Fig. 1

Expression of PKD3 in OSCC and its relationship with EMT. a, b The expression of PKD3, PD-L1 and EMT markers was detected by western blot in OSCC cells and non-tumour cells of the oral epithelium. Densitometry was analysed, and the correlation between PKD3, PD-L1, and EMT marker proteins was determined. c Expression of PKD3, PD-L1, and EMT markers in OSCC tissues detected by immunohistochemistry. Black scale bars are 100 µm. PKD3, protein kinase D3; OSCC, oral squamous cell carcinoma; PD-L1, programmed death ligand-1; EMT, epithelial-mesenchymal transition