Figure 2.
KO of HSP90AB1 suppresses PDCoV infection.A, qRT–PCR of HSP90AB1 mRNA and (B) protein levels in WT and KO cells. C, cell viability of WT and KO cells was evaluated by CCK-8 assay. D, PDCoV M mRNA levels and (E) viral titers in the cell supernatants at 24 hpi. F, N protein levels in WT and KO cells. G, IFA of PDCoV-infected WT and KO cells. Viral N protein was stained with FITC-anti-rabbit IgG (green), and nuclei were stained with DAPI (blue). Magnification = 10×, scale bar represents 100 μm. Data are shown as the mean ± SD from three independent experiments. CCK-8, Cell Counting Kit-8; DAPI, 4′,6-diamidino-2-phenylindole; HSP90AB1, heat shock protein 90 alpha family class B1; IFA, immunofluorescence assay; IgG, immunoglobulin G; PDCoV, porcine deltacoronavirus; qRT–PCR, quantitative RT–PCR.