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Metastasis inhibition by BRMS1 and miR-31 replacement therapy in claudin-low cell lines
Samila Farokhimanesh1,2, Mehdi Forouzandeh Moghadam1, Marzieh Ebrahimi3
1Department of Medical Biotechnology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
Objectives:
The growing trend of research demonstrates that dynamic expression of two metastasis repressor classes (metastasis suppressor genes and anti-metastatic miRNA) has a close relationship with tumor invasion and metastasis. Using different strategies, it was revealed that cellular levels of miR-31 and Breast cancer Metastasis Suppressor1 (BRMS1) protein, which are among the most significant modulators of metastasis, have a correlation with the cell's capability for invading and metastasizing; cells containing higher levels of miR-31 or BRMS1 were less metastatic. This project was carried out to determine whether the combinations of miR-31 and BRMS1 genes are able to enhance the capability of repressing the claudin-low breast cancer cell (MDA-MB-231) invasion.
Materials And Methods:
This study used a restoration-based approach by miR-31 mimic and optimized BRMS1 gene sequences, which were cloned into a chimeric construct and transfected to the MDA-M231cells.
Results:
Our data revealed that the simultaneous expression of anti-metastasis miR and metastasis suppressor might inhibit migration and invasion in MDA-MB-231 cells efficiently.
Conclusion:
This combinatorial use of anti-metastatic miR and gene suggests a new therapeutic intervention for metastasis inhibition in MDA-MB-231.
Insights
Combining miR-31 and Breast cancer Metastasis Suppressor1 (BRMS1) gene therapy effectively suppressed metastasis in claudin-low breast cancer cells. This approach offers a promising new strategy for inhibiting cancer cell invasion and metastasis.
Area of Science:
- Oncology
- Molecular Biology
- Gene Therapy
Background:
- Metastasis involves dynamic expression of metastasis suppressors like miR-31 and BRMS1.
- Higher levels of miR-31 or BRMS1 correlate with reduced cancer cell invasion and metastasis.
- Claudin-low breast cancer cells (MDA-MB-231) are highly invasive.
Purpose of the Study:
- To investigate if combined miR-31 and BRMS1 can enhance the repression of MDA-MB-231 cell invasion.
- To evaluate the synergistic effect of metastasis suppressor genes and anti-metastatic miRNAs.
Main Methods:
- Restoration-based approach using miR-31 mimic and optimized BRMS1 gene sequences.
- Chimeric construct preparation and transfection into MDA-MB-231 cells.
Main Results:
- Simultaneous expression of miR-31 and BRMS1 significantly inhibited MDA-MB-231 cell migration and invasion.
- The combined therapy demonstrated efficient suppression of metastatic capabilities.
Conclusions:
- The combinatorial use of anti-metastatic miR-31 and BRMS1 gene therapy presents a novel therapeutic strategy.
- This approach holds potential for metastasis inhibition in claudin-low breast cancer.
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