期刊
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
卷 378, 期 4, 页码 821-825出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2008.11.147
关键词
STAT3; Serpin B3/B4 squamous cancer
资金
- NIH [AI32489, AI32440]
Persistently activated STAT3 contributes to cell survival in many different human cancers. Cancer cell secretion of IL-6 is a frequent basis for persistent STAT3 activation; we show that antibodies against signaling unit of the IL-6 receptor, can abruptly remove persistently activated causing prompt disappearance of cysteine proteases of serpin B3/B4 mRNAs, known as squamous cell carcinoma antigens 1 and 2. STAT3 occupies the promoter of serpin B3/B4 before removal and siRNA removal of B3/B4 mRNA caused cell death in HN13 head and neck cancer cells. Thus persistently activated STAT3 is a required part of the continuous activation of B3/B4 genes, which protects tumor cells from (C) 2008 Elsevier Inc. All rights reserved.
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