VAMP7 and leukemia: Moreover, although VAMP7, a well-known late endosomal and lysosomal R-SNARE (Advani et al., 1999), has been shown to promote exosome release from human leukemia K562 cells (Fader et al., 2009), VAMP7 inhibition has been reported not to affect exosome release from epithelial Madin-Darby canine kidney (MDCK) cells (Proux-Gillardeaux et al., 2007).