Lupus & antiphospholipid syndrome

Myeloid‐Derived Suppressor Cell–Derived Interferon‐β Promotes T Follicular Helper Cell Response and Exacerbates Lupus Development

Arthritis RheumatolPublished Mechanistic study

Authors' conclusion

These results have demonstrated a novel function of IFN-β in promoting Tfh cell response during lupus progression

Study context

Population
Patients with systemic lupus erythematosus (SLE) and lupus mice
Methodological detailspatient correlation analysis, lupus mouse models, Ifnar1-/- mice, adoptive transfer, in vitro culture
  • Patient correlation analysis
  • Lupus mouse models
  • Ifnar1-/- mice
  • Adoptive transfer
  • In vitro culture

Main finding

As reported in the abstract

  • Increased T follicular helper (Tfh) cells with IFN-I-inducible gene signatures correlated with disease activities in patients with SLE
  • Interferon (IFN)-β treatment markedly enhanced Tfh cell response and exacerbated disease progression in lupus mice
  • IFNAR1 deficiency: attenuated lupus progression with significantly decreased Tfh response
  • IFN-β activated the IDO/Kyn/AhR axis to promote Tfh cell differentiation
  • Expanded myeloid-derived suppressor cells (MDSCs) in lupus produced high levels of IFN-β
  • Activated lymphocyte-derived DNA stimulated IFN-β production by MDSCs via cyclic GMP-AMP synthase-stimulator of IFN genes (cGAS-STING)-dependent pathway

Original publication

Myeloid‐Derived Suppressor Cell–Derived Interferon‐β Promotes T Follicular Helper Cell Response and Exacerbates Lupus Development. Arthritis Rheumatol. Published 11 February 2026. doi:10.1002/art.70004

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