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Front. Immunol. | doi: 10.3389/fimmu.2018.00333

TOLEROGENIC TRANSCRIPTIONAL SIGNATURES OF STEADY STATE AND PATHOGEN-INDUCED DENDRITIC CELLS

Emilia Vendelova1,  Diyaa E. Ashour1,  Patrick Blank2,  Florian Erhard1, Antoine-Emmanuel Saliba3,  Ulrich Kalinke2 and  Manfred B. Lutz1*
  • 1Institute of Virology and Immunobiology, University of Würzburg, Germany
  • 2Institute for Experimental Infection Research, Twincore, Center for Experimental and Clinical Infection Research, Germany
  • 3Helmholtz-Institut für RNA-basierte Infektionsforschung (HIRI), Germany

Dendritic cells (DCs) are key directors of tolerogenic and immunogenic immune responses. During the steady state, DCs maintain T cell tolerance to self-antigens by multiple mechanisms including inducing anergy, deletion and Treg activity. All of these mechanisms help to prevent autoimmune diseases or other hyper-reactivities. Different DC subsets contribute to pathogen recognition by expression of different subsets of pattern recognition receptors, including Toll-like receptors or C-type lectins. In addition to the triggering of immune responses in infected hosts, most pathogens have evolved mechanisms for evasion of targeted responses. One such strategy is characterized by adopting the host's T cell tolerance mechanisms. Understanding these tolerogenic mechanisms is of utmost importance for therapeutic approaches to treat immune pathologies, tumors and infections. Transcriptional profiling has developed into a potent tool for DC subset identification. Here, we review and compile pathogen-induced tolerogenic transcriptional signatures from mRNA profiling data of currently available bacteria- or helminth-induced transcriptional signatures. We compare them with tolerogenic steady-state DC subtypes to identify common and divergent strategies of pathogen induced immune evasion. Candidate molecules are discussed in detail. Our analysis provides further insights into tolerogenic DC signatures and their exploitation by different pathogens.

Keywords: Tolerogenic dendritic cells, steady-state dendritic cells, Transcription, Genetic, Bacteria, mycobacteria, Helminths, immune evasion by microbes

Received: 24 Oct 2017; Accepted: 06 Feb 2018.

Edited by:

Catharien Hilkens, Newcastle University, United Kingdom

Reviewed by:

Nathalie Cools, University of Antwerp, Belgium
Eva M. Caceres, Universitat Autònoma de Barcelona, Spain  

Copyright: © 2018 Vendelova, Ashour, Blank, Erhard, Saliba, Kalinke and Lutz. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Manfred B. Lutz, University of Würzburg, Institute of Virology and Immunobiology, Versbacherstrasse 7, Würzburg, 87078, Germany, m.lutz@vim.uni-wuerzburg.de