Abstract
Porcine bocavirus (PBoV) has a high prevalence in both healthy and diseased swine around the world. It was recently reported that PBoV and porcine circovirus type 2 (PCV2)—which contribute to porcine diarrheal disease—have a high rate of co-infection. To clarify the pathogenesis of PBoV, we examined the co-infection rate and effects of these two pathogens in IPEC-J2 porcine intestinal enterocytes. Both single and co-infection had cytopathic effects in IPEC-J2 cells. The apoptosis and proliferation rates of cells infected with both viruses did not differ significantly from those of cells infected with either one alone. PBoV and PCV2 induced the upregulation of inflammatory cytokines and the downregulation of the tight junction proteins occludin and claudin 1 in the early stage of infection, leading to destruction of epithelial barrier integrity and enhanced cytotoxicity. These findings provide insight into the pathogenic mechanisms of PBoV and PCV2 and a basis for develo** effective strategies to prevent the spread of gastrointestinal diseases in pigs and other livestock.
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Acknowledgements
This work was supported by the Natural Science Foundation of China (No. 31201942). The authors thank Prof. Dingren Bi for critical advice on the project.
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JZ and XrM designed the experiments and carried out molecular and statistical analyses. JZ performed the experiments and drafted the manuscript. YcL and AMM revised the manuscript. LxL performed the HE staining experiment. DrB, SwL, QgH, and XgK provided useful suggestions for the project. All authors read and approved the final manuscript.
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Zhang, J., Lu, Y., Li, S. et al. Co-infection with porcine bocavirus and porcine circovirus 2 affects inflammatory cytokine production and tight junctions of IPEC-J2 cells. Virus Genes 54, 684–693 (2018). https://doi.org/10.1007/s11262-018-1596-6
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DOI: https://doi.org/10.1007/s11262-018-1596-6