Brg1/PRMT5核复合体在IPF介质细胞前代细胞中表观遗传调节FOXO1
Aiham H Jbeli1, Libang Yang1, Hong Xia1
1Department of Medicine, University of Minnesota, Minneapolis, Minnesota, United States.
概括
研究人员在异常性肺纤维化 (IPF) 肺中发现了纤维化介质原生细胞 (MPC). 一个Brg1/PRMT5复合体表观遗传调节FOXO1,促进IPF MPC的自我更新和驱动疾病的进展.
科学领域:
- 细胞生物学 细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 肺部医学 肺部医学
背景情况:
- 异形性肺纤维化 (IPF) 的特征是纤维化介质原生细胞 (MPC).
- 涉及Brg1和PRMT5等染色体重塑剂的表观遗传修饰与疾病病原发生有关.
- 这些表观遗传调节剂在IPF MPC自我更新中的作用尚不清楚.
研究的目的:
- 调查一种 Brg1/PRMT5 核复合体在IPF MPC 中表观遗传调节自我更新信号的假设.
- 确定驱动IPF MPC增殖的关键转录因子和表观遗传机制.
- 探索IPF的潜在治疗点.
主要方法:
- 从IPF和控制人类肺组织中分离和表征MPC.
- 用RNA测序,Q-PCR和西部斑点分析来评估基因表达.
- 免疫沉和染色体免疫沉试验用于识别蛋白质复合体和DNA结合.
- 功能性测试,以评估基因/蛋白质耗尽对MPC自我更新的影响.
主要成果:
- 与对照组相比,IPF MPC 显示转录因子 FOXO1 的表达增加.
- 在IPF MPC中发现了一个CD44/Brg1/PRMT5核复合体.
- Brg1和PRMT5调节FOXO1的表达和IPF MPC的自我更新;FOXO1控制着SOX2和OCT4.4的干性标记物.
- 在FOXO1促进体上,PRMT5甲基化H3R2,以表观遗传的方式增强其表达.
结论:
- Brg1/PRMT5复合体通过染色体重塑和基因组甲基化在IPFMPC中表观遗传上调FOXO1.
- 这种机制驱动IPF MPC的自我更新,有助于纤维化池和IPF的进展.
- 针对这种表观遗传相互作用是IPF的潜在治疗策略.
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