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04 January 2019 : Laboratory Research  

Expression of Tripartite Motif-Containing Proteactiin 11 (TRIM11) is Associated with the Progression of Human Prostate Cancer and is Downregulated by MicroRNA-5193

Yue Pan12B, Riyan Zhang3B, Hongde Chen2B, Wei Chen2B, Keming Wu2B, Jiaju Lv1A*

DOI: 10.12659/MSM.911818

Med Sci Monit 2019; 25:98-106

Abstract

BACKGROUND: Tripartite motif-containing protein 11 (TRIM11), encoded by the TRIM11 gene, has been studied in some human malignant tumors. MicroRNA-5193 (miRNA-5193) was predicted to target TRIM11, according to bioinformatics data from TargetScan. However, the roles of TRIM11 and miRNA-5193 in prostate cancer remain unknown. This study aimed to investigate the regulatory effects of miRNA-5193 on the expression of TRIM11 in prostate cancer tissues compared with adjacent normal prostate, and in human prostate cancer cell lines, PC3 and DU145 in vitro.

MATERIAL AND METHODS: Prostate tumor tissue and adjacent normal tissue from 137 patients with stage T1c (n=66), stage T2 (n=48), and stage T3 (n=23) prostate cancer were studied. Expression levels of the TRIM 11 protein and the TRIM11 gene in prostate cancer, normal prostate tissue, and human prostate cancer cell lines, PC3 and DU145, were measured by Western blot and quantitative real-time polymerase chain reaction (qRT-PCR), respectively. Transfection with TRIM11 small interfering RNA (siRNA) resulted in gene knockdown. Transfection with a miR-5193 mimic resulted in overexpression of miR-5193. Proliferation and invasion assays were performed for PC3 and DU145 cells in vitro.

RESULTS: TRIM11 expression was upregulated in prostate cancer specimens compared with normal prostate tissue and was significantly correlated with reduced outcome. In human prostate cancer cell lines, PC3 and DU145, TRIM11 overexpression promoted cell proliferation. Upregulation of miR-5193 downregulated the expression of TRIM11.

CONCLUSIONS: TRIM11 was upregulated in prostate cancer tissue and was associated with reduced prognosis. TRIM11 expression increased cell proliferation in vitro and was downregulated by miR-5193.

Keywords: Prostatic Neoplasms, RNA, Small Interfering

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750