双对应染色体适应了幸存者和BRG1/SWI复合体,以激活CD4+细胞中的DNA损伤反应
Venkataragavan Chandrasekaran1, Karin M E Andersson1, Malin Erlandsson1,2
1Department of Rheumatology and Inflammation Research, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Box 480, Gothenburg, 40530, Sweden.
Cell communication and signaling : CCS
|September 11, 2024
概括
双对应色素区域 (BvCR) 控制CD4+细胞中的DNA损伤反应. 幸存者蛋白质将染色体重塑复合体在BvCR上,抑制DNA修复,为类风湿性关节炎等自身免疫性疾病提供治疗点.
科学领域:
- 表观遗传学和染色体生物学
- 免疫学和自身免疫力
- 分子生物学和DNA修复
背景情况:
- 双对应的染色体区域 (BvCR) 是表观遗传标记 (H3K4me3/H3K27me3),对于细胞分化过程中的基因调节至关重要.
- 在DNA损伤反应中BvCR的作用,特别是在类风湿性关节炎 (RA) 中的自身免疫CD4+T细胞中,以前是未知的.
- coprotein survivin涉及染色体结合和调解 CD4+ 细胞中的干扰素- (IFNγ) 作用.
研究的目的:
- 在类风湿性关节炎 (RA) 的背景下,研究BvCR在自身免疫CD4+细胞的DNA损伤反应中的功能.
- 探索生存素与BvCR的相互作用及其对DNA损伤修复机制的影响.
- 评估针对幸存者和相关复合物的潜力,以治疗自身免疫性疾病的治疗干预.
主要方法:
- 深度测序确定了在人类CD4+细胞中以H3K4me3,H3K27me3,H3K27ac为特征的BvCR.
- 计算方法 (图形丰富,机器学习,结构建模) 预测和质谱验证了幸存者的染色体结合蛋白伙伴.
- 通过抑制幸存者或JAK-STAT信号来评估Survivin的作用,随后在RA患者样本中进行转录组分析和免疫调节药物的评估.
主要成果:
- H3K4me3-主导BvCR (H3K4me3-BvCR) 适应了参与DNA损伤反应的生存,调节基因.
- 抑制幸存者或JAK-STAT信号增强H3K4me3-BvCR,改善DNA损伤识别和CD4+细胞中的细胞循环停止.
- 幸存者促进了BRG1/SWI染色体重塑复合物的BvCR的定,这对于DNA损伤反应协调至关重要;在RA中观察到它的放松调节和CD4+细胞定位,免疫调节药物影响了BRG1/SWI复合物的定.
结论:
- 在IFN激活的CD4+细胞中,BvCR在控制DNA损伤和维持基因组稳定性方面发挥着关键作用.
- 幸存者通过将BRG1/SWI复合体在BvCR上,从而抑制DNA损伤反应途径,充当一个关键的调解者.
- 这些发现强调了生存和BRG1/SWI复合体作为管理RA等自身免疫疾病的潜在治疗点.
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