EMBO Molecular Medicine (Jan 2024)

Interferon-epsilon is a novel regulator of NK cell responses in the uterus

  • Jemma R Mayall,
  • Jay C Horvat,
  • Niamh E Mangan,
  • Anne Chevalier,
  • Huw McCarthy,
  • Daniel Hampsey,
  • Chantal Donovan,
  • Alexandra C Brown,
  • Antony Y Matthews,
  • Nicole A de Weerd,
  • Eveline D de Geus,
  • Malcolm R Starkey,
  • Richard Y Kim,
  • Katie Daly,
  • Bridie J Goggins,
  • Simon Keely,
  • Steven Maltby,
  • Rennay Baldwin,
  • Paul S Foster,
  • Michael J Boyle,
  • Pradeep S Tanwar,
  • Nicholas D Huntington,
  • Paul J Hertzog,
  • Philip M Hansbro

DOI
https://doi.org/10.1038/s44321-023-00018-6
Journal volume & issue
Vol. 16, no. 2
pp. 267 – 293

Abstract

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Abstract The uterus is a unique mucosal site where immune responses are balanced to be permissive of a fetus, yet protective against infections. Regulation of natural killer (NK) cell responses in the uterus during infection is critical, yet no studies have identified uterine-specific factors that control NK cell responses in this immune-privileged site. We show that the constitutive expression of IFNε in the uterus plays a crucial role in promoting the accumulation, activation, and IFNγ production of NK cells in uterine tissue during Chlamydia infection. Uterine epithelial IFNε primes NK cell responses indirectly by increasing IL-15 production by local immune cells and directly by promoting the accumulation of a pre-pro-like NK cell progenitor population and activation of NK cells in the uterus. These findings demonstrate the unique features of this uterine-specific type I IFN and the mechanisms that underpin its major role in orchestrating innate immune cell protection against uterine infection.

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