在人类淋巴细胞造血中,替代性多基解的单细胞景观
Jiaqi Qiang1,2,3,4, Shan Yu1,2,5, Jun Li6
1State Key Laboratory of Medical Molecular Biology, Department of Biochemistry and Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing 100005, China.
Journal of molecular cell biology
|July 9, 2024
概括
替代多基化 (APA) 在淋巴细胞发育过程中动态塑造mRNA. 这项研究绘制了从干细胞到成熟淋巴细胞的APA模式,揭示了关键的基因调节转移.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
背景情况:
- 替代多基化 (APA) 通过多基化位点 (PAS) 选择调节信使RNA (mRNA) 异型.
- 虽然已知APA会影响淋巴细胞激活,但其在整个分化谱中的作用尚不清楚.
研究的目的:
- 在淋巴细胞从造血干细胞和原生细胞 (HSPC) 到成熟的淋巴细胞的分化过程中绘制APA的动态景观.
- 识别具有差异性APA使用的基因,并了解其特定阶段的模式.
主要方法:
- 对来自五种淋巴细胞系的19973个细胞的单细胞3'-end转录组分析.
- 在12个细胞群中识别差异表达的PAS使用和内部分裂事件.
- 在T细胞从原始状态到记忆状态的分化过程中分析APA动态.
主要成果:
- 构建了一个全面的APA景观,揭示了2364个具有差异性PAS使用的基因和3021个具有差异性内基分裂的基因.
- 在分化过程中观察到3'-非翻译区域 (3'UTR) 缩短的全球趋势,并且还注意到了特定的延长情况.
- APA模式定义了三个不同的分化阶段:HSPCs,前体细胞和成熟细胞.
- 动态APA在调节转录因子,免疫功能和T细胞记忆转化过程中的蛋白质无处不在的关键基因中被确定.
结论:
- 在淋巴细胞分化过程中,APA起着重要的动态作用,影响基因表达和细胞身份.
- 已识别的APA模式为管理血液形成和免疫细胞发育的分子机制提供了洞察力.
- 这项研究为进一步研究APA在免疫系统中的调节功能奠定了基础.
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