Fig. 6
From: Gamma-glutamyltransferase activity in exosomes as a potential marker for prostate cancer
GGT activity in exosomes isolated by differential centrifugation from serum of PC and BPH patients. Exosomes were isolated by differential centrifugation from serum (210 μL) of PC (n = 31) and BPH (n = 8) patients. GGT activity was determined by incubation with gGlu-HMRG at room temperature for 1 h and measurement of fluorescence intensity (Ex/Em 490/520 nm) using microplate reader. Patient groups were compared for serum PSA concentration (a), serum GGT activity (b) and serum exosomal GGT activity (c). *p < 0.05, compared with BPH patients