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Interleukin-25 induced by human chorionic gonadotropin promotes the proliferation of decidual stromal cells by activation of JNK and AKT signal pathways.

Fertility and sterility (2014-04-22)
Ying Wang, Yuan Zhang, Ming-Qing Li, Deng-Xuan Fan, Xiao-Hui Wang, Da-Jin Li, Li-Ping Jin
ABSTRACT

To clarify the role and mechanism of interleukin (IL)-25 in regulating the biological functions of decidual stromal cells (DSCs) in human early pregnancy. Laboratory study of the effect of IL-25 induced by hCG on the proliferation of DSCs. Research laboratories. Women aged 23-47 years with normal pregnancy and abortion. None. Signal transduction from IL-25. Here we show that DSCs coexpress IL-25/IL-17RB. Human chorionic gonadotropin promotes the expression of IL-25/IL-17RB. In contrast to anti-human IL-25 neutralizing antibody, recombinant human IL-25 (rhIL-25) significantly stimulates the proliferation of DSCs in dosage- and time-dependent manners. RhIL-25 promotes the phosphorylation of AKT, extracellular-signal-regulated kinases 1/2 (ERK1/2), c-Jun N-terminal kinases (JNK), and nuclear factor κB in DSCs. Interestingly, blocking JNK or AKT signal with inhibitors down-regulates the stimulatory effect on DSC proliferation induced by rhIL-25. In addition, the results of Western blot show that the expression of IL-25/IL-17RB in DSCs from normal pregnancy was higher than that from abortion. Our results have revealed that hCG derived of trophoblasts up-regulates the expression of IL-25/IL-17RB in DSCs and that IL-25 further stimulates the proliferation of DSCs through activating JNK and AKT signals, which finally contributes to the establishment and maintenance of physiological pregnancy.

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