Pharmacological and transcriptomic characterization of the nitric oxide pathway in aortic rings isolated from the tortoise Chelonoidis carbonaria.

Autor: Campos R; Superior Institute of Biomedical Sciences, Ceará State University (UECE), Fortaleza, Brazil; Faculty of Medical Sciences, Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil. Electronic address: rafael.campos@uece.br., Justo AFO; Faculty of Medical Sciences, Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil., Jacintho FF; Faculty of Medical Sciences, Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil., Mónica FZ; Faculty of Medical Sciences, Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil., Rojas-Moscoso JA; Faculty of Medical Sciences, Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil., Moreno RA; Faculty of Medical Sciences, Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil., Napolitano M; Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo, Brazil., Cogo JC; Faculty of Biomedical Engineering, Brazil University, Itaquera, Brazil., De Nucci G; Faculty of Medical Sciences, Department of Pharmacology, University of Campinas (UNICAMP), Campinas, Brazil; Institute of Biomedical Sciences, University of São Paulo (USP), São Paulo, Brazil.
Jazyk: angličtina
Zdroj: Comparative biochemistry and physiology. Toxicology & pharmacology : CBP [Comp Biochem Physiol C Toxicol Pharmacol] 2019 Aug; Vol. 222, pp. 82-89. Date of Electronic Publication: 2019 Apr 24.
DOI: 10.1016/j.cbpc.2019.04.015
Abstrakt: In this study the nitric oxide (NO)-soluble guanylate cyclase (sGC) and phosphodiesterase-5 (PDE-5) pathway was characterized in tortoise Chelonoidis carbonaria aorta. Concentration response curves (CCR) to ATP, ADP, AMP, adenosine and histamine were performed in the presence and absence of L-NAME in aorta pre-contracted with ACh (3 μM). CCR to SNP, BAY 41-2272 (sGC stimulator), BAY 60-2770 (sGC activator) and tadalafil (PDE-5 inhibitor) were constructed in the presence and absence of ODQ (10 μM). ATP (pEC 50 6.1 ± 0.1), ADP (pEC 50 6.0 ± 0.2), AMP (pEC 50 6.8 ± 0.1) and histamine (pEC 50 6.8 ± 0.12) relaxed Chelonoidis aorta and the addition of L-NAME reduced their efficacy (p < .05). Adenosine effects (pEC 50 6.6 ± 0.1) were not changed in the presence of L-NAME. SNP (pEC 50 7.5 ± 0.7; Emax 102.2 ± 2.5%), BAY 41-2272 (pEC 50 7.3 ± 0.2; Emax 130.3 ± 10.2%), BAY 60-2770 (pEC 50 11.4 ± 0.1; Emax 130.3 ± 6.5%) and tadalafil (pEC 50 6.7 ± 0.3; Emax 121.3 ± 15.3%) relaxed Chelonoidis aorta. The addition of ODQ reduced the SNP and tadalafil maximum response (p < .05) and promoted 63 fold right shift on BAY 41-2272 curve. In contrast, no alteration was observed on BAY 60-2770 response. Transcriptomic analysis for eNOS and sGC were found in aorta and brain libraries with high homology when compared with human transcripts. The NO-sGC-PDE-5 is functionally present in Chelonoidis aorta with a functional and genomic similarity to mammalian vessels. Unlike most of mammalian vessels, ACh did not cause endothelium-dependent relaxation in Chelonoidis carbonaria aortic rings.
(Copyright © 2019 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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