Abstract
This study aimed to explore the role of miR-339-5p in ovarian cancer. The expression of miR-339-5p in seven ovarian cancer cell lines (Hey, SKOV3, OVCAR5, SKOV3-IP, A2780, CAOV3, and OVCA433) was detected by quantitative real-time polymerase chain reaction (qRT-PCR). The miR-339-5p mimic and inhibitor were used to regulate its expression. Migration, invasion, and proliferation were examined. A bioinformatics analysis was used to predict targets, and a dual-luciferase reporter system was applied for validation, along with Western blot verification. Additionally, the association of miR-339-5p and its target genes with ovarian cancer was analyzed based on The Cancer Genome Atlas (TCGA) database. OVCAR5 and SKOV3 had the highest and lowest miR-339-5p expression, respectively. Inhibition of miR-339-5p expression increased the migration and invasion of OVCAR5 cells, while in SKOV3 cells, upregulated miR-339-5p attenuated the migration and invasion ability. Modulation of miR-339-5p had no effect on proliferation. The genes nucleus accumbens associated 1(BEN and BTB (POZ) domain containing) (NACC1) and B cell lymphoma-6 (bcl6) were validated to be targets of miR-339-5p. Clinically, patients with a high expression of NACC1 had a high risk in the survival analysis. miR-339-5p inhibits migration and invasion in ovarian cancer by targeting NACC1 and BCL6. miR-339-5p may be a biomarker of metastasis in ovarian cancer; NACC1 had a predictive value for ovarian cancer progression.
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Weiwei Shan was the first author.
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Table S1
Primers list. (DOCX 14 kb)
Fig. S1
Luciferase activity of PAPPA and PRL1 3′UTR in SKOV3 cells. a Luciferase activity of the PAPPA 3′UTR reporter genes in SKOV3 cells. b The luciferase activity of PRL1 3′UTR reporter genes in SKOV3 cells. SKOV3 cells transfected with miR-339-5p mimic or its corresponding mimic control. The sequences of the miR-339-5p binding site are shown in the right panel. Student’s t test was used for the analysis. CTL, all stars negative control. (JPG 1024 kb)
Fig. S2
The survival analysis of BCL6 and miR-339-5p in serous ovarian cancer patients. HRs and 95% CIs and logrank p values are presented in the right quadrant of the plots. The numbers at risk are shown under the plot. a PFS analysis of BCL6. b PPS analysis of BCL6. c OS analysis of BCL6. d The survival analysis of miR-339-5p in ovarian cancer patients. The analysis was performed with GraphPad Prism 5.0. (GIF 279 kb)
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Shan, W., Li, J., Bai, Y. et al. miR-339-5p inhibits migration and invasion in ovarian cancer cell lines by targeting NACC1 and BCL6. Tumor Biol. 37, 5203–5211 (2016). https://doi.org/10.1007/s13277-015-4390-2
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DOI: https://doi.org/10.1007/s13277-015-4390-2