SWI/SNF染色体重塑复合体BAF和PBAF在耗尽的CD8+ T细胞中差异调节表观遗传过渡
Amy E Baxter1, Hua Huang2, Josephine R Giles3
1Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
Immunity
|June 14, 2023
概括
两个SWI/SNF复合体,BAF和PBAF,可以控制CD8+T细胞耗尽 (Tex). PBAF保留了Tex原始细胞,而BAF产生了Tex效应细胞,影响了癌症免疫疗法.
科学领域:
- 免疫学 免疫学 免疫学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- CD8+ T 细胞耗尽 (Tex) 阻碍了有效的免疫反应对抗慢性病毒感染和癌症.
- 表观遗传调节器在耗尽的T细胞的发展和维持中发挥着至关重要的作用.
研究的目的:
- 为了研究染色体重塑复合体在CD8+T细胞耗尽中的作用.
- 识别特定的SWI/SNF复杂子单元,这些子单元调节Tex细胞的分化和功能.
主要方法:
- 在体内进行CRISPR查,以确定涉及Tex细胞发育的表观遗传因素.
- 在急性和慢性感染模型中分析CD8+ T细胞反应.
- 对Tex细胞增殖,存活和分化标记物的评估.
- 评估结合抗PD-L1免疫治疗的瘤控制.
主要成果:
- 正规的SWI/SNF复合体BAF对于最初的CD8+T细胞反应至关重要.
- 破坏PBAF SWI/SNF复合体促进了Tex细胞的增殖和生存.
- PBAF调节了从TCF-1+原始细胞到TCF-1-分化的Tex细胞的表观遗传和转录转移.
- 向PBAF可以增强瘤控制,无论是作为单一疗法还是与抗PD-L1疗法结合使用.
结论:
- 不同的SWI/SNF复合体,BAF和PBAF,在CD8+T细胞枯竭中具有相反的作用.
- PBAF维持了Tex原始细胞种群,而BAF是产生效应体样Tex细胞所需的.
- PBAF代表了改善癌症免疫治疗结果的潜在治疗标.
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