Peritoneal metastasis (PM) is the major cause of recurrence in patients with gastric cancer (GC) and associated poor prognosis. The oncogenic role Nicotinamide N-methyltransferase (NNMT) GC has been reported, but secreted NNMT that transported by exosomes remains unknown. In this study, were isolated from or without PM cell line, including GC-114, GC-026, MKN45, SNU-16 cells. contents significa...