The role of different DC subsets in priming and maintenance of immunity against Leishmania major (L. major) infection is debated. The transcription factor basic leucine zipper transcription factor, ATF‐like 3 (Batf3) is essential for the development of mouse CD103+ DCs and some functions of CD8α+ DCs. We found that CD103+ DCs were significantly reduced in the dermis of Batf3‐deficient C57BL/6 mice. Batf3−/− mice developed exacerbated and unresolved cutaneous pathology following a low dose of intradermal L. major infection in the ear pinnae. Parasite load was increased 1000‐fold locally and expanded systemically. Batf3 deficiency did not affect L. major antigen presentation to T cells, which was directly exerted by CD8α− conventional DCs (cDCs) in the skin draining LN. However, CD4+ T‐cell differentiation in the LN and skin was skewed to nonprotective Treg‐ and Th2‐cell subtypes. CD103+ DCs are major IL‐12 producers during L. major infection. Local Th1 immunity was severely hindered, correlating with impaired IL‐12 production and reduction in CD103+ DC numbers. Adoptive transfer of WT but not IL‐12p40−/− Batf3‐dependent DCs significantly improved anti‐L. major response in infected Batf3−/− mice. Our results suggest that IL‐12 production by Batf3‐dependent CD103+ DCs is crucial for maintenance of local Th1 immunity against L. major infection.
Batf3-dependent CD103+ dendritic cells are major producers of IL-12 that drive local Th1 immunity against Leishmania major infection in mice
María Martínez-López,S. Iborra,Ruth Conde-Garrosa,D. Sancho
Published 2014 in European Journal of Immunology
ABSTRACT
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- Publication year
2014
- Venue
European Journal of Immunology
- Publication date
2014-11-28
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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