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Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
Published on: March 30, 2019
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Investigating miR-16-5p: The Tumor Suppressor That Influences Cell Cycle Genes in Colorectal Cancer
Seyedeh Nasibeh Mousavikia1,2, Maryam M Matin3,4, Mohammad Taghi Bahreyni-Toossi2
1Department of Medical Physics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Journal of Biomedical Physics & Engineering
|October 22, 2025
Summary
Hsa-miR-16-5p (miR-16-5p) acts as a tumor suppressor in colorectal cancer (CRC). Increasing miR-16-5p expression suppresses key cell cycle genes, potentially enhancing radiosensitivity for CRC treatment.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- Colorectal cancer (CRC) progression is linked to cell cycle dysregulation.
- Hsa-miR-16-5p (miR-16-5p) is a known tumor suppressor, but its role in CRC cell cycle modulation, especially under ionizing radiation, requires further elucidation.
Purpose of the Study:
- To investigate the effect of miR-16-5p on cell cycle gene expression in colorectal cancer cells.
- To determine how ionizing radiation influences miR-16-5p and cell cycle gene expression in CRC.
Main Methods:
- HT-29 colorectal cancer cells were transfected with miR-16-5p.
- Expression levels of miR-16-5p, CDK4, CCNE1, and CCND1 were quantified using real-time PCR.
- Cells were exposed to 4 Gy of ionizing radiation to assess treatment effects.
Main Results:
- Ionizing radiation downregulated endogenous miR-16-5p.
- miR-16-5p transfection suppressed CDK4, CCNE1, and CCND1 expression.
- Pre-treatment with miR-16-5p followed by irradiation significantly decreased CDK4, CCNE1, and CCND1 expression compared to irradiation alone.
Conclusions:
- miR-16-5p plays a significant role in regulating cell cycle genes in CRC.
- Enhancing miR-16-5p expression may improve radiosensitivity, offering a potential therapeutic strategy for CRC.
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