Spleen and head kidney differential gene expression patterns in trout infected with Lactococcus garvieae correlate with spleen granulomas - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Veterinary Research Année : 2019

Spleen and head kidney differential gene expression patterns in trout infected with Lactococcus garvieae correlate with spleen granulomas

Rosario Castro
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Julio Coll
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María del Mar Blanco
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Antonio Rodriguez-Bertos
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Luc Jouneau
José Francisco Fernández-Garayzábal
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Alicia Gibello
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Résumé

AbstractLactococcus garvieae is a significant pathogen in aquaculture with a potential zoonotic risk. To begin to characterize the late immune response of trout to lactococcosis, we selected infected individuals showing clinical signs of lactococcosis. At the time lactococcosis clinical signs appeared, infection by L. garvieae induced a robust inflammatory response in the spleen of rainbow trout, which correlated with abundant granulomatous lesions. The response in kidney goes in parallel with that of spleen, and most of the gene regulations are similar in both organs. A correlation existed between the early inflammatory granulomas in spleen (containing macrophages with internalized L. garvieae) and up-regulated gene sets, which defined the presence of macrophages and neutrophils. This is the first analysis of the immune transcriptome of rainbow trout following L. garvieae infection during the initiation of adaptive immune mechanisms and shows a transcriptome induction of antibody response by both IgM (+) and IgT (+) spleen B cells to respond to systemic infection. These results increase our understanding of lactococcosis and pave the way for future research to improve control measures of lactococcosis on fish farms.
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hal-02120537 , version 1 (06-05-2019)

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Rosario Castro, Julio Coll, María del Mar Blanco, Antonio Rodriguez-Bertos, Luc Jouneau, et al.. Spleen and head kidney differential gene expression patterns in trout infected with Lactococcus garvieae correlate with spleen granulomas. Veterinary Research, 2019, 50 (1), pp.32. ⟨10.1186/s13567-019-0649-8⟩. ⟨hal-02120537⟩
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