由CTCF协调的3D增强器架构通过RNA聚合酶II在CD4+T细胞中的暂停释放来确定与免疫相关的基因表达模式
Eun-Chong Lee1, Kyungwoo Kim1,2, Sugyung Kim1,2
1Department of Tropical Medicine, Institute of Tropical Medicine, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea.
Nucleic acids research
|December 29, 2025
概括
CCCTC结合因子 (CTCF) 枯竭重组T细胞中的3D基因组架构. 然而,活性转录维持增强器循环,影响基因表达和JAK抑制剂反应,独立于CTCF.
科学领域:
- 基因组学就是基因组学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- CCCTC结合因子 (CTCF) 将哺乳动物基因组组织成结构域和循环.
- 在增强剂-促进剂相互作用中CTCF的确切作用,特别是在免疫细胞中,尚未完全理解.
研究的目的:
- 研究CTCF枯竭对3D增强器架构和激活CD4+T细胞中的基因表达的影响.
- 阐明CTCF影响增强剂-促进剂相互作用和对JAK抑制剂等刺激的反应转录调节的机制.
主要方法:
- 在激活的CD4+T细胞中CTCF的耗尽.
- 对3D基因组结构和增强剂-促进剂相互作用的分析.
- 评估活性转录,RNA聚合酶II (RNAPII) 暂停和基因表达模式.
- 对JAK抑制剂的转录反应的评估.
主要成果:
- 在CD4+T细胞中,CTCF枯竭显著重组了3D增强器架构.
- 在活动转录期间,STAT5结合的超级增强剂保持独立于CTCF的增强器循环.
- 增强剂-促进剂相互作用与RNAPII暂停释放有关,并且需要CTCF依赖的基因组组织来进行免疫基因表达.
- 通过改变STAT5增强剂网络,CTCF耗尽重新编程CD4+T细胞对JAK抑制剂的反应.
结论:
- 通过CTCF介导的3D基因组组织对于塑造CD4+T细胞中免疫相关基因表达至关重要.
- 活性转录和RNAPII暂停释放是维持增强器功能的关键机制,即使在CTCF损失时也是如此.
- 通过调节增强剂网络,CTCF在调节针对性疗法 (如JAK抑制剂) 的细胞反应方面发挥着重要作用.
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