Surfactant-induced chronic pruritus: Role of L-histidine decarboxylase expression and histamine production in epidermis.

Abstract	Shampoo and cleansers containing anionic surfactants including sodium dodecyl sulphate (SDS) often cause pruritus in humans. Daily application of 1-10% SDS for 4 days induced hind-paw scratching (an itch-related behaviour) in a concentration-dependent manner, and 10% SDS also caused dermatitis, skin dryness, barrier disruption, and an increase in skin surface pH in mice. SDS-induced scratching was inhibited by the opioid receptor antagonist naloxone and the H histamine receptor antagonist terfenadine. Mast-cell deficiency did not inhibit SDS-induced scratching, although it almost completely depleted histamine in the dermis. Treatment with SDS increased the histamine content of the epidermis, but not that of the dermis. SDS treatment increased the gene expression and post-translation processing of L-histidine decarboxylase in the epidermis. The present results suggest that repeated application of SDS induces itch through increased production of epidermal histamine, which results from an increase in the gene expression and post-translation processing of L-histidine decarboxylase.
Authors	Yoshihiro Inami, Atsushi Sasaki, Tsugunobu Andoh, Yasushi Kuraishi
Journal	Acta dermato-venereologica (Acta Derm Venereol) Vol. 94 Issue 6 Pg. 645-50 (Nov 2014) ISSN: 1651-2057 [Electronic] Sweden
PMID	24603881 (Publication Type: Journal Article)
Chemical References	Histamine H1 Antagonists Narcotic Antagonists Surface-Active Agents Sodium Dodecyl Sulfate sarkosyl Histamine Histidine Decarboxylase Sarcosine
Topics	Animals Behavior, Animal (drug effects) Disease Models, Animal Enzyme Induction Epidermis (enzymology) Histamine (metabolism) Histamine H1 Antagonists (pharmacology) Histidine Decarboxylase (biosynthesis, genetics) Male Mast Cells (enzymology) Mice, Inbred ICR Narcotic Antagonists (pharmacology) Protein Processing, Post-Translational Pruritus (chemically induced, enzymology, genetics, prevention & control, psychology) Sarcosine (analogs & derivatives) Signal Transduction Sodium Dodecyl Sulfate Surface-Active Agents Time Factors Up-Regulation

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