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Título: | Circulating immune complexes levels correlate with the progression of canine leishmaniosis in naturally infected dogs |
Autor: | Parody, Nuria; Cacheiro-Llaguno, Cristina; Osuna, Cristina; Renshaw-Calderón, Ana; Alonso, Carlos CSIC; Carnes, Jerónimo | Palabras clave: | Biomarkers Canine leishmaniosis Circulating immune complexes Leishmania infantum |
Fecha de publicación: | 7-sep-2019 | Citación: | Veterinary Parasitology 274 (2019) | Resumen: | Dogs are the main domestic reservoir of Leishmania infantum, and in cases of uncontrolled infection, a strong humoral immune response is elicited, which is inefficient against the parasites. Previous studies have suggested that an adequate antigen/antibody ratio, with a moderate prevalence of antigens with respect to the antibodies, could result in the formation of circulating immune complexes (CIC) in canine leishmaniosis (CanL). Deposition of these complexes in tissues has been associated with vasculitis, uveitis, arthritis, dermatitis and especially glomerulonephritis and renal failure. However, little is known about the relationship between the presence of CIC and disease progression. The aim of this study was to evaluate serum CIC level and its correlation with disease severity in infected dogs with different stages of disease and non-infected animals as a control. A total of 60 dogs were included in the study, classified according to the proposed LeishVet classification criteria: healthy non-infected (n = 13); healthy infected (n = 12); sick stage I (n = 9); sick stage II (n = 17); sick stage III (n = 8); and sick stage IV (n = 1). CIC were isolated from serum samples using a modified polyethylene glycol precipitation method, and their levels measured by ELISA and bicinchoninic acid protein assay. A nanoparticle tracking analysis was performed to investigate the relationship between the molecular size distribution of the CIC and disease progression. In conclusion, the results confirmed a positive association between CIC levels, their molecular size and disease progression that suggests a potential use of CIC as biomarkers of CanL. | Versión del editor: | http://dx.doi.org/10.1016/j.vetpar.2019.108921 | URI: | http://hdl.handle.net/10261/214302 | DOI: | 10.1016/j.vetpar.2019.108921 | Identificadores: | doi: 10.1016/j.vetpar.2019.108921 issn: 1873-2550 |
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