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Systematic decoding of cis gene regulation defines context-dependent control of the multi-gene costimulatory receptor locus in human T cells [CRISPRi]

GSE261330 Homo sapiens Other 28 samples Submitted 2024/03/24 Platform GPL18573
Summary
Cis-regulatory elements (CRE) interact with trans regulators to orchestrate gene expression, but how transcriptional regulation is coordinated in multi-gene loci has not been experimentally defined. We sought to characterize the CREs controlling dynamic expression of adjacent T cell costimulatory genes CD28, CTLA4, and ICOS encoding regulators of cell-mediated immunity. Tiling CRISPR interference (CRISPRi) screens in primary human T cells – both Conventional and Regulatory subsets – uncovered gene-, cell subset- and stimulation-specific CREs. Integrating these data with CRISPR knockout (KO) screens and ATAC-seq characterization identified trans regulators influencing chromatin states at specific CRISPRi-responsive elements to control costimulatory gene expression. Lastly, we discovered and extensively validated a critical CTCF boundary that governs this locus, serving to reinforce CRE interaction with CTLA4 while also preventing promiscuous activation of CD28. By systematically mapping CREs and associated trans regulators directly in primary human T cell subsets, this work overcomes longstanding experimental limitations to decode context-dependent gene regulatory programs in a complex, multi-gene locus critical to immune homeostasis.
Published in
Systematic decoding of cis gene regulation defines context-dependent control of the multi-gene costimulatory receptor locus in human T cells
Mowery CT, Freimer JW, Chen Z et al. · Nature genetics 2024 · PMID 38811842 · doi:10.1038/s41588-024-01743-5
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Also filed as BioProject PRJNA1086507. Searching any of these in the dataset finder brings you back here.

Study design
28 conditions, each sampled once — no replicated groups

Read from 28 sample titles: 28 distinct titles with little repetition. Check it against the sample list below before relying on it.

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