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Updated: Apr 19, 2026

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
Published on: February 21, 2014
A summary for molecular regulations of miRNAs in breast cancer
Shaymaa M M Yahya1, Ghada H Elsayed1
1Hormones Department, Medical Division, National Research Centre, Dokki, Cairo, Egypt.
Background:
Breast cancer is the most frequently diagnosed cancer and the leading cause of cancer-related death among women worldwide. MicroRNAs (miRNAs) are naturally-occurring, non-coding small RNA molecules that can modulate protein coding-genes, which makes it contributing to nearly all the physiological and pathological processes. Progression of breast cancer and resistance to endocrine therapies have been attributed to the possibility of hormone-responsive miRNAs involved in the regulation of certain signaling pathways.
Methodology:
This review introduces better understanding of miRNAs to provide promising advances for treatment. miRNAs have multiple targets, and they were found to regulate different signaling pathways; consequently it is important to characterize their mechanisms of action and their cellular targets in order to introduce miRNAs as novel and promising therapies.
Results:
This review summarizes the molecular mechanisms of miRNAs in TGF-beta signaling, apoptosis, metastasis, cell cycle, ER-signaling, and drug resistance.
Conclusion:
Finally, miRNAs will be introduced as promising molecules to be used in the fight against breast cancer and its developed drug resistance.
Insights
MicroRNAs (miRNAs) are key regulators in breast cancer progression and endocrine therapy resistance. Understanding their mechanisms offers promising new therapeutic strategies against this disease.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- Breast cancer is a leading cause of cancer death in women globally.
- MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression.
- Hormone-responsive miRNAs are implicated in breast cancer progression and endocrine therapy resistance.
Purpose of the Study:
- To enhance understanding of microRNA (miRNA) roles in breast cancer.
- To explore miRNA mechanisms for novel therapeutic development.
- To identify miRNA targets for improved breast cancer treatment.
Main Methods:
- This is a review article.
- Focuses on summarizing existing research on miRNA mechanisms.
- Covers signaling pathways, apoptosis, metastasis, cell cycle, ER-signaling, and drug resistance.
Main Results:
- MicroRNAs (miRNAs) regulate key signaling pathways including TGF-beta and ER-signaling.
- miRNAs are involved in critical cellular processes such as apoptosis and metastasis.
- miRNA dysregulation contributes to breast cancer progression and drug resistance.
Conclusions:
- MicroRNAs (miRNAs) show significant potential as therapeutic agents for breast cancer.
- Targeting miRNAs could overcome endocrine therapy resistance.
- Further research into miRNA mechanisms will advance breast cancer treatment.
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