Compartmentalized immune response in leishmaniasis: Changing patterns throughout the disease

Alhelí Rodríguez-Cortés, Eugenia Carrillo, Susanna Martorell, Felicitat Todolí, Ana Ojeda, Alba Martínez-Flórez, Alicia Urniza, Javier Moreno, Jordi Alberola

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)

Abstract

© 2016 Rodríguez-Cortés et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Visceral leishmaniasis (VL) is characterized by loss of T-cell responsiveness and absence of Leishmania-specific IFN-γ production by peripheral blood mononuclear cells. However, the expressions of IFN-γ and TNF-α are up-regulated in the tissues and plasma of VL patients. There is a paucity of information regarding the cytokine profile expressed by different target tissues in the same individual and the changes it undergoes throughout the course of infection. In this work we evaluated IFN-γ, TNF-α, IL-10, and TGF-β mRNA expression using real-time RT-PCR in 5 target tissues at 6 months and 16 months post-infection (PI) in a canine experimental model which mimics many aspects of human VL. The spleen and liver of Leishmania infantum experimentally-infected dogs elicited a pro- and anti- inflammatory response and high parasite density at 6 and 16 months PI. The popliteal lymph node, however, showed an up-regulation of IFN-β cytokin at commencement of the study and was at the chronic phase when the IL-10 and TGF-β expression appeared. In spite of skin parasite invasion, local cytokine response was absent at 6 months PI. Parasite growth and onset of clinical disease both correlated with dermal up-regulation of all the studied cytokines. Our VL model suggests that central target organs, such as the spleen and liver, present a mixed cytokine immune response early on infection. In contrast, an antiinflammatory/regulatory immune response in peripheral tissues is activated in the later chronic-patent stages of the disease.
Original languageEnglish
Article numbere0155224
JournalPLoS ONE
Volume11
Issue number5
DOIs
Publication statusPublished - 1 May 2016

Fingerprint Dive into the research topics of 'Compartmentalized immune response in leishmaniasis: Changing patterns throughout the disease'. Together they form a unique fingerprint.

Cite this