Xiaojian Wang;楠 李;Bin Liu;Hongying Sun;Taoyong Chen;Hongzhe Li;Jianming Qiu;Lihuang Zhang;涛 万;雪涛 曹
Zhejiang University;China Association for Science and Technology;Second Military Medical University
发表时间:2004-10-29
期 刊:Journal of Biological Chemistry
语 言:English
U R L: http://www.scopus.com/inward/record.url?scp=8544229212&partnerID=8YFLogxK
The phosphatidylethanolamine (PE)-binding proteins (PEBPs) are an evolutionarily conserved family of proteins with pivotal biological functions. Here we describe the cloning and functional characterization of a novel family member, human phosphatidylethanolamine-binding protein 4 (hPEBP4). hPEBP4 is expressed in most human tissues and highly expressed in tumor cells. Its expression in tumor cells is further enhanced upon tumor necrosis factor (TNF) α treatment, whereas hPEBP4 normally co-localizes with lysosomes, TNFα stimulation triggers its transfer to the cell membrane, where it binds to Raf-1 and MEK1. L929 cells overexpressing hPEBP4 are resistant to both TNFα-induced ERK1/2, MEK1, and JNK activation and TNFα-mediated apoptosis. Co-precipitation and in vitro protein binding assay demonstrated that hPEBP4 interacts with Raf-1 and MEK1. A truncated form of hPEBP4, lacking the PE-binding domain, maintains lysosomal co-localization but has no effect on cellular responses to TNFα. Given that MCF-7 breast cancer cells expressed hPEBP4 at a high level, small interfering RNA was used to silence the expression of hPEBP4. We demonstrated that down-regulation of hPEBP4 expression sensitizes MCF-7 breast cancer cells to TNFα-induced apoptosis. HPEBP4 appears to promote cellular resistance to TNF-induced apoptosis by inhibiting activation of the Raf-1/MEK/ERK pathway, JNK, and PE externalization, and the conserved region of PE-binding domain appears to play a vital role in this biological activity of hPEBP4.
Scopus度量
年份 | CiteScore | SJR | SNIP |
---|---|---|---|
1996 | |||
1997 | |||
1998 | |||
1999 | 6.161 | 1.611 | |
2000 | 5.435 | 1.559 | |
2001 | 4.869 | 1.505 | |
2002 | 4.494 | 1.42 | |
2003 | 4.512 | 1.416 | |
2004 | 4.376 | 1.42 | |
2005 | 4.178 | 1.351 | |
2006 | 4.352 | 1.379 | |
2007 | 4.338 | 1.379 | |
2008 | 4.375 | 1.362 | |
2009 | 4.235 | 1.348 | |
2010 | 3.998 | 1.341 | |
2011 | 8.3 | 3.544 | 1.253 |
2012 | 8.3 | 3.396 | 1.235 |
2013 | 8.9 | 3.402 | 1.218 |
2014 | 8.8 | 3.258 | 1.201 |
2015 | 8.8 | 3.126 | 1.18 |
2016 | 8.5 | 2.825 | 1.129 |
2017 | 8.2 | 2.672 | 1.096 |
2018 | 7.7 | 2.403 | 1.089 |
2019 | 7.4 | 2.283 | 1.089 |
2020 | 7.7 | 2.361 | 1.18 |
2021 | 7.1 |
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