title: microRNA-218 inhibits prostate cancer cell growth and promotes apoptosis by repressing TPD52 expression.
abstract: The tumor protein D52 (TPD52) is an oncogene overexpressed in prostate cancer (PC) due to gene amplification. Although the oncogenic effect of TPD52 is well recognized, how its expression is regulated is still not clear. This study tried to explore the regulative role of miR-218, a tumor suppressing miRNA on TPD52 expression and prostate cancer cell proliferation. We found the expression of miR-218 was significantly lower in PC specimens. Based on gain and loss of function analysis, we found miR-218 significantly inhibit cancer cell proliferation by inducing apoptosis. These results strongly suggest that miR-218 plays a tumor suppressor role in PC cells. In addition, our data firstly demonstrated that miR-218 directly regulates oncogenic TPD52 in PC3 cells and the miR-218-TPD52 axis can regulate growth of this prostate cancer cell line. Knockdown of TPD52 resulted in significantly increased cancer cell apoptosis. Clearly understanding of oncogenic TPD52 pathways regulated by miR-218 might be helpful to reveal new therapeutic targets for PC.
authors.affiliation: Urology Department, The First Affiliated Hospital of Xinxiang Medical University, Henan 453100, China. Electronic address: guangyehan@126.com.
authors.forename: Guangye
authors.initials: G
authors.lastname: Han
authors.affiliation: Urology Department, The First Affiliated Hospital of Xinxiang Medical University, Henan 453100, China. Electronic address: maochunfan@outlook.com.
authors.forename: Maochuan
authors.initials: M
authors.lastname: Fan
authors.affiliation: Urology Department, The First Affiliated Hospital of Xinxiang Medical University, Henan 453100, China. Electronic address: xinjunzhang11@163.com.
authors.forename: Xinjun
authors.initials: X
authors.lastname: Zhang
mesh_terms: D017209:Apoptosis / Q000235:genetics / Q000502:physiology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D055785:Gene Knockdown Techniques; D057809:HEK293 Cells; D006801:Humans; D008297:Male; D035683:MicroRNAs / Q000235:genetics / Q000378:metabolism*; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D011471:Prostatic Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology*
chemical_list: C547471:MIRN218 microRNA, human; D035683:MicroRNAs; D009363:Neoplasm Proteins; C114751:TPD52 protein, human
keywords: Apoptosis; Prostate cancer; TPD52; miR-218