Targeting cancer stem cells in solid tumors by vitamin D

Area of Science:

• Oncology
• Stem Cell Biology
• Molecular Biology

Background:

• Cancer stem cells (CSCs) drive tumor initiation, progression, and recurrence.
• CSCs exhibit high tumorigenicity and resistance to conventional chemotherapy.
• Specific markers (e.g., CD44, EpCAM, CD133) identify CSCs across various human cancers.

Purpose of the Study:

• To review the role of key signaling pathways (Notch, Hedgehog, Wnt, TGF-β) in CSC maintenance.
• To summarize the impact of vitamin D and its analogs on CSC signaling pathways.
• To highlight vitamin D as a potential therapeutic agent against CSCs.

Main Methods:

• Literature review of recent findings on CSCs and signaling pathways.
• Analysis of studies investigating vitamin D's effects on cancer stem cell biology.
• Synthesis of information regarding Notch, Hedgehog, Wnt, and TGF-β signaling in malignancies.

Main Results:

• Notch, Hedgehog, Wnt, and TGF-β signaling pathways are aberrantly activated in CSCs.
• These pathways are crucial for CSC self-renewal and differentiation in various cancers.
• Vitamin D and its analogs demonstrate inhibitory effects on CSC signaling pathways.

Conclusions:

• Aberrant stem cell signaling pathways are critical for CSC maintenance and progression.
• Vitamin D exhibits potential as a preventive and therapeutic agent targeting CSCs.
• Further research into vitamin D's mechanisms against CSCs is warranted.