Cyclosporine A and NAC on the inducible nitric oxide synthase expression and nitric oxide synthesis in rat renal artery cultured cells

Cyclosporine A and NAC on the inducible nitric oxide synthase expression and nitric oxide synthesis in rat renal artery cultured cells

Autor Lessio, Camila Google Scholar
Silva, Fábio Assunção e Autor UNIFESP Google Scholar
Glória, Maria Aparecida da Autor UNIFESP Google Scholar
Di Tommaso, Ana Beatriz Galhardi Google Scholar
Mouro, Margareth Gori Autor UNIFESP Google Scholar
Di Marco, Giovana Seno Autor UNIFESP Google Scholar
Schor, Nestor Autor UNIFESP Google Scholar
Higa, Elisa Mieko Suemitsu Autor UNIFESP Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Resumo Background. the immunosuppressor cyclosporine A (CsA) presents the nephrotoxicity as its major side effect that is mostly attributed to a renal vasoconstriction. This may be due to an excessive generation of vasoconstrictors like reactive oxygen species (ROS), or due to a reduction of vasodilators such as the nitric oxide, which in turn, can be caused by increased amounts of ROS. We evaluated the effect of CsA and the antioxidant N-acetylcysteine (NAC) on inducible nitric oxide synthase (iNOS) mRNA expression and nitric oxide synthesis, in rat renal artery vascular smooth muscle cells (rVSMCs) primary culture.Methods. in cells treated during 72 hours with CsA (10 mu g/mL), its vehicle (control) (10 mu L/mL), Escherichia coli lipopolysaccharide (LPS) (100 mu g/mL), CsA + LPS, NAC (6.13 mmol/L), or CsA + NAC, we determined the nitric oxide synthesis ( Griess and chemiluminescence methods), iNOS expression [reverse transcription-polymerase chain reaction (RTPCR)] and cell viability (acridine orange method).Results. in rVSMCs, LPS increased nitric oxide and iNOS expression; CsA decreased basal and LPS-induced nitric oxide and iNOS expression; NAC increased nitric oxide and blunted the nitric oxide reduction caused by CsA, with no effect on iNOS. CsA reduced cell viability.Conclusion. in this study, CsA reduced nitric oxide synthesis in rVSMCs, both through iNOS down-regulation and reduction of cell viability, which could be responsible for the vasoconstrictive effect of the CsA. in the effect of CsA on nitric oxide, probably a role is also played by free radical production, as this effect was blunted by NAC.
Palavra-chave cyclosporine A
nitric oxide
nitric oxide synthase
renal artery cell culture
Idioma Inglês
Data de publicação 2005-12-01
Publicado em Kidney International. Oxford: Blackwell Publishing, v. 68, n. 6, p. 2508-2516, 2005.
ISSN 0085-2538 (Sherpa/Romeo, fator de impacto)
Publicador Blackwell Publishing
Extensão 2508-2516
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000233204300007
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