The antimicrobial peptide hBD2 promotes itch through Toll-like receptor 4 signaling in mice

The psoriasis biomarker hBD2 produces a robust scratching response in a TLR4-dependent manner in mice. TRPV1 is a downstream mediator of hBD2-induced itch. These findings suggest that hBD2 might act as an endogenous pruritogen in psoriatic itch.

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