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Updated: Feb 12, 2026

Clinicopathological Analysis of miRNA Expression in Breast Cancer Tissues by Using miRNA In Situ Hybridization
Published on: June 7, 2016
Functional miRNAs in breast cancer drug resistance
Weizi Hu1,2,3, Chunli Tan1,2,3, Yunjie He4
1Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University.
Abstract:
Owing to improved early surveillance and advanced therapy strategies, the current death rate due to breast cancer has decreased; nevertheless, drug resistance and relapse remain obstacles on the path to successful systematic treatment. Multiple mechanisms responsible for drug resistance have been elucidated, and miRNAs seem to play a major part in almost every aspect of cancer progression, including tumorigenesis, metastasis, and drug resistance. In recent years, exosomes have emerged as novel modes of intercellular signaling vehicles, initiating cell-cell communication through their fusion with target cell membranes, delivering functional molecules including miRNAs and proteins. This review particularly focuses on enumerating functional miRNAs involved in breast cancer drug resistance as well as their targets and related mechanisms. Subsequently, we discuss the prospects and challenges of miRNA function in drug resistance and highlight valuable approaches for the investigation of the role of exosomal miRNAs in breast cancer progression and drug resistance.
Insights
MicroRNAs (miRNAs) are key players in breast cancer drug resistance. Exosomal miRNAs offer promising therapeutic targets and diagnostic biomarkers for overcoming treatment challenges.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Breast cancer survival rates have improved, but drug resistance and relapse remain significant challenges.
- MicroRNAs (miRNAs) are implicated in various cancer progression aspects, including drug resistance.
- Exosomes are emerging as crucial intercellular communication vehicles, transporting functional molecules like miRNAs.
Purpose of the Study:
- To enumerate functional miRNAs involved in breast cancer drug resistance.
- To identify miRNA targets and elucidate related mechanisms.
- To discuss the prospects and challenges of targeting miRNAs and exosomal miRNAs in breast cancer therapy.
Main Methods:
- Literature review focusing on miRNAs and exosomes in breast cancer drug resistance.
- Analysis of studies identifying specific miRNAs, their targets, and resistance mechanisms.
- Discussion of current research and future directions for exosomal miRNA investigation.
Main Results:
- Numerous miRNAs have been identified as critical regulators of breast cancer drug resistance.
- Specific miRNA-target interactions and pathways contributing to resistance are elucidated.
- Exosomal miRNAs play a significant role in mediating intercellular communication and drug resistance.
Conclusions:
- miRNAs are pivotal in breast cancer progression and drug resistance.
- Exosomal miRNAs represent a promising avenue for therapeutic intervention and biomarker development.
- Further research into exosomal miRNA function is crucial for overcoming treatment resistance.
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