1. Silencing of FTX suppresses pancreatic cancer cell proliferation and invasion by upregulating miR-513b-5p
- Author
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Chunbo Zhao, Qian Zhang, Shan Li, and Wen Liu
- Subjects
0301 basic medicine ,Cancer Research ,Cell Survival ,miR-513b-5p ,Long non-coding RNA FTX ,Xenotransplantation mouse model ,lcsh:RC254-282 ,X-inactivation ,Flow cytometry ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Cell Movement ,Cell Line, Tumor ,Genetics ,medicine ,Animals ,Humans ,Gene silencing ,Neoplasm Invasiveness ,Viability assay ,Cell Proliferation ,Gene knockdown ,medicine.diagnostic_test ,Chemistry ,RNA ,Pancreatic cancer ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Xenograft Model Antitumor Assays ,Cell biology ,Gene Expression Regulation, Neoplastic ,Pancreatic Neoplasms ,MicroRNAs ,030104 developmental biology ,Oncology ,Cell culture ,Gene Knockdown Techniques ,030220 oncology & carcinogenesis ,Female ,RNA, Long Noncoding ,XIST ,Research Article - Abstract
Background Abnormal expression of long non-coding RNA (lncRNA) FTX (five prime to Xist), which is involved in X chromosome inactivation, has been reported in various tumors. However, the effect of FTX on the development of pancreatic cancer (PC) has not been elucidated. The purpose of this study was to explore the possible molecular mechanism of FTX in PC. Methods Quantitative real-time PCR (qRT-PCR) was used to measure the expression levels of FTX and miR-513b-5p in PC cell lines. Proliferation and apoptosis of PC cells were determined by CCK-8, Edu assay, and flow cytometry. Invasion and migration ability of PC cells were detected by Transwell assay and scratch test. Bioinformatics analysis, luciferase reporter gene assay, and RNA immunoprecipitation (RIP) assay were used to verify the direct binding between FTX and miR-513b-5p. The xenotransplantation mouse model was established to explore the effect of FTX and miR-513b-5p on the PC tumor growth in vivo. Results The expression levels of FTX were increased in PC cell lines, and silencing of FTX remarkably suppressed the invasion ability and cell viability. Besides, FTX could bind to miR-513b-5p as a competitive endogenous RNA, thus promoting the invasion and proliferation ability of PC cells. Moreover, knockdown of FTX inhibited the tumor growth and increased the expression levels of miR-513b-5p and apoptosis-related proteins in vivo. Conclusions FTX could directly combine with miR-513b-5p as a competitive endogenous RNA, thus promoting the occurrence and development of PC in vitro and in vivo.
- Published
- 2021