Non-canonical Targets of HIF1a Impair Oligodendrocyte Progenitor Cell Function.
Non-canonical Targets of HIF1a Impair Oligodendrocyte Progenitor Cell Function.
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HIF1a的非规范靶点损害少突胶质细胞祖细胞功能。
DOI:
10.1016/j.stem.2020.09.019
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发表时间:
2021-02-04
期刊:
影响因子:
23.9
通讯作者:
Tesar PJ
中科院分区:
文献类型:
--
作者:
Allan KC;Hu LR;Scavuzzo MA;Morton AR;Gevorgyan AS;Cohn EF;Clayton BLL;Bederman IR;Hung S;Bartels CF;Madhavan M;Tesar PJ
Mammalian cells respond to insufficient oxygen through transcriptional regulators called hypoxia-inducible factors (HIFs). While transiently protective, prolonged HIF activity drives distinct pathological responses in different tissues. Using a model of chronic HIF1a accumulation in pluripotent stem cell-derived oligodendrocyte progenitors (OPCs), we demonstrate that HIF1a activates non-canonical targets to impair generation of oligodendrocytes from OPCs. HIF1a activated a unique set of genes in OPCs through interaction with the OPC-specific transcription factor OLIG2. Non-canonical targets, including Ascl2 and Dlx3, were sufficient to block differentiation through suppression of the oligodendrocyte regulator Sox10. Chemical screening revealed that inhibition of MEK/ERK signaling overcame the HIF1a-mediated block in oligodendrocyte generation by restoring Sox10 expression without impacting canonical HIF1a activity. MEK/ERK inhibition also drove oligodendrocyte formation in hypoxic regions of human oligocortical spheroids. This work defines mechanisms by which HIF1a impairs oligodendrocyte formation and establishes that cell-type-specific HIF1a targets perturb cell function in response to low oxygen. Hypoxia impairs the generation of oligodendrocytes and myelin in various neurological disorders. Allan and colleagues map the genome-wide binding profile of HIF1a in oligodendrocyte progenitor cells (OPCs). HIF1a activated non-canonical, cell-type-specific target genes in OPCs that converge to suppress Sox10 expression and block oligodendrocyte formation.
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