3D染色体重编程原始人记忆TH2细胞用于快速回忆和致病性功能障碍.
Anne Onrust-van Schoonhoven1,2, Marjolein J W de Bruijn1, Bernard Stikker1
1Department of Pulmonary Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands.
Science immunology
|July 7, 2023
概括
记忆T助手2 (TH2) 细胞使用重编程的染色质结构来快速回忆反应. 在喘中,对这些记忆回路的异常控制与慢性炎症有关.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 记忆T细胞对于长期的免疫力至关重要,但它们快速回忆炎症反应的机制尚未完全理解.
- CD4+ T助手2 (TH2) 细胞是过敏反应和免疫记忆中的关键参与者.
研究的目的:
- 研究染色体组织和表观遗传重编程,促进人类CD4+记忆TH2细胞的快速回忆反应.
- 探索这些机制在慢性炎症疾病 (如喘) 的背景下发挥的作用.
主要方法:
- 在天真和记忆TH2细胞中,在一维 (1D) 和三维 (3D) 层面上分析染色质景观.
- 在远端增强剂中识别转录允许性染色质,并将其组织成3D染色质枢纽.
- 在"记忆TAD"中对拓关联域 (TAD) 和促进器-增强器相互作用的表征.
主要成果:
- 记忆TH2细胞表现出独特的染色质景观,在1D和3D层面进行重编程,与天真T细胞不同.
- 召回基因的表观遗传原始化通过远程3D枢纽内的远程增强器的转录允许色素发生.
- 在"记忆TAD"中预先形成的促进剂-增强剂相互作用被AP-1转录因子用于快速的基因诱导.
- 来自喘患者的休息记忆TH2细胞显示这些回忆回路的过早激活.
结论:
- 稳定,多层次的染色体组织重编程是T细胞免疫记忆的基本机制.
- 由错误的染色体组织驱动的原始召回反应的异常转录控制,有助于喘等疾病的慢性炎症.
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