Expression of p53 in Saos-2 osteosarcoma cells induces apoptosis which can be inhibited by Bcl-2 or the adenovirus E1B-55 kDa protein

被引:0
|
作者
Marcellus, RC
Teodoro, JG
Charbonneau, R
Shore, GC
Branton, PE
机构
[1] MCGILL UNIV,DEPT BIOCHEM,MONTREAL,PQ H3G 1Y6,CANADA
[2] MCGILL UNIV,DEPT ONCOL,MONTREAL,PQ H3G 1Y6,CANADA
来源
CELL GROWTH & DIFFERENTIATION | 1996年 / 7卷 / 12期
关键词
D O I
暂无
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Studies were carried out to determine the effects of introducing p53 using an adenovirus gene transfer vector into p53 null human Saos-2 osteogenic carcinoma cells. Expression of p53 led to cell death within 30-40 h. The morphology of these cells as determined by electron microscopy indicated that death was by apoptosis. Such death was significantly reduced in Saos-2 variants that express high levels of the Bcl-2 suppressor of apoptosis. It was also found that the E1B-55 kDa protein of human adenovirus type 5, which was known to bind and inactivate p53, blocks Saos-2 cell death following expression of p53. These results thus directly demonstrate that this viral protein is able to inhibit p53-induced apoptosis.
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页码:1643 / 1650
页数:8
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