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一个Dapl1⁺的原始CD8T细胞子群被丰富为记忆系前体

Adam C Lynch^1,2,3, Kaito A Hioki^2,3,4, Xueting Liang^1,2

¹Animal Biotechnology and Biomedical Sciences Program, University of Massachusetts, Amherst, MA, USA.

Science advances

|August 22, 2025

概括

研究人员发现了由Dapl1表达标记的特定CD8T细胞子集,这些细胞被预先编程为记忆差异化. 这一发现揭示了产生长期免疫力和潜在治疗点的新途径.

科学领域:

免疫学
细胞生物学
发育生物学

背景情况:

长期免疫依赖于记忆CD8T细胞,但它们的确切发育起源尚未完全理解.
纯粹的T细胞池表现出功能异质性,甚至在抗原暴露之前就影响了血统潜力.
识别幼稚群体中的前体对于理解记忆T细胞生成至关重要.

研究的目的:

识别和描述具有记忆分化倾向的原始CD8T细胞的特定亚群.
阐明控制这些记忆性T细胞生成的分子机制和发育途径.
探索这种新发现的T细胞子集的治疗含义.

主要方法:

流细胞测量和单细胞RNA测序以识别和表征Dapl1表达的原始CD8T细胞.
在体内感染模型和癌症模型评估Dapl1+ T细胞的分化潜力.
对Dapl1和Bcl11b在T细胞发育中的作用进行基因操纵 (例如,淘汰试验).

主要成果:

鉴定出一种表达死亡相关蛋白-1 (Dapl1) 的单独的CD8 T细胞亚群.
这些Dapl1+天真T细胞作为偏向于记忆分化的前体,独立于Dapl1本身,但依赖于Bcl11b.
不同化导致感染后的Dapl1+中央记忆类CD8T细胞和癌症中的干类记忆细胞.
Dapl1+原始T细胞起源于胸腺,在出生后出现在外围,具有有限的可塑性,表明胸腺印记.

结论:

已经发现了对记忆命运的原始 CD8 T 细胞的发育印记.
这一发现揭示了与传统模型不同的T细胞生成的替代途径.
这些发现为旨在增强或操纵免疫记忆的治疗应用提供了新的途径.

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