MicroRNA-183 (miR-183) has recently been identified to be implicated in a variety of
critical processes in multiple human malignancies, and its fuction has been poorly characterized
in gastric cancer (GC). Here we reported that miR-183 was markedly over-expressed in GC and
its up-regulation was markedly associated with GC clinicopathologicalcharacters. Endogenous
miR-183 was inhibited in GC cells, which dramatically attenuated cell proliferation, colony formation, migration, invasion and adhesion
and enhancedGC cells apoptosis in vitro. Furthermore, in this study we demonstrated that the tumor suppressor gene PDCD4 was a target
of miR-183 in GC. Collectively, these observations showed that miR-183 maybe function as an oncogene by regulating GC cell
proliferation, apoptosis and metastasis and the oncogenic effect of miR-183 may relate the direct targeting PDCD4.