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 Immunoljournal_title
Cellular & molecular immunologyauthors
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 Ldoi
10.1038/s41423-019-0219-zsubject
Has Abstractpub_date
2020-03-01 00:00:00pages
247-260issue
3eissn
1672-7681issn
2042-0226pii
10.1038/s41423-019-0219-zjournal_volume
17pub_type
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