HOXA10 co-factor MEIS1 is required for the decidualization in human endometrial stromal cell

Yawen Xu, Jinhua Lu, Jinxiang Wu, Ruiwei Jiang, Chuanhui Guo, Yedong Tang, Haibin Wang, Shuangbo Kong, Suqing Wang
In: Journal of Molecular Endocrinology · 2020 · vol. 64(4) , pp. 249–258 · doi:10.1530/jme-19-0100 · PMID:32197234 · W3011229833
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MEIS1 is required for human endometrial decidualization, interacting with HOXA10 to regulate KAT2B and ETA expression, which partially rescues decidualization defects upon MEIS1 deficiency.

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Abstract

Decidualization is a critical process for embryo implantation and pregnancy maintenance in humans. The homeobox gene HOXA10 has been widely studied in endometrial receptivity establishment and decidualization. MEIS1, a three-amino-acid loop extension (TALE) family homeobox gene, has been proven to be a co-factor for HOXA10 in mouse uterus. However, the interaction between MEIS1 and HOXA10 in the human decidual cells remains to be elucidated. siRNA and CRISPR-Cas9 were employed to knockdown and knockout MEIS1 in the cultured human endometrial stromal cells, and it was found that MEIS1 deficiency leads to impaired decidualization. The physical interaction between the MEIS1 and HOXA10 in human endometrial stromal cell was confirmed by immunoprecipitation. Moreover, KAT2B and ETA were proved to be downregulated in the absence of MEIS1, and luciferase reporter and ChIP assays demonstrated that MEIS1-HOXA10 complex binds to the promoters of KAT2B and ETA and regulates their activity. Overexpression of KAT2B and ETA can partially rescue the decidualization defects in MEIS1-knockout HESCs. Taken together, these data suggest that MEIS1 plays an indispensable role in decidualization in human endometrial stromal cells, and MEIS1 interacts with HOXA10 to regulate the downstream genes, such as KAT2B and ETA. These findings will contribute to our understanding about the regulatory network in the process of decidualization in humans.

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