CD274 and lung carcinoma: It was found that while PD-L1 expression was elevated in quasi-epithelial cells (murine 393P and human HCC827) with persistent ZEB1 expression, it was elevated in mesenchymal lung cancer cell lines (human H157, H1155, H1299, and H460; murine 344SQ, 531LN2, and 393P ZEB1).