Frontiers in Immunology (Jan 2021)

Integrin Alpha E (CD103) Limits Virus-Induced IFN-I Production in Conventional Dendritic Cells

  • Vikas Duhan,
  • Vikas Duhan,
  • Vishal Khairnar,
  • Vishal Khairnar,
  • Simo Kitanovski,
  • Thamer A. Hamdan,
  • Thamer A. Hamdan,
  • Andrés D. Klein,
  • Andrés D. Klein,
  • Judith Lang,
  • Murtaza Ali,
  • Tom Adomati,
  • Hilal Bhat,
  • Hilal Bhat,
  • Sarah-Kim Friedrich,
  • Fanghui Li,
  • Philippe Krebs,
  • Anthony H. Futerman,
  • Marylyn M. Addo,
  • Marylyn M. Addo,
  • Marylyn M. Addo,
  • Cornelia Hardt,
  • Daniel Hoffmann,
  • Philipp A. Lang,
  • Karl S. Lang

DOI
https://doi.org/10.3389/fimmu.2020.607889
Journal volume & issue
Vol. 11

Abstract

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Early and strong production of IFN-I by dendritic cells is important to control vesicular stomatitis virus (VSV), however mechanisms which explain this cell-type specific innate immune activation remain to be defined. Here, using a genome wide association study (GWAS), we identified Integrin alpha-E (Itgae, CD103) as a new regulator of antiviral IFN-I production in a mouse model of vesicular stomatitis virus (VSV) infection. CD103 was specifically expressed by splenic conventional dendritic cells (cDCs) and limited IFN-I production in these cells during VSV infection. Mechanistically, CD103 suppressed AKT phosphorylation and mTOR activation in DCs. Deficiency in CD103 accelerated early IFN-I in cDCs and prevented death in VSV infected animals. In conclusion, CD103 participates in regulation of cDC specific IFN-I induction and thereby influences immune activation after VSV infection.

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