miR-613 is downregulated in GC cell lines and tissues specimens. (A) Relative expression of miR-613 was detected in four GC cell lines and normal gastric cells using RT-qPCR. (B) Relative expression of miR-613 was measured in 38 pairs of GC tissues and ANT using RT-qPCR. Data are expressed as the mean ± standard deviation. *P<0.05, **P<0.01. miR, microRNA; RT-qPCR, reverse-transcription quantitative polymerase chain reaction; GC, gastric cancer; ANT, adjacent noncancerous tissues.