Brain natriuretic peptide enhances the endothelium-independent cAMP and vasorelaxant responses of calcitonin gene-related peptide in rat aorta
Neuropeptides, ISSN: 0143-4179, Vol: 32, Issue: 6, Page: 499-509
1998
- 7Citations
- 5Captures
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Article Description
Calcitonin gene-related peptide (CGRP) causes vasorelaxation in rat aorta involving endothelium/nitric oxide (NO)-dependent elevations of both cAMP and cGMP levels. When endothelium is removed, preincubation with exogenous NO uncovers and potentiates direct (endothelium-independent) cAMP elevations and vasorelaxations caused by CGRP. This enhancing effect of NO potentially involves elevation of cGMP and inhibition of Type III (cGMPinhibitable) phosphodiesterase, causing accumulation of cAMP. However, NO may have other actions. The aim of the present study was to determine if brain natriuretic peptide (BNP), which elevates cGMP levels independent of NO, could enhance cAMP accumulations and vasorelaxations induced by CGRP in rat aortic rings denuded of endothelium. When added separately, neither CGRP (100 nM) nor BNP (10 nM) altered cAMP levels. When added in combination, CGRP (100 nM) and BNP (10 nM) significantly elevated cAMP levels (from control of 0.95 ± 0.08 to 1.53 ± 0.09 pmol/mg protein) at 2 min. BNP (10 nM) elevated cGMP levels 10-fold at 2 min and this response was not altered by co-administration of CGRP (100 nM).
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0143417998900786; http://dx.doi.org/10.1016/s0143-4179(98)90078-6; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0032435393&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/9920447; http://linkinghub.elsevier.com/retrieve/pii/S0143417998900786; http://api.elsevier.com/content/article/PII:S0143417998900786?httpAccept=text/xml; http://api.elsevier.com/content/article/PII:S0143417998900786?httpAccept=text/plain; https://linkinghub.elsevier.com/retrieve/pii/S0143417998900786; http://dx.doi.org/10.1016/s0143-4179%2898%2990078-6; https://dx.doi.org/10.1016/s0143-4179%2898%2990078-6
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