共 26 条
Hypoxia inhibition of apoptosis induced by tumor necrosis factor-related apoptosis-inducing ligand (TRAIL)
被引:71
作者:

Park, SY
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机构:
Univ Pittsburgh, Sch Med, Dept Surg, Pittsburgh, PA 15261 USA Univ Pittsburgh, Sch Med, Dept Surg, Pittsburgh, PA 15261 USA

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Seol, DW
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机构:
Univ Pittsburgh, Sch Med, Dept Surg, Pittsburgh, PA 15261 USA Univ Pittsburgh, Sch Med, Dept Surg, Pittsburgh, PA 15261 USA
机构:
[1] Univ Pittsburgh, Sch Med, Dept Surg, Pittsburgh, PA 15261 USA
关键词:
TRAIL;
hypoxia;
apoptosis;
Bcl-2;
D O I:
10.1006/bbrc.2002.6421
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
Hypoxia is a common environmental stress. Particularly, the center of rapidly growing solid tumors is easily exposed to hypoxic conditions. Thus, tumor cell response to hypoxia plays an important role in tumor progression as well as tumor therapy. However, little is known about hypoxic effect on apoptotic cell death. To examine the effects of hypoxia on TRAIL-induced apoptosis, human lung carcinoma A549 cells were exposed to hypoxia and treated with TRAIL protein. Hypoxia significantly protected A549 cells from apoptosis induced by TRAIL. Western blotting analysis demonstrated that hypoxia increased expression of antiapoptotic proteins such as Bcl-2, Bel-XL, and IAP family members. The increase of these antiapoptotic molecules is believed to play an hypoxia-mediated protective role in TRAIL-induced apoptosis. Our findings suggest that an increase of antiapoptotic proteins induced by hypoxia may regulate the therapeutic activity of TRAIL protein in cancer therapy. (C) 2002 Elsevier Science (USA).
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页码:150 / 153
页数:4
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