TNF-α and IL-10 Modulate CK and CK-MB Activities in Naturally Infected Dogs byLeishmania infantum

ABSTRACT

Background: Canine visceral leishmaniasis (CVL) is a multisystem inflammatory disease caused by the Leishmania genusprotozoa, characterized by increased production of pro-inflammatory mediators. The parasite presence has been reportedin various organs and tissues, such as bone marrow, lymph nodes, spleen, liver and skin, in addition the cardiac muscle.Cardiac muscle lesions provide the substances release, among which we can mention the creatine kinase (CK), its MBsubunit (CK-MB) and troponin. The changes that cause these injuries depend not only of the parasite presence, but alsothe increased concentrations of proinflammatory cytokines. Although most studies focus on the proinflammatory cytokinesaction, regulatory cytokines of the inflammatory process has gained evidence in the immune response to the Leishmaniainfantum and can be directly associated with the cardiac damage pathogenesis. Therefore, this study aimed to evaluate theTNF-α and IL-10 serum levels in naturally infected dogs by L. infantum and relates them to cardiac biomarkers, in thedifferent clinical forms of disease.Materials, Methods & Results: A total of 30 adult dogs were used, being 10 negative (ND) and 20 positive for CVL.All seropositive animals were subjected to clinical examination, observing the presence of characteristic clinical signs ofdisease, being divided into two groups asymptomatic (AD, n = 10) and symptomatic (SD, n = 10) dogs. Blood samplesfrom all animals were collected to obtain serum for subsequent measurement of TNF-α, IL-10, CK and CK-MB. Datawere analyzed by Kruskal-Wallys test, followed by Dunns test. The correlation and influence of TNF-α, IL-10 and IL-10/TNF-α on CK, CK-MB and CK-MB/CK, were determined by Spearman correlation test and linear regression. To evaluatethe relationship between the clinical signs onset and the TNF-α, IL-10, IL-10/TNF-α, CK, CK-MB and CK-MB/CK serum...(AU)