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Unknown,Transcriptomics,Genomics,Proteomics

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Defining CD4 T Cell Memory by the Epigenetic Landscape of CpG DNA Methylation

ABSTRACT: This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

ORGANISM(S): Homo sapiens

SUBMITTER: Daniel Salomon

PROVIDER: E-GEOD-59860 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Defining CD4 T cell memory by the epigenetic landscape of CpG DNA methylation.

Komori H Kiyomi HK Hart Traver T LaMere Sarah A SA Chew Pamela V PV Salomon Daniel R DR

Journal of immunology (Baltimore, Md. : 1950) 20150109 4

Memory T cells are primed for rapid responses to Ag; however, the molecular mechanisms responsible for priming remain incompletely defined. CpG methylation in promoters is an epigenetic modification, which regulates gene transcription. Using targeted bisulfite sequencing, we examined methylation of 2100 genes (56,000 CpGs) mapped by deep sequencing of T cell activation in human naive and memory CD4 T cells. Four hundred sixty-six CpGs (132 genes) displayed differential methylation between naive ...[more]

PMID: 25576597

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Defining CD4 T Cell Memory by the Epigenetic Landscape of CpG DNA Methylation [Bisulfite-Seq]

Project description:Memory T cells are primed for rapid responses to antigen; however, the molecular mechanisms responsible for priming remain incompletely defined. CpG methylation in promoters is an epigenetic modification, which regulates gene transcription. Using targeted bisulfite sequencing, we examined methylation of 2100 genes (56,000 CpG) mapped by deep sequencing to T cell activation in human naïve and memory CD4 T cells. 466 CpGs (132 genes) displayed differential methylation between naïve and memory cells. 21 genes exhibited both differential methylation and gene expression before activation, linking promoter DNA methylation states to gene regulation; 6 genes encode proteins closely studied in T cells while 15 genes represent novel targets for further study. 39 genes exhibited reduced methylation in memory cells coupled with increased gene expression with activation compared to naïve cells, revealing specific genes more rapidly expressed in memory compared to naïve cells and potentially regulated by DNA methylation. These findings define a DNA methylation signature unique to memory CD4 T cells and correlated with activation-induced gene expression. Targeted bisulfite sequencing of primary human naïve and memory CD4 T cells at rest and 48 hours post-activation.

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