Abstract
Porcine epidemic diarrhea (PED) is a highly contagious disease caused by the porcine epidemic diarrhea virus (PEDV), which results in significant economic losses. PEDV infection causes severe damage to the midgut barrier in the small intestine. YBX3, an important protein in tight junctions, promotes epithelial cell proliferation. However, its role in the process of PEDV infection remains unclear. In this study, we observed a significant increase in mRNA expression of YBX3 following PEDV infection. Additionally, the protein expression of YBX3 showed an initial increase followed by a decrease over time. Furthermore, treatment with 2% DSS resulted in a significant down-regulation of YBX3 mRNA and protein expression. Furthermore, we successfully generated knockout and overexpression cell lines of YBX3. Preliminary assays indicated that elevated expression of YBX3 inhibited the PEDV replication, while knockout of YBX3 had the opposite effect. In conclusion, our study has preliminarily revealed the functional role of YBX3 during PEDV infection. This finding lays the foundation for further investigation into its mechanism in future and also provides new insights into the mechanism of PEDV-host interactions.
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