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Acquired protective immune response in a fish-myxozoan model encompasses specific antibodies and inflammation resolution

AuthorsPicard-Sánchez, Amparo; Estensoro, Itziar ; Pozo, R. del; Piazzon de Haro, María Carla ; Palenzuela, Oswaldo ; Sitjà-Bobadilla, Ariadna
KeywordsAcquired immune response
Fish IgM
Sparus aurata
Enteromyxum leei
Parasite resistance
Gene expression
Issue DateJul-2019
CitationFish & Shellfish Immunology 90: 349-362 (2019)
AbstractThe myxozoan parasite Enteromyxum leei causes chronic enteritis in gilthead sea bream (GSB, Sparus aurata) leading to intestinal dysfunction. Two trials were performed in which GSB that had survived a previous infection with E. leei (SUR), and naïve GSB (NAI), were exposed to water effluent containing parasite stages. Humoral factors (total IgM and IgT, specific anti-E. leei IgM, total serum peroxidases), histopathology and gene expression were analysed. Results showed that SUR maintained high levels of specific anti-E. leei IgM (up to 16 months), expressed high levels of immunoglobulins at the intestinal mucosa, particularly the soluble forms, and were resistant to re-infection. Their acquired-type response was complemented by other immune effectors locally and systemically, like cell cytotoxicity (high granzyme A expression), complement activity (high c3 and fucolectin expression), and serum peroxidases. In contrast to NAI, SUR displayed a post-inflammatory phenotype in the intestine and head kidney, characteristic of inflammation resolution (low il1β, high il10 and low hsp90α expression).
Publisher version (URL)https://doi.org/10.1016/j.fsi.2019.04.300
Appears in Collections:(IATS) Artículos
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