Effects of esophageal cancer cell-derived exosomes on cancer cell migration and invasion and its mechanism research

Objective To investigate the biological effects of exosomes secreted by KYSE410 cells on migration and invasion of KYSE410, KYSE510, YES2 cells and the possible mechanisms underlying the phenotype change. Methods The exosomes were isolated from the conditional supernatant of esophageal cancer cell line KYSE410 by ultracentrifugation. The morphology of exosomes was observed by transmission electron microscopy (TEM). Western blotting was used to detect the protein markers of exosomes. The uptaken of fluorescence-labeled KYSE410 exosomes by KYSE410, KYSE510 and YES2 was also recorded under confocal microscopy. Migration and invasion ability of the three esophageal carcinoma cell lines and the effects of exosomes from KYSE410 on migration and invasion of KYSE410, KYSE510 and YES2 cells were analyzed by Transwell chamber, respectively. The alteration of Wnt/β-catenin and PI3K/Akt pathway-related proteins were detected by Western blotting. Results The membrane structure of KYSE410 derived exosomes could be observed with its diameter ranged between 30-100nm. The invasion and migration ability of three esophageal cancer cells are KYSE410> KYSE510> YES2. KYSE410 exosomes promoted the migration and invasion of KYSE410, KYSE510 and YES2 cells. Conclusions Concentrated exosomes derived from the highly migratory and invasive esophageal cancer cell line KYSE410 promoted the migration and invasion potentials of itself and esophageal cancer cell lines KYSE510 and YES2, which possibly exerted the effects by activating Wnt/β-catenin and PI3K/Akt signaling pathways. DOI: 10.11855/j.issn.0577-7402.2017.04.07