SLC2A1 and renal cell carcinoma: Since GLUT-1’s mRNA is directly targeted by hsa-miRNA-144-5p and hsa-miRNA-186-3p [18,19,20,21], we performed an in vitro study to evaluate the intra- and extracellular levels of both miRNAs in HKC-8, 786-O and RCC-FG2 cell lines.