Labile iron accumulation augments T follicular helper cell differentiation

Yogesh Scindia, Borna Mehrad, Laurence Morel

Research output: Contribution to journalReview articlepeer-review

1 Scopus citations

Abstract

T follicular helper (Tfh) cells are a subset of CD4+ T cells that are essential in the pathogenesis of systemic lupus erythematosus (SLE). Notably, iron is required for activated CD4+ T lymphocytes to sustain high proliferation and metabolism. In this issue of the JCI, Gao et al. showed that CD4+ T cells from patients with SLE accumulated iron, augmenting their differentiation into Tfh cells and correlating with disease activity. Using human cells and murine models, the authors demonstrated that miR-21 was overexpressed in lupus T cells and inhibited 3-hydroxybutyrate dehydrogenase-2 (BDH2). The subsequent loss of BDH2 drove labile iron to accumulate in the cytoplasm and promoted TET enzyme activity, BCL6 gene demethylation, and Tfh cell differentiation. This work identifies a role for iron in CD4+ T cell biology and the development of pathogenic effectors in SLE. We await future investigations that could determine whether modulating iron levels could regulate Tfh cells in human health and disease.

Original languageEnglish (US)
Article numbere159472
JournalJournal of Clinical Investigation
Volume132
Issue number9
DOIs
StatePublished - May 2 2022
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

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