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Transcriptional signature of human pro-inflammatory TH17 cells

ABSTRACT: Transcriptional signature of human pro-inflammatory TH17 cells

PROVIDER: PRJNA407976 | ENA |

REPOSITORIES: ENA

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Transcriptional signature of human pro-inflammatory TH17 cells [TH17 clones]

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Autoimmunity and infection give rise to distict inflammatory Th17 subsets [bulk RNA-seq]

Project description:Th17 cells are a heterogeneous population that is critical for tissue homeostasis and inflammation during clearance of infections and autoimmunity. Despite substantial efforts distinguishing homeostatic and inflammatory roles of Th17 cells, the mechanism underlying the divergent functions of inflammatory Th17 cells is poorly understood. In this study, we show that the inflammatory Th17 engaged in autoimmune colitis and those involved in infection-induced colitis are two distinguishable populations illustrated by their distinct responses to a pharmacological molecule, clofazimine (CLF). Distinct from existing Th17 inhibitors, CLF selectively inhibits pro-autoimmune Th17 cells while preserving the functional state of infection-elicited Th17 cells through restricting Aldh1l2expression. Using bulk RNA sequencing, we explored transcriptional response to CLF on in vitro differentiated inflammatory and homeostatic Th17 cells. Notably, we identified a unique suppression in the transcription of signature inflammatory genes in Th17 cells with a marginal effect on those elicited by infection.

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Project description:The transcription factor IRF4 is crucial for the fate determination of pro-inflammatory T helper (Th)17 and the functionally opposing group of immunomodulatory regulatory T (Treg) cells. However, molecular mechanisms of how IRF4 steers diverse transcriptional programs in Th17 and Treg cells are far from being definitive. To unveil IRF4-driven lineage determination, we integrated data derived from affinity-purification and full mass spectrometry-based proteome analysis with chromatin immune precipitation sequencing. This allowed the characterization of subtype-specific molecular programs and the identification of IRF4 interactors in the Th17/Treg context. Our data reveal that IRF4-interacting transcription factors are recruited to IRF composite elements for the regulation of cell type-specific transcriptional programs as exemplarily demonstrated for FLI1, which in cooperation with IRF4 promotes Th17-specific gene expression. Inhibition of FLI1 markedly impaired Th17-differentiation. The present ‘omics’ dataset provides a valuable resource for studying IRF4-mediated gene regulatory programs in pro- and anti-inflammatory immune responses.

2025-03-05 | PXD060137 | JPOST Repository

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