ArticleBiochimica et biophysica acta. Gene regulatory mechanisms2024
Human stem cell-specific epigenetic signatures control transgene expression.
Article in Biochimica et biophysica acta. Gene regulatory mechanisms, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- One-step induction of human GABAergic neurons promotes presynaptic development & synapse maturation.bioRxiv : the preprint server for biology · 2025Article
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4 authors.
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Abstract
Human stem cell-derived models have emerged as an important platform to study tissue differentiation and disease mechanisms. Those models could capitalize on biochemical and cell biological methodologies such as omics, autophagy, and organelle dynamics. However, epigenetic silencing in stem cells creates a barrier to apply genetically encoded tools. Here we investigate the molecular mechanisms underlying exogenously expressed gene silencing by employing multiple commonly used promoters in human induced pluripotent stem cells (iPSCs), glioblastoma cells (GBM), and embryonic kidney cells (HEK). We discover that all promoters tested are highly methylated on the CpG island regions with lower protein expression in iPSCs, as compared to non-iPSCs. Elongation factor 1 alpha short (EF1α short or EFS) promoter, which has fewer CpG island number compared to the other promoters, can drive relatively higher gene expression in iPSCs, despite CpG methylation. Adding a minimal A2 ubiquitous chromatin opening element (minimal A2 UCOE or miniUCOE) upstream of a promoter inhibits CpG methylation and enhances gene expression in iPSCs. Our results demonstrate stem cell type-specific epigenetic modification of transgenic promoter region and provide useful information for designing anti-silencing strategies to increase transgene expression in iPSCs.
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