Heritable Gene Regulation in the CD4:CD8 T Cell Lineage Choice

Overview

Journal Front Immunol

Specialty Allergy & Immunology

Date 2017 Apr 7

PMID 28382035

Citations 20

Authors

Priya D A Issuree

Charles P Ng

Dan R Littman

Affiliations

Soon will be listed here.

Abstract

The adaptive immune system is dependent on functionally distinct lineages of T cell antigen receptor αβ-expressing T cells that differentiate from a common progenitor in the thymus. CD4CD8 progenitor thymocytes undergo selection following interaction with MHC class I and class II molecules bearing peptide self-antigens, giving rise to CD8 cytotoxic and CD4 helper or regulatory T cell lineages, respectively. The strict correspondence of CD4 and CD8 expression with distinct cellular phenotypes has made their genes useful surrogates for investigating molecular mechanisms of lineage commitment. Studies of and transcriptional regulation have uncovered regulatory elements that are critical for mediating epigenetic modifications at distinct stages of development to establish heritable transcriptional programs. In this review, we examine the epigenetic mechanisms involved in and gene regulation during T cell lineage specification and highlight the features that make this an attractive system for uncovering molecular mechanisms of heritability.

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