Expression of concern for 'Upregulation of lncRNA SUMO1P3 promotes proliferation, invasion and drug resistance in gastric cancer through interacting with the CNBP protein' by Yinmou Guo <i>et al.</i>, <i>RSC Adv.</i>, 2020, <b>10</b>, 6006-6016, DOI: 10.1039/C9RA09497K. This evidence concerns the gene SUMO1P3 and gastric cancer.