Characteristics and pathogenesis of Koebner phenomenon

Area of Science:

• Dermatology
• Pathophysiology
• Immunology

Background:

• The Koebner phenomenon, or isomorphic reaction, involves secondary skin lesions mirroring primary ones after trauma.
• Common triggers include physical, chemical, and mechanical stimuli, as well as infections.
• Vitiligo, psoriasis, and lichen planus exemplify this phenomenon.

Purpose of the Study:

• To review the characteristics and pathogenesis of the Koebner phenomenon.
• To summarize current understanding of its triggers and mechanisms in specific dermatoses.
• To consolidate knowledge on immunological, oxidative, and mechanical factors involved.

Main Methods:

• Literature review of recent studies on Koebner phenomenon.
• Analysis of pathological mechanisms in vitiligo, psoriasis, and lichen planus.
• Synthesis of information on cellular signaling pathways and external stimuli.

Main Results:

• Vitiligo Koebnerization involves immune disorders, oxidative stress, and melanocyte issues.
• Psoriasis Koebner phenomenon is driven by inflammation and keratinocyte mechano-transduction.
• Lichen planus Koebnerization is linked to TRPA1, autoimmunity, and sun damage.

Conclusions:

• The Koebner phenomenon has diverse triggers and complex underlying mechanisms.
• Understanding these mechanisms is crucial for managing conditions like vitiligo, psoriasis, and lichen planus.
• Keratinocyte signaling and external stimuli play significant roles in its development.