UCA1 and cancer: LncRNAs could act as activators or inhibitors to participate in a variety of biological processes via interacting with DNAs, mRNAs, microRNAs or proteins.24, 25, 26 LncRNA UCA1 has been determined to be upregulated in multiple cancers including GC.13, 27, 28 Here in this study, we also found that UCA1 was significantly higher in GC tissues compared with matched nontumor tissues.