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Background:   Long non-coding RNA bladder cancer associated transcript 1 (BLACAT1) is oncogenic in several types of cancers. However, little is known concerning its expression and function in prostate cancer.Methods:   Paired prostate cancer samples were collected, and the expression levels of BLACAT1, miR-29a-3p and disheveled segment polarity protein 3 (DVL3) were examined by quantitative real-time polymerase chain reaction (qRT-PCR); BLACAT1 shRNAs were transfected into PC-3 and LNCaP cell lines, and proliferative ability was detected by cell counting kit-8 (CCK-8) assay; qRT-PCR and Western blot were used to analyze the changes of miR-29a-3p and DVL3; dual-luciferase reporter gene assay was used to determine the regulatory relationships between miR-29a-3p and BLACAT1, and miR-29a-3p and DVL3.Results:   BLACAT1 expression was significantly up-regulated in cancerous tissues of prostate cancer samples and positively correlated with the expression of DVL3, while negatively associated with miR-29a-3p. After the transfection of BLACAT1 shRNAs into prostate cancer cells, the proliferative ability and metastatic ability of cancer cells were significantly inhibited; BLACAT1 shRNAs could reduce the expression of DVL3 on both mRNA and protein expressions levels, the luciferase activity of BLACAT1 reporter was inhibited by miR-29a-3p, and DVL3 was validated as a target gene of miR-29a-3p.Conclusion:   BLACAT1 expression is abnormally up-regulated in prostate cancer tissues. BLACAT1 can modulate the proliferative and metastatic ability of prostate cancer cells and have the potential to be the “ceRNA” to regulate the expression of DVL3 by sponging miR-29a-3p.

LncRNA BLACAT1 Promotes Proliferation, Migration and Invasion of Prostate Cancer Cells via Regulating miR-29a-3p/DVL3 Axis