上海交通大学发现分娩启动机制,有望提供新的药物靶标防治早产

2021-07-06 JACKZHAO MedSci原创

这项分娩启动机制最新研究成果将为早产防治提供了新策略,有望为阻断分娩启动提供新的药物靶标,从而为早产防治提供新的干预手段。

7月5日,上海交通大学医学院附属仁济医院生殖医学中心、上海市辅助生殖与优生重点实验室孙刚教授团队在《临床与转化医学》(《Clinical and Translational Medicine》)(IF:11.492)杂志在线发表最新研究成果。发现转录增强子结合蛋白(CEBPδ)在人的分娩启动中具有关键作用,这项分娩启动机制最新研究成果将为早产防治提供了新策略,有望为阻断分娩启动提供新的药物靶标,从而为早产防治提供新的干预手段。

我国早产发生率为7%左右,每年约有100多万早产儿出生。早产是五岁以下儿童死亡和致残的首要原因,许多早产儿即使存活,也将面临终身残疾的威胁。因此,如何调控分娩启动时间,减少早产发生率十分重要。既往研究发现,分娩由多种因素控制,涉及胎膜激活、子宫收缩、宫颈软化等多个过程,而糖皮质激素再生和前列腺素合成是胎膜激活的关键环节,但至今尚不清楚是否存在同时驱动上述两个关键环节的重要转录因子,因此临床上一直缺乏防治早产的有效手段。

在该研究中,孙刚教授团队首先通过人临床组织样本转录组高通量测序发现转录增强子结合蛋白(CEBPδ)可能在胎膜激活和分娩启动中起着关键作用,然后通过染色质免疫共沉淀高通量测序和人原代胎膜细胞进行了机制研究,发现CEBPδ能同时驱动胎膜糖皮质激素再生的关键酶11β-羟基类固醇脱氢酶(11β-HSD1)和前列腺素合成限速酶环氧合酶(COX-2)的表达,从而启动分娩。同时,研究人员也用CEBPδ敲除鼠模型证明,CEBPδ敲除可以显著延长小鼠的分娩时间。

该成果首次发现能够驱动胎膜激活相关重要事件的共同转录因子CEBPδ,因此抑制该转录因子通路的激活有望为阻断分娩启动提供新的药物靶标,从而为早产防治提供新的干预手段。未来,该研究成果将有望应用于临床,为减少早产发生率、保障母婴安全和健康做出积极贡献。

研究团队介绍称,如何调控分娩启动时间,减少早产发生率十分重要。既往研究发现,分娩由多种因素控制,涉及胎膜激活、子宫收缩、宫颈软化等多个过程,而糖皮质激素再生和前列腺素合成是胎膜激活的关键环节,但至今尚不清楚是否存在同时驱动上述两个关键环节的重要转录因子。由此,临床上一直缺乏防治早产的有效手段。

总之,在这项研究中证明了C/EBPδ 是羊膜成纤维细胞中的关键转录因子,驱动至少两个相互关联的关键内分泌事件在分娩过程中,即皮质醇再生和PG合成。 此外,可以诱导 C/EBPδ 的表达通过充分描述的主要促生育因素包括糖皮质激素和PGs。 因此,C/EBPδ可能是分娩时膜激活的关键,并且靶向 C/EBPδ 通路可能被推测为对早产的治疗具有潜在价值。 在除了 HSD11B1 和 PTGS2,还有丰富的其他基因也被揭示为 C/EBPδ 的潜在靶基因通过 ChIP-seq 在羊膜成纤维细胞中检测到这些潜在的靶基因是否也是参与分娩会很有趣。

参考资料:Lu JW, Wang WS, Zhou Q, et al. C/EBPδ drives key endocrine signals in the human amnion at parturition. Clin Transl Med. 2021;11(6):e416. doi:10.1002/ctm2.416

 

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    2021-11-08 小雨闲

    学习

    0

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    2021-07-09 顿大侠

    希望能尽早解决早产问题

    0

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    2021-07-08 linlin2312
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    2021-07-08 zhaojie88
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    2021-07-08 yuandd
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    2021-07-06 肿肿

    机制研究离临床仍然有距离,不过与临床结合思考,仍然有帮助的,不能仅仅是纯临床思维,转化思维同样重要

    0

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    2021-07-06 Lizhihua6

    学习了

    0

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