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一个人类诱导的多能干细胞工具箱用于研究性染色体效应

Ruta Meleckyte¹, Wazeer Varsally¹, Jasmin Zohren²

¹Sex Chromosome Biology Laboratory, The Francis Crick Institute, 1 Midland Road, London, UK.

Stem cell reports

|October 17, 2025

概括

性染色体影响发育和疾病. 这项研究产生了同源的人类诱导多能干细胞 (hiPSCs),揭示了X染色体损失会放松基因表达的调节,通过Y染色体基因影响自体.

科学领域:

遗传学是一个遗传学.
发育生物学发展生物学
干细胞生物学干细胞生物学

背景情况:

性染色体 (XY和XX) 显著影响人类发育和疾病.
人类诱导多能干细胞 (hiPSCs) 是研究性别差异的有价值模型,但自体变异和X染色体剂量补偿不稳定性可能会混结果.
现有的模型缺乏对自体遗传背景和X染色体剂量补偿的精确控制.

研究的目的:

创建具有稳定的X染色体剂量补偿的自体异位性hiPSC线,以准确研究性染色体影响.
为了研究多能干细胞内基因表达的性别差异.
探索X染色体单体 (XO) 和XY剂量对细胞功能的影响.

主要方法:

从XXY纤维细胞生成XXX和XYhiPSC,确保自身体的身份.
创建了X-单体 (XO) 的hiPSC来研究X-Y剂量效应.
分析了异构性hiPSC线的转录形状,以确定X染色体形状的性别特异性差异和影响.

主要成果:

XX和XYhiPSC之间的转录差异是最小的.
在XO细胞中X染色体平分不充分导致显著的转录放松调节,主要影响自体基因.
鉴定出Y染色体基因具有脱离X无活化的同类基因是这种放松调节的调解者.

结论:

自体认同和稳定的X染色体剂量补偿对于研究hiPSCs的性染色体影响至关重要.
X染色体的剂量,而不仅仅是性染色体的补充,深深地影响了转录组.
Y染色体基因在调解X染色体剂量对自体基因表达的影响方面发挥着至关重要的作用.

关键词:

疾病建模疾病建模这就是hiPSCs.人类人类人类人类人类人类人类在 iPSC 模型中.这些是iPSCs.诱导多能干细胞的诱导干细胞.性别差异的性别差异.性二态性质性二态性质性二态性.

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