Differential expression of the Toll-like receptor pathway and related genes of chicken bursa after experimental infection with infectious bursa disease virus

摘要

Infectious bursa disease virus causes an acute infection in bursal B cells. The Toll-like receptor (TLR) signaling pathway plays a key role in innate immunity during virus infection. In this study, an Agilent microarray was used to investigate different transcriptional profiles of the TLR pathway and related genes of chicken bursa at 48 h after infection with IBDV, compared with simulated infection. Expression of >58 genes changed significantly. Forty-six genes associated with chicken bursa proinflammatory effects, chemotactic effects, and T-cell stimulation were upregulated, which meant enhancement of these features. Twelve genes that are related to proliferation and differentiation of bursal cells were downregulated, implying suppression of these features. These results revealed that genes of the TLR pathway play an important role in the pathogenicity of IBDV infection. The findings are helpful for understanding the molecular basis of viral pathogenesis and the underlying mechanism of the host antiviral response.