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Updated: Jun 4, 2026
Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
Published on: March 30, 2019
MicroRNAs and the cell cycle
María José Bueno1, Marcos Malumbres
1Cell Division and Cancer Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain.
Abstract:
The control of cell proliferation by microRNAs (miRNAs) is well established and the alteration of these small, non-coding RNAs may contribute to tumor development by perturbing critical cell cycle regulators. Oncogenic miRNAs may facilitate cell cycle entry and progression by targeting CDK inhibitors or transcriptional repressors of the retinoblastoma family. On the other hand, tumor suppressor miRNAs induce cell cycle arrest by downregulating multiple components of the cell cycle machinery. Recent data also suggest that miRNAs act co-ordinately with transcriptional factors involved in cell cycle regulation such as c-MYC, E2F or p53. These miRNAs not only can potentiate the function of these factors but they may also limit the excessive translation of cell cycle proteins upon mitogenic or oncogenic stimuli to protect cells from replicative stress. The implications of these regulatory networks in cell proliferation and human disease are discussed.
Insights
MicroRNAs (miRNAs) regulate cell proliferation by targeting cell cycle genes. Dysregulated miRNAs can drive tumor development or suppress tumors by controlling cell cycle progression and protein translation.
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- MicroRNAs (miRNAs) are small, non-coding RNAs that play crucial roles in gene regulation.
- Aberrant miRNA expression is implicated in various human diseases, including cancer.
- miRNAs are known to control fundamental cellular processes like cell proliferation.
Purpose of the Study:
- To review the established roles of miRNAs in controlling cell proliferation.
- To discuss how altered miRNA expression contributes to tumor development.
- To explore the co-regulatory mechanisms between miRNAs and key cell cycle transcriptional factors.
Main Methods:
- Literature review of studies on miRNA function in cell cycle regulation.
- Analysis of mechanisms by which oncogenic and tumor suppressor miRNAs affect cell cycle proteins.
- Discussion of the interplay between miRNAs and transcriptional factors (e.g., c-MYC, E2F, p53).
Main Results:
- Oncogenic miRNAs promote cell cycle entry by targeting cell cycle inhibitors.
- Tumor suppressor miRNAs induce cell cycle arrest by downregulating cell cycle machinery.
- miRNAs cooperate with transcriptional factors to fine-tune cell cycle protein translation and prevent replicative stress.
Conclusions:
- miRNA-mediated regulation is critical for controlling cell proliferation.
- Dysregulation of these miRNA networks contributes to oncogenesis.
- Understanding these regulatory networks offers insights into potential therapeutic strategies for human diseases.
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