Abstract
Avian leukosis virus (ALV) induces multiple avian tumors, growth decrease and immune suppression. Previously, a novel natural recombinant ALV isolate FJ15HT0 was proven to be associated with significant body weight decrease, immune suppression and lymphocytoma in infected SPF chickens. In order to uncover the interaction between virus and host, we compared differences in the transcriptomes of the thymuses from the mock chickens and simulated congenitally infected chickens at 5days (d), 13d and 21d of age by RNA-seq analysis of the thymuses. Signaling pathways including cytokine–cytokine receptor interactions, peroxisome proliferator-activated receptor (PPAR) signaling pathway, Janus tyrosine kinase/signal transducers and activators of transcription (Jak-STAT) signaling pathway and fatty acid degradation were involved in the interaction between FJ15HT0 and SPF chickens. Interestingly, fold change of ciliary neurotrophic factor receptor α (CNTFRα) in infected donor collected from 2d to 21d showed a significant positive correlation with the corresponding expression of the viral gp85 gene in thymuses (r=0.656, P<0.01) and in livers (r=0.525, P<0.05). It will provide new insights for the molecular pathogenesis of ALV infection.
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