Blood:赖氨酸特异性去甲基化酶1A (LSD1)限制人HSC的体外扩增,是UM171的靶点

2020-07-01 MedSci原创 MedSci原创

在体外,抑制赖氨酸特异性脱甲基酶1A(LSD1)可促进人HSCs增殖。包含CoREST复合物的LSD1是HSC扩增激动剂UM171的主要靶点。

目前,造血干细胞移植仍是多种恶性血液病的唯一治愈方法,但一直都受到细胞供体不足、优质细胞无法充分增殖等问题的限制。因此,长期以来,研究人员都在致力于探究可大量扩增造血干细胞以用于临床实践的培养条件。

近期,《血液》杂志上发表了一篇文章,Subramaniam等人发现,抑制表观遗传调控因子赖氨酸特异性组蛋白脱甲基酶1A(LSD1)可诱导人脐带血来源的CD34 +细胞快速扩增,并可通过防止分化促进HSC在体外长期繁殖。

用LSD1抑制剂处理的细胞的表型和分子特性与用UM171处理的细胞的高度相似,UM171是一种通过未知机制促进HSC扩增的试剂,目前已在临床试验中进行测试。研究人员发现LSD1以及包含染色质重塑复合物CoREST的的其他LSD1成员在UM171处理后迅速多泛素化降解。

通过CRISPR/Cas9敲除CoREST的核心成员RCOR1,可导致CD34+细胞扩增,效果类似于LSD1抑制和UM171处理。

总而言之,LSD1和CoREST可限制HSC的扩增,是UM171的主要靶点,为UM171的 HSC促进活性提供了理论基础。

原始出处:

Agatheeswaran Subramaniam,et al. Lysine-specific demethylase 1A (LSD1) restricts ex vivo propagation of human HSCs and is a target of UM171. Blood. June 24,2020.

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    2020-10-25 sjq035
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    2020-08-10 neizongke
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