Deletion of Arid1a in reproductive tract mesenchymal cells reduces fertility in female mice

Xiyin Wang, Shikha Khatri, Russell Broaddus, Zhong Wang, Shannon M. Hawkins

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Women with endometriosis can suffer from decreased fecundity or complete infertility via abnormal oocyte function or impaired placental-uterine interactions required for normal pregnancy establishment and maintenance. Although AT-rich interactive domain 1A (SWI-like) (ARID1A) is a putative tumor suppressor in human endometrial cancers and endometriosis-associated ovarian cancers, little is known about its role in normal uterine function. To study the potential function of ARID1A in the female reproductive tract, we generated mice with a conditional knockout of Arid1a using anti-Müllerian hormone receptor 2-Cre. Female Arid1a conditional knockout mice exhibited a progressive decrease in number of pups per litter, with a precipitous decline after the second litter. We observed no tumors in virgin mice, although one knockout mouse developed a uterine tumor after pregnancy. Unstimulated virgin female knockout mice showed normal oviductal, ovarian, and uterine histology. Uteri of Arid1a knockout mice showed a normal decidualization response and appropriate responses to estradiol and progesterone stimulation. In vitro studies using primary cultures of human endometrial stromal fibroblasts revealed that small interfering RNA knockdown of ARID1A did not affect decidualization in vitro. Timed pregnancy studies revealed the significant resorption of embryos at Embryonic Day 16.5 in knockout mice in the third pregnancy. In addition to evidence of implantation site hemorrhage, pregnant Arid1a knockout mice showed abnormal placental morphology. These results suggest that Arid1a supports successful pregnancy through its role in placental function.

Original languageEnglish (US)
Article number93
JournalBiology of reproduction
Volume94
Issue number4
DOIs
StatePublished - Apr 1 2016

Keywords

  • ARID1A
  • Female reproductive tract
  • Fertility
  • Genetically engineered mouse models
  • Placenta
  • Tumor suppressor
  • Uterus

ASJC Scopus subject areas

  • Reproductive Medicine
  • Cell Biology

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