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Updated: Apr 16, 2026

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
Published on: February 21, 2014
MicroRNAs-mediated cell fate in triple negative breast cancers
Xinbing Sui1, Xian Wang1, Weidong Han1
1Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China; Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, China.
Abstract:
MicroRNAs (miRNAs) are small non-coding RNAs that function as major modulators of posttranscriptional protein-coding gene expression in diverse biological processes including cell survival, cell cycle arrest, senescence, autophagy, and differentiation. The control of miRNAs plays an important role in cancer initiation and metastasis. Triple negative breast cancer (TNBC) is a distinct breast cancer subtype, which is defined by the absence of estrogen receptor (ER), progesterone receptor (PR) and epidermal growth factor receptor 2 (HER2/neu). Due to its high recurrence rate and poor prognosis, TNBC represents a challenge for breast cancer therapy. In recent years, a large number of microRNAs have been identified to play a crucial role in TNBC and some of them were found to be correlated with worse prognosis of TNBC. Thus, understanding the novel function of miRNAs may allow us to develop promising therapeutic targets for the treatment of TNBC patients.
Insights
MicroRNAs (miRNAs) are crucial regulators in cell processes and cancer. Understanding their role in triple-negative breast cancer (TNBC) may lead to new therapeutic targets for this challenging disease.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression.
- miRNAs are implicated in critical biological processes like cell survival, cell cycle, and differentiation.
- Dysregulation of miRNAs contributes to cancer initiation and metastasis.
Purpose of the Study:
- To highlight the significance of miRNAs in triple-negative breast cancer (TNBC).
- To underscore the challenges in TNBC therapy due to its aggressive nature.
- To emphasize the potential of miRNAs as therapeutic targets for TNBC.
Main Methods:
- Review of current literature on miRNA function in cancer.
- Analysis of the role of specific miRNAs in TNBC pathogenesis.
- Correlation of miRNA expression with TNBC prognosis.
Main Results:
- miRNAs are key players in various cellular functions relevant to cancer.
- TNBC, characterized by the absence of ER, PR, and HER2/neu, poses a therapeutic challenge.
- Several miRNAs have been identified to play crucial roles in TNBC and are linked to poor prognosis.
Conclusions:
- Understanding novel miRNA functions is essential for advancing TNBC treatment.
- miRNAs represent promising targets for developing novel therapeutic strategies for TNBC patients.
- Further research into miRNA mechanisms can improve outcomes for TNBC.
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