SLC2A1 and neoplasm: Given the enhanced expression of various proteins on tumor cell membranes, for the verification of in vivo PET findings, glucose transporter 1 (GLUT-1), GLUT-3, and transforming growth factor beta 1 (TGF- ß1) expressions were measured in the tumor-bearing and the healthy kidneys 14 days post-transplantation 30, 31.