Inactivating mutation of the pro-apoptotic gene BID in gastric cancer

被引:46
作者
Lee, JH [1 ]
Soung, YH [1 ]
Lee, JW [1 ]
Park, WS [1 ]
Kim, SY [1 ]
Cho, YG [1 ]
Kim, CJ [1 ]
Seo, SH [1 ]
Kim, HS [1 ]
Nam, SW [1 ]
Yoo, NJ [1 ]
Lee, SH [1 ]
Lee, JY [1 ]
机构
[1] Catholic Univ Korea, Coll Med, Dept Pathol, Socho Gu, Seoul 137701, South Korea
关键词
BID; mutation; gastric cancer; apoptosis;
D O I
10.1002/path.1532
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
There is evidence that deregulation of apoptosis is mechanistically involved in cancer development and somatic mutations of apoptosis-related genes have been reported in human cancers. BID, a pro-apoptotic member of the Bcl-2 family, interconnects the extrinsic apoptosis pathway initiated by death receptors to the intrinsic apoptosis pathway. To explore the possibility that genetic alterations of BID might be involved in the development of human cancers, this study analysed the entire coding region and all splice sites in the human BID gene in 67 advanced gastric carcinomas. Overall, four BID mutations (6.0%) were detected that consisted of one frameshift and three missense mutations. The tumour-derived BID mutants were expressed in 293T cells and it was found that, compared with wild-type BID, the frequency of apoptosis was significantly reduced in cells expressing the gene containing the frameshift mutation. Furthermore, expression of the inactivating frameshift mutant interfered with cell death by overexpression of death receptors, indicating that this mutant inhibits the extrinsic apoptosis pathway in a dominant-negative fashion. Also, the frameshift mutation rendered cancer cells resistant to apoptosis induced by the anti-cancer drug 5-fluorouracil (5-FU). This is the first report of BID gene mutation in human malignancy. The data suggest that such mutations occur rarely in gastric cancers and that only a small fraction of BID mutations may lead to the loss of its apoptotic function. Copyright (C) 2004 Pathological Society of Great Britain and Ireland. Published by John Wiley Sons, Ltd.
引用
收藏
页码:439 / 445
页数:7
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