Serum Cytokine Responses over the Entire Clinical-Immunological Spectrum of Human Leishmania (L.) infantum chagasi Infection

Author(s)

Ramos, Patricia Karla ; Carvalho, Karina Inacio ; Rosa, Daniela Santoro ; Rodrigues, Ana Paula ; Lima, Luciana Vieira ; Campos, Marliane Batista ; Gomes, Claudia Maria C. ; Laurenti, Marcia Dalastra ; Corbett, Carlos Eduardo ; Silveira, Fernando Tobias

• Document type: Journal article
• Source: BIOMED RESEARCH INTERNATIONAL; v. 2016, p. 8-pg., 2016-01-01.

Abstract

The clinical-immunological spectrum of human Leishmania (L.) infantum chagasi infection in Amazonian Brazil was recently reviewed based on clinical, DTH, and IFAT (IgG) evaluations that identified five profiles: three asymptomatic (asymptomatic infection, AI; subclinical resistant infection, SRI; and indeterminate initial infection, III) and two symptomatic (symptomatic infection, SI; American visceral leishmaniasis, AVL; and subclinical oligosymptomatic infection, SOI). TNF-alpha, IL-4, IL-6, and IL-10 serum cytokines were analyzed using multiplexed Cytometric Bead Array in 161 samples from endemic areas in the Brazilian Amazon: SI [AVL] (21 cases), III (49), SRI (19), SOI (12), AI (36), and a control group [CG] (24). The highest IL-6 serumlevels were observed in the SI profile (AVL); higher IL-10 serum levels were observed in SI than in SOI or CG and in AI and III than in SOI; higher TNF-alpha serum levels were seen in SI than in CG. Positive correlations were found between IL-6 and IL-10 serum levels in the SI and III profiles and between IL-6 and TNF-alpha and between IL-4 and TNF-alpha in the III profile. These results provide strong evidence for associating IL-6 and IL-10 with the immunopathogenesis of AVL and help clarify the role of these cytokines in the infection spectrum. (AU)

• FAPESP's process: 06/56319-1 - Leishmaniasis in Brazil: clinical and immunopathogenetic aspects of the human and experimental disease
• Grantee: Carlos Eduardo Pereira Corbett
• Support Opportunities: Research Projects - Thematic Grants