Vitiligo: pathogenetic hypotheses and targets for current therapies.

Area of Science:

• Dermatology
• Immunology
• Genetics

Background:

• Vitiligo is a multifactorial skin disorder causing depigmentation due to melanocyte loss.
• Non-segmental vitiligo (NSV) is progressive, often linked to genetics and autoimmunity, while segmental vitiligo (SV) may stabilize.
• Pathogenesis involves impaired antioxidant defenses, reactive oxygen species (ROS) accumulation, and mitochondrial dysfunction.

Purpose of the Study:

• To summarize popular hypotheses on vitiligo pathogenesis.
• To describe cellular, biochemical, and molecular alterations leading to melanocyte destruction.
• To discuss pathogenetic treatment approaches targeting cellular and molecular mechanisms.

Main Methods:

• Review of current literature on vitiligo pathogenesis.
• Analysis of cellular and molecular mechanisms involved in melanocyte destruction.
• Discussion of therapeutic strategies targeting specific pathways.

Main Results:

• Vitiligo pathogenesis involves a complex interplay of genetic predisposition, oxidative stress, and autoimmunity.
• Reactive oxygen species (ROS) and mitochondrial dysfunction contribute to melanocyte damage.
• Keratinocytes and melanocytes are affected, leading to apoptosis, aging, or melanocyte loss.

Conclusions:

• Vitiligo is a complex polygenic skin disorder with multiple contributing factors.
• Therapeutic strategies focus on immunosuppression and stimulating melanocyte proliferation and migration.
• Understanding cellular and molecular targets is crucial for effective vitiligo treatment.