SIRT1 deficiency attenuates MPP+-induced apoptosis in dopaminergic cells.
FEBS Lett
; 585(1): 219-24, 2011 Jan 03.
Article
em En
| MEDLINE
| ID: mdl-21130087
ABSTRACT
One of the functions mediated by sirtuin 1 (SIRT1), the NAD(+)-dependent protein deacetylase, has been suggested to be neuroprotective since resveratrol, a SIRT1 activator, inhibits 1-methyl-4-phenylpyridinium ion (MPP(+))-induced cytotoxicity. In this study, we show that SIRT1 siRNA transfection blocks MPP(+)-induced apoptosis in SH-SY5Y cells. The ratio of potential pro-apoptotic BNIP2 to antiapoptotic BCL-xL was attenuated in SIRT1-deficient cells following MPP(+) treatment. In addition, BNIP2 shRNA-transfected cells showed reduced cleavage of PARP-1, while BNIP2 overexpression intensified the cleavage in MPP(+)-treated SH-SY5Y cells, suggesting that BNIP2 participates in the MPP(+)-induced apoptosis. Overall, these data imply that SIRT1 may mediate MPP(+)-induced cytotoxicity, possibly through the regulation of BNIP2.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Transporte
/
1-Metil-4-fenilpiridínio
/
Apoptose
/
Sirtuína 1
Limite:
Humans
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article