Molecular biology of breast cancer stem cells: potential clinical applications

Area of Science:

• Oncology
• Molecular Biology
• Cancer Stem Cell Research

Background:

• Breast cancer stem cells (CSCs) are implicated in treatment failure.
• Understanding CSC resistance mechanisms is crucial for improving patient outcomes.

Purpose of the Study:

• To review the molecular biology of breast CSCs and their resistance mechanisms.
• To explore novel therapeutic strategies targeting breast CSCs for improved survival.

Main Methods:

• Literature search of in vitro and in vivo studies on breast CSCs.
• Analysis of CSC molecular characteristics, including BCRP overexpression and radioresistance pathways.

Main Results:

• Breast CSCs exhibit resistance through BCRP overexpression, actively exporting chemotherapy agents.
• Wnt signaling pathway activation and glutathione gene overexpression contribute to radioresistance.
• Lapatinib shows efficacy against HER-2 positive breast CSCs, improving disease-free survival.
• Metformin, parthenolide, and oncolytic viruses are potential agents for targeting CSCs.

Conclusions:

• Targeting breast CSCs with novel agents alongside conventional chemotherapy is recommended for future clinical trials.
• Hypofractionation radiotherapy may be beneficial for residual disease post-chemotherapy.