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Human Adult Glial Progenitors Express Distinct miRNA Profiles Compared to their Fetal Counterparts

ABSTRACT: Human glial progenitor cells (hGPCs) exhibit diminished expansion competence with age, as well as after recurrent demyelination. Using RNA-sequencing to compare the gene expression of fetal and adult hGPCs, we identify age-related changes in transcription consistent with the repression of genes enabling mitotic expansion, concurrent with the onset of aging-associated transcriptional programs. Adult hGPCs develop a repressive transcription factor network centered on MYC, and regulated by ZNF274, MAX, IKZF3, and E2F6. Individual over-expression of these factors in iPSC-derived hGPCs lead to a loss of proliferative gene expression and an induction of mitotic senescence, replicating the transcriptional changes incurred during glial aging. miRNA profiling identifies the appearance of an adult-selective miRNA signature, imposing further constraints on the expansion competence of aged GPCs. hGPC aging is thus associated with acquisition of a MYC-repressive environment, suggesting that suppression of these repressors of glial expansion may permit the rejuvenation of aged hGPCs.

ORGANISM(S): synthetic construct Homo sapiens

PROVIDER: GSE255589 | GEO | 2024/02/12

REPOSITORIES: GEO

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Human Adult Glial Progenitors Are Transcriptionally Distinct from Their Fetal Counterparts [bulk RNA-seq]

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Human Adult Glial Progenitors Are Transcriptionally Distinct from Their Fetal Counterparts [scRNA-seq]

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