SLC2A1 and Familial prostate cancer: Using immunofluorescent labelling, the membrane-associated proteins Syndecan-1 and Sortilin, plus the glucose transporters GLUT1 and GLUT4, were observed inside/associated with TNT/cellular bridge structures connecting prostate cancer cells (in PC-3, LNCaP, LNCaP, and 22Rv1 cells, respectively) (Figure 3E).