IL-17A regulates Eimeria tenella schizont maturation and migration in avian coccidiosis

Del Cacho, Emilio (Universidad de Zaragoza) ; Gallego, Margarita (Universidad de Zaragoza) ; Lillehoj, Hyun Soon ; Quílez, Joaquín (Universidad de Zaragoza) ; Lillehoj, Erik P ; Ramo, Ana ; Sánchez-Acedo, Caridad

Resumen: Although IL17A is associated with the immunological control of various infectious diseases, its role in host response to Eimeria infections is not well understood. In an effort to better dissect the role of IL17A in host-pathogen interactions in avian coccidiosis, a neutralizing antibody (Ab) to chicken IL17A was used to counteract IL17A bioactivity in vivo. Chickens infected with Eimeria tenella and treated intravenously with IL17A Ab, exhibited reduced intracellular schizont and merozoite development, diminished lesion score, compared with untreated controls. Immunohistological evaluation of cecal lesions in the parasitized tissues indicated reduced migration and maturation of second-generation schizonts and reduced lesions in lamina propria and submucosa. In contrast, untreated and infected chickens had epithelial cells harboring second-generation schizonts, which extend into the submucosa through muscularis mucosa disruptions, maturing into second generation merozoites. Furthermore, IL17A Ab treatment was associated with increased parameters of Th1 immunity (IL2- and IFN¿- producing cells), reduced levels of reactive oxygen species (ROS), and diminished levels of serum matrix metalloproteinase-9 (MMP-9). Finally, schizonts from untreated and infected chickens expressed S100, Wiskott-Aldrich syndrome protein family member 3 (WASF3), and heat shock protein-70 (HSP70) proteins as merozoites matured, whereas the expression of these proteins was absent in IL17A Ab-treated chickens. These results provide the first evidence that the administration of an IL17A neutralizing Ab to E. tenella-infected chickens inhibits the migration of parasitized epithelial cells, markedly reduces the production of ROS and MMP-9, and decreases cecal lesions, suggesting that IL17A might be a potential therapeutic target for coccidiosis control.

Idioma: Inglés

DOI: 10.1186/1297-9716-45-25

Año: 2014

Publicado en: VETERINARY RESEARCH 45, 25 (2014), 1-9
ISSN: 0928-4249

Factor impacto JCR: 2.815 (2014)

Categ. JCR: VETERINARY SCIENCES rank: 3 / 132 = 0.023 (2014) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/ES/DGA/A46

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Sanidad Animal (Departamento de Patología Animal)