DNA-damage response in tissue-specific and cancer stem cells

Area of Science:

• Stem cell biology
• Genomic integrity
• DNA damage response

Background:

• Tissue-specific stem cells (SCs) are vital for tissue homeostasis and repair.
• SCs exhibit differential responses to DNA damage across various tissues.
• The mechanisms underlying these responses and their consequences are not fully understood.

Purpose of the Study:

• To review how diverse SC populations sense and respond to DNA damage.
• To identify common and distinct DNA damage response mechanisms in tissue-specific SCs.
• To explore the impact of these mechanisms on SC genomic integrity, aging, and cancer development, including resistance in cancer stem cells (CSCs).

Main Methods:

• Literature review of recent studies on stem cells and DNA damage.
• Comparative analysis of SC responses to DNA damage across different tissues.
• Examination of molecular mechanisms involved in SC DNA damage sensing and repair.
• Discussion of the role of these mechanisms in aging, tissue atrophy, cancer, and therapeutic resistance.

Main Results:

• SCs employ diverse strategies to manage DNA damage, varying by tissue type.
• These mechanisms influence SC genomic stability, potentially contributing to aging and cancer.
• Similar DNA damage response pathways are active in cancer stem cells (CSCs).

Conclusions:

• Differential DNA damage responses in SCs have significant implications for tissue health and aging.
• Understanding these mechanisms is key to developing novel therapeutic strategies for cancer, particularly for overcoming chemo- and radiotherapy resistance in CSCs.