NPRA-mediated suppression of AngII-induced ROS production contribute to the antiproliferative effects of B-type natriuretic peptide in VSMC.
Mol Cell Biochem
; 324(1-2): 165-72, 2009 Apr.
Article
en En
| MEDLINE
| ID: mdl-19104909
ABSTRACT
Excessive proliferation of vascular smooth cells (VSMCs) plays a critical role in the pathogenesis of diverse vascular disorders, and inhibition of VSMCs proliferation has been proved to be beneficial to these diseases. In this study, we investigated the antiproliferative effect of B-type natriuretic peptide (BNP), a natriuretic peptide with potent antioxidant capacity, on rat aortic VSMCs, and the possible mechanisms involved. The results indicate that BNP potently inhibited AngiotensinII (AngII)-induced VSMCs proliferation, as evaluated by [(3)H]-thymidine incorporation assay. Consistently, BNP significantly decreased AngII-induced intracellular reactive oxygen species (ROS) and NAD(P)H oxidase activity. 8-Br-cGMP, a cGMP analog, mimicked these effects. To confirm its mechanism, siRNA of natriuretic peptide receptor-A(NRPA) strategy technology was used to block cGMP production in VSMCs, and siNPRA attenuated the inhibitory effects of BNP in VSMCs. Taken together, these results indicate that BNP was capable of inhibiting VSMCs proliferation by NPRA/cGMP pathway, which might be associated with the suppression of ROS production. These results might be related, at least partly, to the anti-oxidant property of BNP.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Angiotensina II
/
Receptores del Factor Natriurético Atrial
/
Especies Reactivas de Oxígeno
/
Péptido Natriurético Encefálico
/
Miocitos del Músculo Liso
/
Proliferación Celular
/
Músculo Liso Vascular
Límite:
Animals
Idioma:
En
Revista:
Mol Cell Biochem
Año:
2009
Tipo del documento:
Article
País de afiliación:
China