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CD4 expression in effector T cells depends on DNA demethylation over a developmentally established stimulus-responsive element
Journal article   Open access   Peer reviewed

CD4 expression in effector T cells depends on DNA demethylation over a developmentally established stimulus-responsive element

Athmane Teghanemt, Priyanjali Pulipati, Kara Misel-Wuchter, Kenneth Day, Matthew S Yorek, Ren Yi, Henry L Keen, Christy Au, Thorsten Maretzky, Prajwal Gurung, …
Nature communications, Vol.13(1), pp.1477-1477
03/18/2022
DOI: 10.1038/s41467-022-28914-4
PMCID: PMC8933563
PMID: 35304452
url
https://doi.org/10.1038/s41467-022-28914-4View
Published (Version of record) Open Access

Abstract

The epigenetic patterns that are established during early thymic development might determine mature T cell physiology and function, but the molecular basis and topography of the genetic elements involved are not fully known. Here we show, using the Cd4 locus as a paradigm for early developmental programming, that DNA demethylation during thymic development licenses a novel stimulus-responsive element that is critical for the maintenance of Cd4 gene expression in effector T cells. We document the importance of maintaining high CD4 expression during parasitic infection and show that by driving transcription, this stimulus-responsive element allows for the maintenance of histone H3K4me3 levels during T cell replication, which is critical for preventing de novo DNA methylation at the Cd4 promoter. A failure to undergo epigenetic programming during development leads to gene silencing during effector T cell replication. Our study thus provides evidence of early developmental events shaping the functional fitness of mature effector T cells.
CD4-Positive T-Lymphocytes - metabolism DNA Demethylation DNA Methylation Promoter Regions, Genetic - genetics

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