| Summary: | Shengchun Dang,1,2 Abdul Malik,1 Jixiang Chen,1 Jianguo Qu,1 Kai Yin,1 Lei Cui,1 Min Gu3 1Department of General Surgery, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province 212001, People’s Republic of China; 2Department of General Surgery, Pucheng Hospital, Weinan, Shaanxi Province 715500, People’s Republic of China; 3Department of Oncology, Zhenjiang Hospital of Traditional Chinese and Western Medicine, Zhenjiang, Jiangsu 212001, People’s Republic of ChinaCorrespondence: Min GuDepartment of Oncology, Zhenjiang Hospital of Traditional Chinese and Western Medicine, Zhenjiang, Jiangsu 212001, People’s Republic of ChinaTel/Fax +86-511-88820988Email dangscjda@163.comIntroduction: Long non-coding RNAs (lncRNAs) have been demonstrated to participate in many biological processes and severs as important regulators during the progression of gastric cancer.Methods: Here, we introduced human lncRNA SNHG15 which was highly expressed in gastric cancer and cells. Interestingly, the expression of SNHG15 was correlated with programmed cell death ligand 1 (PD-L1), which promotes the resistance of gastric cancer cells to immune responses. Meanwhile, SNHG15 downregulation suppressed the expression of PD-L1 and resistance of immune responses.Results: Further, our results suggested that SNHG15 acted as a competing endogenous RNA (CeRNA) to sponge miR-141, which was downregulated in gastric cancers and negatively correlated to PD-L1.Conclusion: Our results suggested that SNHG15 improved the expression of PD-L1 by inhibiting miR-141, which in turn promoted the resistance of stomach cancer cells to the immune responses.Keywords: lncRNA SNHG15, gastric cancer, PD-L1, immuno-escape, miR-141
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