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Updated: Aug 18, 2026

Rapid Genetic Analysis of Epithelial-Mesenchymal Signaling During Hair Regeneration
Published on: February 28, 2013
The psoriatic epidermal lesion and anagen hair growth may share the same "switch-on" mechanism
1Dermatopathology Laboratory, Yale University School of Medicine, New Haven, Connecticut.
Abstract:
Based on striking parallels between the cell kinetics in the epidermal lesion of psoriasis and the proliferation of hair matrix keratinocytes during the anagen phase of the hair growth cycle, the hypothesis is proposed that both phenomena may share the same "switch-on" mechanism. Particular emphasis is placed on a comparison between the Koebner phenomenon in psoriasis and wounding-induced anagen hair growth. In discussing alternative theoretical models for the proposed common "switch-on" mechanism, some useful experimental tools are suggested. Research into the mechanisms which control epithelial proliferation in psoriasis and hair growth may provide new insights into other growth processes, such as embryonic organogenesis and neoplasia, in which similar epithelial-mesenchymal interactions play a pivotal role.
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