GT-CAF exosomes increase cell number and survival of epithelial cells. (a) L3.6 cells were treated with GFP-CD63-CAF1 conditioned media for 48 hours and exosome uptake was visualized. (b) L3.6 cells were treated with L3.6, GT-PANC1, or GT-CAF1 exosomes for 6 days and total cells were counted. (c) L3.6 cells were treated with L3.6, GT-PANC1 or GT-CAF1 exosomes for 6 days and 1µM GEM for 3 days, and live cells were counted. (d) PANC1 cells were treated with PANC1 or GT-CAF1 exosomes for 6 days. AsPC1 cells were treated with AsPC1 or GT-CAF1 exosomes for 6 days. Total cells were counted. (e) PANC1 cells were treated with PANC1 or GT-CAF1 exosomes for 6 days, and AsPC1 cells were treated with AsPC1 or GT-CAF1 exosomes for 6 days. All cells were then treated with 1µM GEM for 3 days, and live cells were counted. *p-value<0.05; **p-value<0.01