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  • Title: Long noncoding RNA OPA-interacting protein 5 antisense transcript 1 upregulated SMAD3 expression to contribute to metastasis of cervical cancer by sponging miR-143-3p.
    Author: Chen X, Xiong D, Yang H, Ye L, Mei S, Wu J, Chen S, Shang X, Wang K, Huang L.
    Journal: J Cell Physiol; 2019 Apr; 234(4):5264-5275. PubMed ID: 30341904.
    Abstract:
    OBJECTIVES: SMAD3 is pivotal in the biology functions of various tumors. This study is aiming to study the relationship among SMAD3, long noncoding RNAs (lncRNAs) OPA-interacting protein 5 antisense transcript 1 (OIP5-AS1), and miR-143-3p, and their effects on cervical cancer. METHODS: In our research, real-time polymerase chain reaction and western blot assay were conducted to detect the expression level of messenger RNA and protein in tumor tissues and cells. Transfection of lncRNA OIP5-AS1, miR-143-3p, or SMAD3 was performed to investigate their potential effects on the function of cell as well as the relationship among them in cervical cell lines via 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide) together with transwell assays or dual-luciferase reporter assay respectively. RESULTS: SMAD3, lncRNA OIP5-AS1 expression is significantly enhanced in cervical cancer tissues and cell lines, but miR-143-3p was inhibited. LncRNA OIP5-AS1 is demonstrated to mediate the physiological process of cervical cancer cells. Moreover, silencing SMAD3 via siRNA suppressed cell number, viability, migration and invasion, whereas overexpression of OIP5-AS1 promoted these abilities. Furthermore, lncRNA OIP5-AS1 exert its function via sponging miR-143-3p to regulate SMAD3 expression. CONCLUSIONS: LncRNA OIP5-AS1 promoted SMAD3 expression via mediating miR-143-3p to promote migration and invasion of cervical cancer cells.
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