from perivascular terminals may cause
relaxation of the ovarian artery and, furthermore, that the potency of this action
is dependent on the length of the chain of this peptide produced during the
deactivation of the molecule by tissue proteases.
Keywords: alpha-CGRP(Tyr27)alpha-CGRP(27-37)ovarian arteryperfusion
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