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Rictor/mTORC2 is involved in endometrial receptivity by regulating epithelial remodeling
Author(s) -
Zhang Yue,
Du Xinman,
Chen Xuemei,
Tang Hongyu,
Zhou Qin,
He Junlin,
Ding Yubin,
Wang Yingxiong,
Liu Xueqing,
Geng Yanqing
Publication year - 2021
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fj.202100529rr
Subject(s) - mtorc2 , microbiology and biotechnology , cancer research , biology , signal transduction , pi3k/akt/mtor pathway , mtorc1
Successful embryo implantation requires well‐functioning endometrial luminal epithelial cells to establish uterine receptivity. Inadequate uterine receptivity is responsible for approximately two thirds of implantation failures in humans. However, the regulatory mechanism governing this functional process remains largely unexplored. A previous study revealed that the expression of Rictor, the main member of mTORC2, in mouse epithelial cells is increased on the fourth day of gestation (D4). Here, we provide the first report of the involvement of Rictor in the regulation of endometrial receptivity. Rictor was conditionally ablated in the mouse endometrium using a progesterone receptor cre (PR cre ) mouse model. Loss of Rictor altered polarity remodeling and the Na + channel protein of endometrial cells by mediating Rac‐1/PAK1(pPAK1)/ERM(pERM) and Sgk1/pSgk1 signaling, respectively, ultimately resulting in impaired fertility. In the endometrium of women with infertility, the expression of Rictor was changed, along with the morphological transformation and Na + channel protein of epithelial cells. Our findings demonstrate that Rictor is crucial for the establishment of uterine receptivity in both mice and humans. The present study may help improve the molecular regulatory network of endometrial receptivity and provide new diagnostic and treatment strategies for infertility.