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重编程表观遗传特征可以改善复发性流产患者的B调节细胞功能
Fei Ma1,2,3,4, Qing Xu1,2,3,4, Lingzhi Xu5
1Department of Chinese Traditional Medicine, Affiliated Shenzhen Maternity & Child Healthcare Hospital, Southern Medical University, Shenzhen, China.
Cell communication and signaling : CCS
|January 24, 2026
概括
在重复性妊娠损失 (RPL) 中,调控性B细胞 (Bregs) 功能障碍与受损的TRIM28-DNMT1降解有关. 苏贝罗伊兰尼利德胺酸 (SAHA) 通过向这个轴恢复免疫耐受性,为RPL提供了潜在的治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 生殖医学 生殖医学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 复发性流产 (RPL) 影响了近一半的患者,原因是母亲的免疫耐受性受损.
- 在RPL中,产生IL-10的调节性B细胞 (Bregs) 的功能受损,但机制尚不清楚.
- 这项研究研究了RPL中的布雷格功能障碍的机制,并评估了作为治疗剂的氨酸 (SAHA).
研究的目的:
- 确定在重复流产 (RPL) 中调控性B细胞 (Breg) 功能障碍背后的机制.
- 研究DNA甲基转移酶1 (DNMT1) 的作用及其在RPL Bregs中的调节.
- 测试suberoylanilide酸 (SAHA) 作为一种潜在的疗法,以恢复RPL的免疫耐受性.
主要方法:
- 从RPL患者和健康对照 (HCs) 中分离的外围Bregs.
- 进行了表观遗传分析 (DNMT1占用,IL10促进体甲基化) 和无处不在分析.
- 进行了功能性T细胞 (Teffs) 共同培养,并测试了SAHA治疗.
主要成果:
- 与HC相比,RPL Bregs表现出 IL10 促进物甲基化和 DNMT1 过度表达的升高,与 IL-10 分泌量减少和 Teff 抑制受损相关.
- 在RPL Bregs中DNMT1的积累是由于与E3泛胺酶TRIM28的结合减少,导致K48结合的多聚基化减少.
- 萨哈治疗恢复了TRIM28的表达,增强了DNMT1的无化和降解,逆转了IL10的高甲基化,并挽救了IL-10的分泌和Teff抑制.
结论:
- 通过破坏DNMT1降解,TRIM28缺乏导致DNMT1介导的IL10沉默和RPL中的Breg功能障碍.
- 萨哈有效地准TRIM28-DNMT1-IL10轴,以恢复RPL中的免疫耐受性.
- 萨哈代表了一种有前途的精确疗法,用于免疫媒介的复发性妊娠损失.
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