Promotion of pulmonary fibroblast proliferation and apoptosis by sodium nitroprusside.
Sheng Li Xue Bao
; 53(6): 483-9, 2001 Dec.
Article
em En
| MEDLINE
| ID: mdl-11930231
ABSTRACT
The effects of nitric oxide (NO) donor sodium nitroprusside (SNP) on the proliferation and apoptosis and on Bcl-2, Bax and p53 proteins of pulmonary fibroblasts were investigated by using MTT cleavage assay, agarose gel electrophoresis and flow cytometric analysis. The results showed increases in the optical density (550 nm) of MTT cleavage assay, the number of cells and the proliferation index (PI), in comparison with the control. The number of apoptotic cells was also increased, though the percentage of apoptotic cells was too low to reveal oligonucleosomal fragmentation of characteristic ladder pattern, which is associated with apoptosis. In the meantime, the level of Bcl-2 decreased and that of Bax increased, while the p53 remained unchanged. These results suggest that exogenous NO has a dual effect on proliferation and apoptosis; and the action of NO on pulmonary fibroblasts is mainly proliferative. Down regulation of Bcl-2 and up regulation of Bax are implicated in the molecular mechanisms of this action.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Nitroprussiato
/
Apoptose
/
Doadores de Óxido Nítrico
/
Fibroblastos
/
Pulmão
Limite:
Animals
Idioma:
En
Revista:
Sheng Li Xue Bao
Ano de publicação:
2001
Tipo de documento:
Article