Apoptosis of human hepatoma cell lines induced by transforming growth factor beta 1 (TGF-β1) correlates with p53 and Smad4 activation / 北京大学学报(医学版)
Journal of Peking University(Health Sciences)
;
(6): 176-178, 2006.
Artigo
em Chinês
| WPRIM
| ID: wpr-408708
ABSTRACT
Objective:
To determine the relationships between apoptosis induced by transforming growth factor beta 1 (TGF-β1) and Smad in human hepatoma cell lines.Methods:
Three human hepatic carcinoma cell lines, involving different status of the p53 gene respectively, were used in this study.TGF-β1-induced apoptosis in hepatic carcinoma cell lines was quantitated using the terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) assay. For identification of the mechanism of apoptosis induced by TGF-β1, these cell lines were transfected with a TGF-β1-inducible luciferase reporter plasmid containing Smad binding elements (SBE) and luciferase gene using LF2000, then were treated with TGF-β1. Relative luciferase activity was assayed respectively.Results:
Among three cell lines studied with TUNEL assay, addition of TGF-β1 induced apoptosis only in HepG2 cells (wild type p53). In contrast, Huh-7 ( mutant p53) and Hep3B ( deleted p53) cell lines lacked apoptosis. The detection of luciferase activity indicated that HepG2 cells dramatically increased the response to TGF-β1 induction, Huh-7 and Hep3B cell lines significantly lowered luciferase expression.Conclusion:
HepG2cells were highly susceptible to TGF-β1-induced apoptosis compared with Hep3B and Huh-7 cell lines.Smad4 may be a central mediator of the TGF-β1 signaling transdution pathway.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Tipo de estudo:
Estudo prognóstico
Idioma:
Chinês
Revista:
Journal of Peking University(Health Sciences)
Ano de publicação:
2006
Tipo de documento:
Artigo
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