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Silenced LINC01963 enhanced the chemosensitivity of prostate cancer cells to docetaxel by sponging miR-216b-5p to inhibit TrkB protein level

ABSTRACT: Long noncoding RNAs (lncRNAs) affect docetaxel chemosensitivity. However, the biological role and regulatory mechanisms of lncRNAs in docetaxel-resistant prostate cancer remain unclear. Differences in lncRNAs were evaluated by lncRNA sequencing and evaluated using quantitative real-time polymerase chain reaction, and TrkB expression was measured through Western blot analysis. Proliferation was measured using the MTS, while apoptosis and cell cycle were measured using flow cytometry. Additionally, migration and invasion were measured using transwell assays. Forty-eight female BALB/c nude mice were used for subcutaneous tumorigenicity and lung metastasis assays. We found that LINC01963 was overexpressed in the PC3-DR cells. LINC01963 silencing enhanced the chemosensitivity of PC3-DR to docetaxel and inhibited tumorigenicity and lung metastasis, while LINC01963 overexpression enhanced the chemoresistance of PC3 cells to docetaxel. It was found that LINC01963 sponges miR-216b-5p. The miR-216b-5p inhibitor reversed the suppressive effect of sh-LINC01963 on PC3-DR cell proliferation, migration, and invasion. Furthermore, miR-216b-5p can bind to the 3’-UTR of NTRK2 and inhibit TrkB protein levels. TrkB enhances docetaxel resistance in prostate cancer and reverses the effects of LINC01963 silencing and miR-216b-5p overexpression. In conclusion, silencing LINC01963 enhanced the chemosensitivity of PC3-DR to docetaxel by sponging miR-216b-5p to inhibit TrkB protein levels.

ORGANISM(S): Homo sapiens

PROVIDER: GSE190648 | GEO | 2021/12/13

REPOSITORIES: GEO

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