Yan Xu1, Tongzhen Ji2, Ning An1, Xiuling Wang3,4, Hui Zhang5, Fengliang Xu5. 1. Department of Clinical Laboratory, Rizhao Central Hospital, Rizhao, 276800, Shandong Province, China. 2. Tuberculosis Department, Rizhao Tuberculosis Control Institute, Rizhao, 276800, Shandong Province, China. 3. Department of Clinical Laboratory, Rizhao Central Hospital, Rizhao, 276800, Shandong Province, China. lilywang305@aol.com. 4. Department of Clinical Laboratory, Rizhao People's Hospital, Rizhao, 276800, Shandong Province, China. lilywang305@aol.com. 5. Department of Endocrinology, Rizhao People's Hospital, Rizhao, 276800, Shandong Province, China.
Abstract
BACKGROUND: Non-coding RNAs have emerged as important regulators in human cancers. In this work, we investigated the role of long intergenic non-protein-coding RNA 943 (LINC00943) in gastric cancer (GC). METHODS: LINC00943 expression was evaluated in GC patient tissues and cell lines. In SNU-5 and MKN-45 cells, LINC00943 was knocked down to investigate its roles in regulating GC cell proliferation, 5-FU chemosensitivity and in vivo explant growth. Possible downstream target of LINC00943, human mature microRNA-101-3p (hsa-miR-101-3p) was also evaluated. RESULTS: LINC00943 was aberrantly overexpressed in in situ GC tumors and immortal GC cell lines. LINC00943 overexpression was associated with GC patients' poor prognosis. LINC00943 knockdown reduced GC cell proliferation, 5-FU resistance and in vivo explant growth. Hsa-miR-101-3p was found to be regulated by LINC00943 in GC. Hsa-miR-101-3p downregulation reversed the tumor-suppressing functions of LINC00943 knockdown in GC cells. CONCLUSION: In summary, our results indicated that LINC00943 was correlated with gastric cancer and regulates cancer cell proliferation and chemosensitivity via hsa-miR-101-3p.
BACKGROUND: Non-coding RNAs have emerged as important regulators in humancancers. In this work, we investigated the role of long intergenic non-protein-coding RNA 943 (LINC00943) in gastric cancer (GC). METHODS:LINC00943 expression was evaluated in GC patient tissues and cell lines. In SNU-5 and MKN-45 cells, LINC00943 was knocked down to investigate its roles in regulating GC cell proliferation, 5-FU chemosensitivity and in vivo explant growth. Possible downstream target of LINC00943, human mature microRNA-101-3p (hsa-miR-101-3p) was also evaluated. RESULTS:LINC00943 was aberrantly overexpressed in in situ GC tumors and immortal GC cell lines. LINC00943 overexpression was associated with GC patients' poor prognosis. LINC00943 knockdown reduced GC cell proliferation, 5-FU resistance and in vivo explant growth. Hsa-miR-101-3p was found to be regulated by LINC00943 in GC. Hsa-miR-101-3p downregulation reversed the tumor-suppressing functions of LINC00943 knockdown in GC cells. CONCLUSION: In summary, our results indicated that LINC00943 was correlated with gastric cancer and regulates cancer cell proliferation and chemosensitivity via hsa-miR-101-3p.