Pioneer factors as master regulators of the epigenome and cell fate

被引:143
作者
Balsalobre, Aurelio [1 ]
Drouin, Jacques [1 ]
机构
[1] Inst Rech Clin Montreal, Lab Genet Mol, Montreal, PQ, Canada
关键词
TRANSCRIPTION FACTORS; DIRECT CONVERSION; HUMAN FIBROBLASTS; RECEPTOR-BINDING; MITOTIC BOOKMARKING; CHROMATIN LANDSCAPE; MOUSE FIBROBLASTS; DNA METHYLATION; TARGET GENES; FOXA1;
D O I
10.1038/s41580-022-00464-z
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Pioneer factors are transcription factors with the unique ability to initiate opening of closed chromatin. The stability of cell identity relies on robust mechanisms that maintain the epigenome and chromatin accessibility to transcription factors. Pioneer factors counter these mechanisms to implement new cell fates through binding of DNA target sites in closed chromatin and introduction of active-chromatin histone modifications, primarily at enhancers. As master regulators of enhancer activation, pioneers are thus crucial for the implementation of correct cell fate decisions in development, and as such, they hold tremendous potential for therapy through cellular reprogramming. The power of pioneer factors to reshape the epigenome also presents an Achilles heel, as their misexpression has major pathological consequences, such as in cancer. In this Review, we discuss the emerging mechanisms of pioneer factor functions and their roles in cell fate specification, cellular reprogramming and cancer. Pioneer transcription factors activate gene enhancers through their unique ability to initiate opening of inaccessible chromatin. Pioneer factors are crucial for cell fate determination in development and for cellular reprogramming, and their misexpression has major pathological consequences in cancer.
引用
收藏
页码:449 / 464
页数:16
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