title: The distribution and influence of calcitonin gene-related peptide (CGRP) on the perfusion pressure in the isolated ovarian artery in the pig.
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 alpha-CGRP and its C-terminal fragment (Tyr27) alpha-CGRP(27-37) in the porcine isolated ovarian artery, collected on days 8-13 of the oestrous cycle. It was shown that alpha-CGRP (10(-8) M) caused a decrease in the perfusion pressure of the porcine isolated ovarian artery of 16% (p < 0.05), while (Tyr27) alpha-CGRP(27-37), added at the same concentration, reduced perfusion pressure by 13% (p > 0.05). Thus, we concluded that alpha-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.
authors.affiliation: Department of Pharmacology, Faculty of Veterinary Medicine, University of Warmia and Mazury, Olsztyn, Poland. mark@uwm.edu.pl
authors.forename: Włodzimierz
authors.initials: W
authors.lastname: Markiewicz
authors.forename: Jerzy J
authors.initials: JJ
authors.lastname: Jaroszewski
authors.forename: Beata
authors.initials: B
authors.lastname: Barszczewska
authors.forename: Tomasz
authors.initials: T
authors.lastname: Maślanka
authors.forename: Mariusz
authors.initials: M
authors.lastname: Majewski
mesh_terms: D000818:Animals; D001158:Arteries / Q000187:drug effects* / Q000378:metabolism*; D015740:Calcitonin Gene-Related Peptide / Q000378:metabolism* / Q000494:pharmacology*; D030762:Estrous Cycle / Q000502:physiology; D005260:Female; D066298:In Vitro Techniques; D010053:Ovary / Q000098:blood supply*; D010477:Perfusion; D012039:Regional Blood Flow / Q000187:drug effects / Q000502:physiology; D013552:Swine; D014664:Vasodilation / Q000187:drug effects
chemical_list: C446021:calcitonin gene-related peptide (27-37):; D015740:Calcitonin Gene-Related Peptide