SLC2A1 and nonpapillary renal cell carcinoma: To understand the glycolysis state of ccRCC, we performed an in vitro study in which we evaluated the GLUT-1 mRNA levels, GLUT-1 protein levels, glucose consumption and lactate production in HKC-8, 786-O and RCC-FG2 cell lines, that mimic the ccRCC progression.