Renibacterium salmoninarum iron-acquisition mechanisms and ASK cell line infection: Virulence and immune response

Jorn Bethke, Eloisa Arias-Muñoz, Alejandro Yáñez, Ruben Avendaño-Herrera

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

6 Citas (Scopus)


Renibacterium salmoninarum is the aetiological agent of bacterial kidney disease (BKD) in salmonid farms. This pathogen possesses at least three iron-acquisition mechanisms, but the link between these mechanisms and virulence is unclear. Therefore, this study used RT-qPCR to assess the effects of normal and iron-limited conditions on iron-uptake genes controlled by IdeR and related to iron acquisition in Chilean R. salmoninarum strain H-2 and the type strain DSM20767T. Further evaluated was the in vitro immune-related response of the Atlantic Salmon Kidney (ASK) cell line, derived from the primary organ affected by BKD. R. salmoninarum grown under iron-limited conditions overexpressed genes involved in haemin uptake and siderophore transport, with overexpression significantly higher in H-2 than DSM20767T. These overexpressed genes resulted in higher cytotoxicity and an increased immune response (i.e., TNF-α, IL-1β, TLR1 and INF-γ) in the ASK cell line. This response was significantly higher against bacteria grown under iron-limited conditions, especially H-2. These observations indicate that iron-acquisition mechanisms are possibly highly related to the virulence and pathogenic capacity of R. salmoninarum. In conclusion, treatments that block iron-uptake mechanisms or siderophore synthesis are attractive therapeutic approaches for treating R. salmoninarum, which causes significant aquaculture losses.

Idioma originalInglés
Páginas (desde-hasta)1283-1291
Número de páginas9
PublicaciónJournal of Fish Diseases
EstadoPublicada - sep 2019

Áreas temáticas de ASJC Scopus

  • Ciencias acuáticas
  • Veterinaria (miscelánea)


Profundice en los temas de investigación de 'Renibacterium salmoninarum iron-acquisition mechanisms and ASK cell line infection: Virulence and immune response'. En conjunto forman una huella única.

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