Induction of IL-12 production in human peripheral monocytes by Trypanosoma cruzi Is mediated by glycosylphosphatidylinositol-anchored mucin-like glycoproteins and potentiated by IFN- gamma and CD40-CD40L interactions
Department of Medicine, Division of Infectious Diseases and Immunology
Antigens, CD40; CD40 Ligand; Cells, Cultured; Glycoproteins; Glycosylphosphatidylinositols; Humans; Interferon-gamma; Interleukin-12; Monocytes; Mucins; Protein Binding; Trypanosoma cruzi
Immunopathology | Parasitic Diseases | Parasitology
Chagas disease, caused by the protozoan parasite Trypanosoma cruzi (T. cruzi), is characterized by immunopathology driven by IFN-gamma secreting Th1-like T cells. T. cruzi has a thick coat of mucin-like glycoproteins covering its surface, which plays an important role in parasite invasion and host immunomodulation. It has been extensively described that T. cruzi or its products-like GPI anchors isolated from GPI-anchored mucins from the trypomastigote life cycle stage (tGPI-mucins)-are potent inducers of proinflammatory responses (i.e., cytokines and NO production) by IFN-gamma primed murine macrophages. However, little is known about whether T. cruzi or GPI-mucins exert a similar action in human cells. We therefore decided to further investigate the in vitro cytokine production profile from human mononuclear cells from uninfected donors exposed to T. cruzi as well as tGPI-mucins. We observed that both living T. cruzi trypomastigotes and tGPI-mucins are potent inducers of IL-12 by human peripheral blood monocytes and this effect depends on CD40-CD40L interaction and IFN-gamma. Our findings suggest that the polarized T1-type cytokine profile seen in T. cruzi infected patients might be a long-term effect of IL-12 production induced by lifelong exposure to T. cruzi tGPI-mucins.
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DOI of Published Version
Mediators Inflamm. 2014;2014:345659. doi: 10.1155/2014/345659. Epub 2014 Jul 9. Link to article on publisher's site
Mediators of inflammation
Abel Jamli, Lucia Cristina; Ferreira Pinto, Ludmila Rodrigues; Cunha Navarro, Isabela; Baron, Monique Andrade; Kalil, Jorge; Gazzinelli, Ricardo T.; Rizzo, Luiz Vicente; and Cunha-Neto, Edecio, "Induction of IL-12 production in human peripheral monocytes by Trypanosoma cruzi Is mediated by glycosylphosphatidylinositol-anchored mucin-like glycoproteins and potentiated by IFN- gamma and CD40-CD40L interactions" (2014). Open Access Articles. 2524.
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