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LncRNA KB-1471A8.2 Overexpression Suppresses Cell Proliferation and Migration and Antagonizes the Paclitaxel Resistance of Ovarian Cancer Cells

LncRNA KB-1471A8.2 Overexpression Suppresses Cell Proliferation and Migration and Antagonizes the Paclitaxel Resistance of Ovarian Cancer Cells

Cancer BioTherapy and Radiopharmaceuticals 2019

The aim was to investigate the lncRNA KB-1471A8.2 function in ovarian cancer progression and paclitaxel resistance. The expression and distribution of KB-1471A8.2 was detected by qRT-PCR. The cell proliferation, apoptosis, invasion, migration and chemoresistance were analyzed by CCK8 assay, flow cytometry and transwell assay. The expression of DEPTOR, whose sequence is reverse overlapped with KB-1471A8.2 was analyzed by qRT-PCR, western blot and immunofluorescence. The cell cycle and the cell cycle related gene expression were analyzed by flow cytometry and qRT-PCR, respectively. KB-1471A8.2 was significantly downregulated in both ovarian cancer tissues and chemoresistant ovarian cancer cells. Overexpression of KB-1471A8.2 significantly inhibited the proliferation, invasion, migration, and paclitaxel resistance, and increased the apoptosis of ovarian cancer cells. KB-1471A8.2 was mainly distributed in the nucleus of ovarian cancer cells. KB-1471A8.2 overexpression significantly decreased the S phase cell ratio, increased the G0/G1 phase cell ratio, but not affected the expression and distribution of DEPTOR. However, cyclin-dependent kinase 4 (CDK4), which is an important regulator of G1/S transition, was significantly decreased in KB-1471A8.2-overexpressed ovarian cancer cells. KB-1471A8.2 could significantly inhibit the development and paclitaxel resistance of ovarian cancer cells, at least partly, by suppressing CDK4 expression.

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Accession: 066608094

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PMID: 30892073

DOI: 10.1089/cbr.2018.2698

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