Unique IL-13Rα2/STAT3 mediated IL-13 regulation detected in lung conventional dendritic cells, 24 h post viral vector vaccination

Sci Rep. 2020 Jan 23;10(1):1017. doi: 10.1038/s41598-020-57815-z.

Abstract

This study demonstrates that 24 h following viral vector-based vaccination IL-13Rα2 functions as a master sensor on conventional dendritic cells (cDCs), abetted by high protein stability coupled with minimal mRNA expression, to rapidly regulate DC mediated IL-13 responses at the lung mucosae, unlike IL-13Rα1. Under low IL-13, IL-13Rα2 performs as a primary signalling receptor, whilst under high IL-13, acts to sequester IL-13 to maintain homeostasis, both in a STAT3-dependent manner. Likewise, we show that viral vector-derived IL-13 levels at the vaccination site can induce differential STAT3/STAT6 paradigms in lung cDC, that can get regulated collaboratively or independently by TGF-β1 and IFN-γ. Specifically, low IL-13 responses associated with recombinant Fowlpox virus (rFPV) is regulated by early IL-13Rα2, correlated with STAT3/TGF-β1 expression. Whilst, high IL-13 responses, associated with recombinant Modified Vaccinia Ankara (rMVA) is regulated in an IL-13Rα1/STAT6 dependent manner associated with IFN-γR expression bias. Different viral vaccine vectors have previously been shown to induce unique adaptive immune outcomes. Taken together current observations suggest that IL-13Rα2-driven STAT3/STAT6 equilibrium at the cDC level may play an important role in governing the efficacy of vector-based vaccines. These new insights have high potential to be exploited to improve recombinant viral vector-based vaccine design, according to the pathogen of interest and/or therapies against IL-13 associated disease conditions.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Dendritic Cells / immunology*
  • Female
  • Fowlpox virus / immunology
  • Interferon-gamma / immunology
  • Interleukin-13 / immunology*
  • Interleukin-13 Receptor alpha1 Subunit / metabolism
  • Interleukin-13 Receptor alpha2 Subunit / metabolism*
  • Lung / cytology
  • Lung / immunology
  • Mice
  • Mice, Inbred BALB C
  • Mice, Knockout
  • STAT3 Transcription Factor / metabolism*
  • STAT6 Transcription Factor / metabolism
  • Transforming Growth Factor beta1 / immunology
  • Vaccination
  • Vaccines, Synthetic / immunology
  • Vaccinia virus / immunology
  • Viral Vaccines / immunology*

Substances

  • IFNG protein, mouse
  • Interleukin-13
  • Interleukin-13 Receptor alpha1 Subunit
  • Interleukin-13 Receptor alpha2 Subunit
  • STAT3 Transcription Factor
  • STAT6 Transcription Factor
  • Stat3 protein, mouse
  • Stat6 protein, mouse
  • Transforming Growth Factor beta1
  • Vaccines, Synthetic
  • Viral Vaccines
  • Interferon-gamma