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诱导多能干细胞携带ASXL1突变的生成和表征

Wenjun Wang^1,2, Xiaoru Zhang¹, Yunan Li¹

¹State Key Laboratory of Experimental Hematology, Institute of Hematology &Blood Diseases Hospital, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300020, China.

Stem cell reviews and reports

|June 17, 2024

概括

患者衍生诱导多能干细胞 (iPSCs) 具有额外的性状1 (ASXL1) 突变,显示红细胞发育受损,并促进髓质细胞的产生. 这种ASXL1 iPSC模型有助于研究髓状瘤和开发向疗法.

科学领域:

血液学血液学血液学
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
干细胞生物学干细胞生物学

背景情况:

额外的性别像1 (ASXL1) 突变在髓状瘤中很常见,并且与预后不佳有关.
现有的小鼠模型未能完全复制ASXL1突变骨髓性疾病的发病因子.
患者衍生诱导多能干细胞 (iPSCs) 为疾病建模提供了一个有前途的平台.

研究的目的:

从携带ASXL1突变的骨髓增殖性瘤患者中生成和描述iPSCs.
通过使用iPSC来研究ASXL1突变对造血细胞分化的功能后果.
探索 ASXL1 突变骨髓性恶性瘤背后的分子机制.

主要方法:

来自患者的iPSCs的生成和表征.
针对iPSCs分化为造血干细胞和原生细胞.
基因表达分析 (GO和KEGG丰富).
西部斑点对H2AK119ub的水平.
染色体免疫沉测序 (ChIP-Seq) 对于H2AK119ub的占用.

主要成果:

具有ASXL1突变的iPSCs表现出正常的多能性和差异化潜力,但产生了骨髓偏差的造血输出.
在ASXL1突变细胞中,红状腺分化受损.
基因表达分析揭示了胚胎发育,骨髓,免疫和神经通路的丰富.
突变ASXL1导致全球H2AK119ub水平降低,干细胞维护基因占用率降低.
在ASXL1突变细胞中观察到干细胞维护基因的升级.

结论:

生成的ASXL1突变的iPSC模型准确地反映了骨髓性恶性瘤的关键方面.
通过表观遗传失调,ASXL1突变有助于骨髓偏差和受损的红色素形成.
这种iPSC模型是研究ASXL1突变骨髓状细胞疾病和查向治疗的宝贵工具.

关键词:

美国证券交易所ASXL1 诱导的多能干细胞干细胞骨髓增殖性疾病骨髓增殖性疾病

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