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Ultraviolet-irradiated urocanic acid suppresses delayed-type hypersensitivity to herpes simplex virus in mice

Journal Article · · J. Invest. Dermatol.; (United States)
Ultraviolet radiation is known to induce a transient defect in epidermal antigen presentation which leads to the generation of antigen-specific suppression of the delayed-type hypersensitivity (DTH) response. The putative receptor in skin for the primary event in UV-suppression is urocanic acid (UCA) which may then interact locally, or systemically, with antigen presenting cells or initiate a cascade of events resulting in suppression. We present the first direct evidence that UCA, when irradiated with a dose (96 mJ/cm2) of UVB radiation known to suppress the DTH response to herpes simplex virus, type 1 (HSV-1) in mice, can induce suppression following epidermal application or s.c. injection of the irradiated substance. This suppression is transferable with nylon wool-passed spleen cells.
Research Organization:
Univ. of Edinburgh Medical School, Scotland
OSTI ID:
7133120
Journal Information:
J. Invest. Dermatol.; (United States), Journal Name: J. Invest. Dermatol.; (United States) Vol. 5; ISSN JIDEA
Country of Publication:
United States
Language:
English