GTSE1 and nonpapillary renal cell carcinoma: Meanwhile, we detected GTSE1 mRNA expression in ccRCC cells and a human renal tubular epithelial cell line (HK-2) and found that compared with HK-2 cells, 786-O, Caki-1, RCC-4, SW839, 769-P, and OS-RC-2 cells had higher GTSE1 mRNA expression levels (Figure 9A).