EGFR and gastric cancer: We then evaluated EGFR and CD24 expression in malignant and non-malignant human gastric epithelial cells by qPCR and Western blotting, and found that both EGFR and CD24 expressions at both the mRNA and protein level were increased in gastric cancer cells (SGC-7901 and BGC-823) compared to non-malignant gastric epithelial cells (GES-1) (Fig. 1b, c).