A positive COX-2/IL-1β loop promotes decidualization by up-regulating CD82

in Reproduction
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  • 1 Q Qu, Affiliated Maternity and Child Health Care Hospital, Nantong University, Nantong, China
  • 2 H Shen, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
  • 3 C Wang, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
  • 4 X Zhang, Hospital of Obstetrics and Gynecology, Fudan University, Shanghai, China
  • 5 J Wu, Institute of Obstetrics and Gynecology, Fudan Univerisity Shanghai Medical College, Shanghai, China
  • 6 H Lu, Changzhou No. 2 People’s Hospital, Nanjing Medical University, Nanjing, China
  • 7 X Qiu, Institute of Obstetrics and Gynecology, Fudan Univerisity Shanghai Medical College, Shanghai, China
  • 8 J Ding, Affiliated Maternity and Child Health Care Hospital, Nantong University, Nantong, China
  • 9 X Tan, Affiliated Maternity and Child Health Care Hospital, Nantong University, Nantong, China
  • 10 L Liu, Department of Gynecology, Changzhou NO.2 People’s Hospital, affiliated with Nanjing Medical University, Changzhou, China
  • 11 M Li, Shanghai Medical College, Institute of Obstetrics and Gynecology, Fudan University, Shanghai, China

Correspondence: Ming-Qing Li, Email: mqli@fudan.edu.cn
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A successful pregnancy requires sufficient decidualization of endometrial stromal cells (ESCs). CD82, a metastasis suppressor, is a critical regulator for trophoblast invasion but the effect in decidualization was largely unknown. Here we reported that there was a high level of CD82 in DSC by the immunohistochemistry staining and flow cytometer analysis. Stimulation with prostaglandin E2 (PGE2) elevated the expression of CD82 in ESCs. In contrast, celecoxib, a selective COX-2 inhibitor, significantly down-regulated the expression of CD82 in decidual stromal cells (DSCs). Bioinformatics analysis and further research showed that recombinant human interleukin (IL)-1β protein (rhIL-1β) up-regulated CD82 in ESCs. Of note, blocking IL-1β signaling with anti-human IL-1β neutralizing antibody could reverse the stimulatory effect of PGE2 on CD82 in ESCs. Silencing CD82 resulted in the decease of the decidualization markers PRL and IGFBP1 mRNA levels in DSCs. More importantly, we observed rhIL-1β also up-regulated the expression of COX-2, and the up-regulation of PRL and IGFBP1 induced by rhIL-1β could be abolished by celecoxib in ESCs or CD82 deficiency in DSCs. This study suggests that CD82 should be a novel promotor for decidualization under a positive regulation of the COX-2/PGE2/IL-1β positive feedback loop.

 

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