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Updated: Oct 12, 2025

Clinicopathological Analysis of miRNA Expression in Breast Cancer Tissues by Using miRNA In Situ Hybridization
Published on: June 7, 2016
Contribution of miRNAs in the Pathogenesis of Breast Cancer
Soudeh Ghafouri-Fard1, Ali Khanbabapour Sasi2, Atefe Abak3
1Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Abstract:
Breast cancer is the most frequently diagnosed cancer among females. Gene expression profiling methods have shown the deregulation of several genes in breast cancer samples and have confirmed the heterogeneous nature of breast cancer at the genomic level. microRNAs (miRNAs) are among the recently appreciated contributors in breast carcinogenic processes. These small-sized transcripts have been shown to partake in breast carcinogenesis through modulation of apoptosis, autophagy, and epithelial-mesenchymal transition. Moreover, they can confer resistance to chemotherapy. Based on the contribution of miRNAs in almost all fundamental aspects of breast carcinogenesis, therapeutic intervention with their expression might affect the course of this disorder. Moreover, the presence of miRNAs in the peripheral blood of patients potentiates these transcripts as tools for non-invasive diagnosis of breast cancer.
Insights
MicroRNAs (miRNAs) play a key role in breast cancer development and progression. Targeting these small molecules offers potential therapeutic strategies and non-invasive diagnostic tools for breast cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Breast cancer is a leading cancer diagnosis in women, characterized by genomic heterogeneity.
- Gene expression profiling reveals numerous gene alterations in breast cancer.
- MicroRNAs (miRNAs) are emerging as critical regulators in breast carcinogenesis.
Purpose of the Study:
- To explore the role of miRNAs in breast cancer development.
- To investigate the potential of miRNAs as therapeutic targets.
- To assess miRNAs as non-invasive diagnostic biomarkers for breast cancer.
Main Methods:
- Review of current literature on miRNA function in breast cancer.
- Analysis of gene expression data related to miRNA deregulation.
- Evaluation of miRNA involvement in key cancer processes like apoptosis and metastasis.
Main Results:
- miRNAs are implicated in modulating apoptosis, autophagy, and epithelial-mesenchymal transition.
- miRNAs can influence chemotherapy resistance in breast cancer.
- miRNAs are detectable in peripheral blood, suggesting diagnostic potential.
Conclusions:
- miRNA expression modulation presents a promising therapeutic avenue for breast cancer.
- miRNAs hold significant potential as non-invasive biomarkers for early breast cancer detection.
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