Breast cancer stem cells: current advances and clinical implications

Area of Science:

• Oncology
• Stem Cell Biology

Background:

• Cancer stem cells (CSCs), also known as tumor-initiating cells, are implicated in driving tumor initiation, growth, metastasis, and therapeutic resistance in various cancers, including breast cancer.
• Breast cancer stem cells (BCSCs) exhibit phenotypic plasticity, transitioning between epithelial and mesenchymal states, and play a critical role in disease progression.

Purpose of the Study:

• To summarize recent advancements in cancer stem cell (CSC) research, with a specific focus on breast CSCs (BCSCs).
• To review methodologies for isolating and characterizing BCSCs, their cellular origins, and their role in metastasis and treatment resistance.

Main Methods:

• Review of current literature on CSCs and BCSCs.
• Discussion of isolation and characterization techniques for BCSCs.
• Examination of in vitro and clinical evidence, including patient-derived xenograft (PDX) models and circulating tumor cell (CTC) isolation.

Main Results:

• BCSCs are key drivers of breast cancer metastasis and resistance to therapy.
• Phenotypic plasticity enables BCSCs to switch between epithelial and mesenchymal states.
• Targeting specific signaling pathways regulating BCSC self-renewal is a potential therapeutic strategy.

Conclusions:

• Effective targeting of BCSCs holds significant potential for improving treatment outcomes in breast cancer patients.
• Understanding BCSC biology is crucial for developing novel therapeutic strategies.
• Further research into signaling pathways regulating BCSCs is warranted for clinical application.