Novel therapeutic approaches to xeroderma pigmentosum

Area of Science:

• Genetics
• Molecular Biology
• Dermatology

Background:

• Xeroderma pigmentosum (XP) is a devastating genetic disorder caused by defects in nucleotide excision repair (NER).
• Advances in understanding NER pathway defects in XP have not been matched by therapeutic development.
• Current management relies on sun avoidance, highlighting the need for novel treatment strategies.

Purpose of the Study:

• To review the clinical presentation, molecular mechanisms, and current management of XP.
• To highlight recent insights into targeting downstream deficiencies caused by DNA repair defects.
• To explore novel therapeutic approaches for preventing skin cancer and neurological degeneration in XP patients.

Main Methods:

• This review discusses novel therapeutic strategies for XP.
• Focus is placed on addressing metabolic defects that occur downstream of NER pathway deficiencies.
• The review synthesizes current research on potential therapeutic interventions.

Main Results:

• Specific sulfonylureas enhance DNA damage clearance and UV resistance in XP cellular models.
• Nicotinamide demonstrates protective effects against UV radiation in XP cells.
• Caloric restriction has been shown to reduce DNA damage burden in animal models of XP.

Conclusions:

• Current clinical management of XP primarily involves sun avoidance, lacking disease-modifying therapies.
• Novel therapeutic approaches targeting metabolic deficiencies are warranted to improve patient outcomes.
• Targeting downstream effects of DNA repair defects offers a promising avenue for XP treatment.