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MicroRNA-33b replacement effect on growth and migration inhibition in ovarian cancer cells
Jin Liu1, Weiming Wang1, Limin Chen1
1Department of Gynecology, Affiliated Hospital of Hebei University, Baoding, China.
Purpose:
Ovarian cancer is a devastating gynecological disease which is considered the major cause of cancer fatality around the world. The down-regulation of microRNA-33b (miR-33b) was reported in some malignancies. Hence, we transfected the miR-33b mimic into SKOV3 cells and evaluated the impacts of this interference on the growth and migration repression of these tumor cells as well as on targeted genes expression.
Methods:
In our study, transfecting the miR-33b mimic and inhibitor, negative control (NC), and NC inhibitor were established using Lipofectamine 2000. The cytotoxic effects of miR-33b were evaluated by MTT. To assess the miR-33b effects on cell migration, a scratching test was applied. The expression levels of miR-33b, ADAMTS, C-Myc, MMP9, K-Ras, and CXCR4 were evaluated using qRT-PCR.
Results:
These findings indicate that transfection of miR-143 mimic had no marked effects on the SKOV3 cell line. As expected, miR-33b relative expression levels were as follows: miR-33b mimic >NC and NC inhibitor >miR-33b inhibitor (p < 0.01). Moreover, transfected miR-33b mimic could suppress SKOV3 cells' proliferation, whereas transfected miR-33b inhibitor could promote cell proliferation (p < 0.01). MiR-33b overexpression significantly down-regulated the MMP9, CXCR-4, c-Myc, ADAMTS, and K-Ras mRNA levels (p < 0.05).
Conclusion:
As expected, these results confirm the tumor-suppressive effect of miR-33b in the SKOV3 ovarian cancer cell line by reducing cell survival, proliferation, and migration.
Insights
MicroRNA-33b (miR-33b) suppresses ovarian cancer cell growth and migration. Overexpression of miR-33b in SKOV3 cells reduced proliferation and key oncogene expression, confirming its tumor-suppressive role.
Area of Science:
- Oncology
- Molecular Biology
- Gene Regulation
Background:
- Ovarian cancer is a leading cause of cancer death globally.
- Down-regulation of microRNA-33b (miR-33b) is observed in several cancers.
- Understanding miR-33b's role is crucial for developing targeted therapies.
Purpose of the Study:
- To investigate the impact of miR-33b on ovarian cancer cell behavior.
- To evaluate miR-33b's effect on SKOV3 cell proliferation and migration.
- To analyze the modulation of target genes by miR-33b.
Main Methods:
- Transfection of miR-33b mimic and inhibitor into SKOV3 cells.
- Cytotoxicity assessed using MTT assay.
- Cell migration evaluated via scratching assay.
- Gene expression analysis using qRT-PCR for miR-33b, ADAMTS, C-Myc, MMP9, K-Ras, and CXCR4.
Main Results:
- miR-33b mimic transfection suppressed SKOV3 cell proliferation, while inhibitor promoted it.
- Overexpression of miR-33b significantly downregulated MMP9, CXCR-4, c-Myc, ADAMTS, and K-Ras mRNA.
- miR-33b mimic transfection did not significantly affect miR-143 levels.
Conclusions:
- miR-33b exhibits a tumor-suppressive effect in the SKOV3 ovarian cancer cell line.
- miR-33b reduces ovarian cancer cell survival, proliferation, and migration.
- These findings support miR-33b as a potential therapeutic target in ovarian cancer.
