Retinoic acid mediated clearance of Citrobacter rodentium in vitamin A deficient mice requires CD11b+ and T cells

Lindsay M. Snyder, Kaitlin L. McDaniel, Yuan Tian, Cheng Hsin Wei, Mary J. Kennett, Andrew D. Patterson, A. Catharine Ross, Margherita T. Cantorna

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Abstract

Vitamin A deficiency affects over 250 million preschool-age children worldwide and is associated with increased childhood mortality and risk of developing enteric infections. Vitamin A deficient (A–) mice developed chronic Citrobacter rodentium infection. A single oral dose of retinoic acid (RA) at d7 post-infection was sufficient to induce clearance of the pathogen in A– mice. RA treatment of A– mice induced il17 expression in the colon. In A– mice, colonic IL-17 was primarily produced by CD11b+ cells; however, in A+ mice, the major source of colonic IL-17 was CD4+ T cells. To determine the cellular targets of vitamin A required for host resistance to C. rodentium, mice that express a dominant negative (dn) retinoic acid receptor (RAR) in T cells (T-dnRAR) or macrophage/neutrophils (LysM-dnRAR) were used. T-dnRAR mice had T cells that produced a robust intestinal IL-17 response and for 40% of the mice was enough to clear the infection. The remainder of the T-dnRAR mice developed a chronic infection. A–LysM-dnRAR mice developed early lethal infections with surviving mice becoming chronically infected. RA treatment of A– LysM-dnRAR mice was ineffective for inducing colonic IL-17 or clearing C. rodentium. Retinoid signaling is required in T cells and CD11b+ cells for complete elimination of enteric pathogens.

Original languageEnglish (US)
JournalFrontiers in immunology
Volume10
Issue numberJAN
DOIs
StatePublished - Jan 1 2019

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All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology

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