ARID1A regulates epithelial proliferation via modulating KLF15 expression with PGR (A) ChIP assay performed with uterine chromatin isolated Arid1af/f and Arid1ad/d mice at 3.5 dpc using IgG, PGR, and ARID1A antibodies followed by qPCR.

This paper studied how the chromatin remodeler ARID1A influences endometrial function in early pregnancy, focusing on epithelial proliferation and regulation of KLF15 expression through PGR. Using uterine chromatin from Arid1a conditional knockout mice at 3.5 dpc, the authors performed ChIP-qPCR and related assays to examine PGR and ARID1A occupancy, ARID1A–PGR interactions (immunoprecipitation and transient transfection in Ishikawa cells), and KLF4/KLF15 protein expression by immunohistochemistry, with additional measurements in human endometrium. Key findings reported that ARID1A regulates epithelial proliferation by modulating KLF15 expression in association with PGR and that KLF4/KLF15 expression patterns differed in human endometrium with endometriosis. The paper does not explicitly state limitations in the provided excerpt. This paper is centrally about endometriosis — it includes human endometrial immunohistochemistry comparisons of KLF4 and KLF15 in the presence versus absence of endometriosis and examines ARID1A-dependent regulation in early pregnancy.

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