The histone methyltransferase EZH2 primes the early differentiation of follicular helper T cells during acute viral infection.

Abstract:

:Epigenetic modifications to histones dictate the differentiation of naïve CD4+ T cells into different subsets of effector T helper (TH) cells. The histone methyltransferase enhancer of zeste homolog 2 (EZH2) has been implicated in the mechanism regulating the differentiation of TH1, TH2 and regulatory T (Treg) cells. However, whether and how EZH2 regulates follicular helper T (TFH) cell differentiation remain unknown. Using a mouse model of acute lymphocytic choriomeningitis virus (LCMV) infection, we observed abundant EZH2 expression and associated H3K27me3 modifications preferentially in the early committed virus-specific TFH cells compared to those in TH1 cells. Ablation of EZH2 in LCMV-specific CD4+ T cells leads to a selective impairment of early TFH cell fate commitment, but not late TFH differentiation or memory TFH maintenance. Mechanistically, EZH2 specifically stabilizes the chromatin accessibility of a cluster of genes that are important for TFH fate commitment, particularly B cell lymphoma 6 (Bcl6), and thus directs TFH cell commitment. Therefore, we identified the chromatin-modifying enzyme EZH2 as a novel regulator of early TFH differentiation during acute viral infection.

journal_name

Cell Mol Immunol

authors

Chen X,Cao G,Wu J,Wang X,Pan Z,Gao J,Tian Q,Xu L,Li Z,Hao Y,Huang Q,Wang P,Xiao M,Xie L,Tang S,Liu Z,Hu L,Tang J,He R,Wang L,Zhou X,Wu Y,Chen M,Sun B,Zhu B,Huang J,Ye L

doi

10.1038/s41423-019-0219-z

subject

Has Abstract

pub_date

2020-03-01 00:00:00

pages

247-260

issue

3

eissn

1672-7681

issn

2042-0226

pii

10.1038/s41423-019-0219-z

journal_volume

17

pub_type

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