期刊
HUMAN REPRODUCTION
卷 27, 期 7, 页码 2107-2116出版社
OXFORD UNIV PRESS
DOI: 10.1093/humrep/des132
关键词
CXCL8; ESCs; proliferation; apoptosis; endometriosis
资金
- Major International Joint Research Project of National Natural Science Foundation of China (NSFC) [30910103909]
- National and Shanghai Leading Academic Discipline Project [211XK22]
- Program for Outstanding Medical Academic Leader of Shanghai
- NSFC [31101064]
- Ministry of Education Research Fund for Doctoral Program [20110071120092]
- Research Program of Shanghai Health Bureau [2011Y081, 2010Y015]
- Youth Scientific Research Foundation of Shanghai Medical College
- Talented Person Development Foundation of Shanghai [2009008]
Chemokine CXCL8 (also known as IL-8) has been identified as a potential regulator of endometrial stromal cells (ESCs), but it is unclear how CXCL8 regulates the survival of ESCs in the pathogenesis of endometriosis. We assessed the secretion of CXCL8 by enzyme-linked immunosorbent assays and the expression of its receptors, CXCR1 and CXCR2, by in-cell Western assay and immunhistochemistry. The effects of CXCL8 on the activation or expression of various cell mediators were also investigated by in-cell Western assay. The effects of CXCL8 on the proliferation, growth and apoptosis of ESCs in vitro were assessed by BrdU assays, cell counts and annexin V labeling, respectively. Secretion of CXCL8 and expression of CXCR1 in the eutopic ESCs from women with endometriosis were significantly higher than that in control ESCs, but the expression of CXCR2 showed no significant difference between these two cell types. CXCL8 stimulated proliferation and growth and reduced apoptosis of ESCs in an autocrine manner, and these effects were abolished by anti-human CXCL8 and CXCR1 neutralizing antibodies and by a PI3K/Akt inhibitor. Moreover, CXCL8 up-regulated the expression of the anti-apoptotic proteins, survivin and Bcl-2, inhibited the expression of the Phosphatase and tensin homolog (PTEN) and activated the phosphorylation of Akt. This study suggests that CXCL8 and CXCR1 are involved in the pathogenesis of endometriosis by up-regulating proliferation and growth and restricting apoptosis in ESCs by activating the PTEN/Akt pathway and mediating the expression of survivin and Bcl-2.
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