Reproductive Medicine Center, Zhongnan Hospital of Wuhan University, Wuhan, China.
Hubei Clinical Research Center for Prenatal Diagnosis and Birth Health, Wuhan, China.
J Cell Mol Med. 2021 Jan;25(1):297-308. doi: 10.1111/jcmm.16030. Epub 2020 Nov 17.
Studies have reported that non-receptive endometrium or abnormal decidualization was closely related to recurrent implantation failure (RIF). MLL1 is a histone H3 lysine 4 trimethylation (H3K4me3) transferase that regulates the transcriptional activation of target genes. The role of MLL1 has been underexplored during decidualization. In our research, we found the expression of MLL1 was closely related to endometrial receptivity, and it was responsible to hormone stimulation. Inhibiting the function of MLL1 by MM102 reduced the transformation of HESCs. Furthermore, down-regulation of MLL1 by siRNA transfection significantly decreased PGR and its target genes expression. MLL1 act as a co-activator of ERα, and both of them were recruited to PGR regulatory regions, thus promote PGR transcription. Our study showed that MLL1 plays a key role in promoting progesterone signalling transmission.
研究表明,接受性不佳的子宫内膜或异常的蜕膜化与反复着床失败(RIF)密切相关。MLL1 是一种组蛋白 H3 赖氨酸 4 三甲基化(H3K4me3)转移酶,可调节靶基因的转录激活。在蜕膜化过程中,MLL1 的作用尚未得到充分探索。在我们的研究中,我们发现 MLL1 的表达与子宫内膜的接受性密切相关,并且对激素刺激有反应。通过 MM102 抑制 MLL1 的功能会减少 HESCs 的转化。此外,通过 siRNA 转染下调 MLL1 显著降低了 PGR 及其靶基因的表达。MLL1 作为 ERα 的共激活因子发挥作用,两者都被招募到 PGR 调节区域,从而促进 PGR 转录。我们的研究表明,MLL1 在促进孕激素信号转导中发挥关键作用。