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Konjac Ceramide Induces Semaphorin 3A Expression via the MAPK/AP-1 Signaling Axis and RORα in Normal Human Epidermal Keratinocytes.

Biomolecules · 2026

Epidermal hyperinnervation is a major cause of intractable itch in barrier dysfunction conditions such as atopic dermatitis. Keratinocyte-derived semaphorin 3A (Sema3A) suppresses epidermal hyperinnervation, but its expression is markedly reduced in barrier-disrupted skin. Although konjac ceramide (kCer) has been reported to act as a Sema3A-like ligand, the mechanisms by which it regulates Sema3A… Read on PubMed →