401-生发中心B细胞的重编程可塑性机制 episode artwork

EPISODE · Jan 16, 2026 · 20 MIN

401-生发中心B细胞的重编程可塑性机制

from 聊聊Sci

这项研究揭示了生发中心(GC)B细胞在免疫反应过程中,通过与滤泡辅助性T细胞(TFH)的相互作用,会暂时进入一种极具表型可塑性和类似于干细胞的状态。研究人员发现,这种由TFH细胞激发的信号不仅增强了B细胞的表型转换能力,还使其对重编程为诱导多能干细胞(iPSC)展现出极高的效率。从机制上看,组蛋白H1水平的降低和染色质结构的重塑,共同为这种可塑性的开启提供了遗传学基础。然而,这种生理性的细胞可塑性若被淋巴瘤相关突变(如BTG1或H1缺失)恶意利用,则会导致恶性转化。数据分析表明,这种“干性”特征的表达与弥漫大B细胞淋巴瘤(DLBCL)患者的预后不良及生存率下降密切相关。总之,该发现为理解免疫适应性与淋巴瘤发生之间的联系提供了全新的视角。References: Scourzic L, Izzo F, Teater M, et al. T follicular helper cells transiently unlock a plasticity state in germinal centre B cells during the humoral immune response[J]. Nature Cell Biology, 2025: 1-14.前往小宇宙评论区与主播互动

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401-生发中心B细胞的重编程可塑性机制

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