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Updated: May 11, 2025

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
Published on: February 21, 2014
MicroRNAs as Endocrine Modulators of Breast Cancer
Vinitha Richard1, Kevin Lee2, Michael Joseph Kerin1,2
1Discipline of Surgery, Lambe Institute for Translational Research, University of Galway, H91 V4AY Galway, Ireland.
Abstract:
Breast cancer is an aggressive disease of multiple subtypes with varying phenotypic, hormonal, and clinicopathological features, offering enhanced resistance to conventional therapeutic regimens. There is an unmet need for reliable molecular biomarkers capable of detecting the malignant transformation from the early stages of the disease to enhance diagnosis and treatment outcomes. A subset of small non-coding nucleic acid molecules, micro ribonucleic acids (microRNAs/miRNAs), have emerged as promising biomarkers due to their role in gene regulation and cancer pathogenesis. This review discusses, in detail, the different origins and hormone-like regulatory functionalities of miRNAs localized in tumor tissue and in the circulation, as well as their inherent stability and turnover that determines the utility of miRNAs as biomarkers for disease detection, monitoring, prognosis, and therapeutic targets.
Insights
MicroRNAs (miRNAs) show promise as biomarkers for early breast cancer detection and monitoring. Their stability and regulatory roles in gene expression offer new avenues for diagnosis and targeted therapies.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Breast cancer presents diverse subtypes with therapeutic resistance.
- Early detection requires reliable molecular biomarkers.
- MicroRNAs (miRNAs) are small non-coding RNAs involved in gene regulation.
Purpose of the Study:
- To review the role of miRNAs as biomarkers in breast cancer.
- To discuss miRNA origins, functions, stability, and turnover.
- To highlight miRNA utility in detection, monitoring, prognosis, and therapy.
Main Methods:
- Literature review of scientific articles on miRNAs and breast cancer.
- Analysis of miRNA origins (tissue and circulation).
- Evaluation of miRNA regulatory functions and stability.
Main Results:
- miRNAs play crucial roles in gene regulation and cancer pathogenesis.
- miRNAs are found in both tumor tissue and circulation.
- miRNA stability and turnover are key to their biomarker potential.
Conclusions:
- miRNAs are promising biomarkers for early breast cancer detection.
- miRNAs can be used for disease monitoring and prognosis.
- miRNAs represent potential therapeutic targets for breast cancer treatment.
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