Development of adaptive immunity in rainbow trout, Oncorhynchus mykiss (Walbaum) surviving an infection with Yersinia ruckeri
Abstract
Development of adaptive immunity in rainbow trout (Oncorhynchus mykiss) surviving a primary infection with 5x10(5)CFU Yersinia ruckeri O1 (LD(50) dose) was investigated by transcriptome analysis of spleen tissue. These fish surviving a primary infection showed also a significantly increased survival following a secondary infection (same dose) when compared to naïve trout. The weight of the rainbow trout spleen doubled during the first 14 days of the primary infection but the affected organs subsequently recovered normal weight which remained constant during the re-infection period. Gene transcription in the spleen was measured using Quantitative real-time RT-PCR (qPCR). Samples taken 8h.p.i., 1, 3, 7, 14 and 28 d.p.i. were compared to PBS-injected control fish sampled at the same time points. The investigated cytokines and chemokines comprised interleukin (IL)-1beta, IL-1 receptor antagonist (Ra), IL-6, IL-8, IL-10, IL-11 and IFN-gamma, IL-1 receptor I and II (IL-RI and IL-RII). Transcript levels of genes encoding cytokines and receptors were increased during the primary infection but not during the secondary infection. Changes of T cell occurrence or activity in the spleen during the infections were inferred from the transcrip...Continue Reading
Citations
Thyroid signaling in immune organs and cells of the teleost fish rainbow trout (Oncorhynchus mykiss)
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