Induction of Suppression of Delayed Type Hypersensitivity to Herpes Simplex Virus by Epidermal Cells Exposed to UV-Irradiated Urocanic AcidIn Vivo
- 1 January 1987
- journal article
- research article
- Published by Mary Ann Liebert Inc in Viral Immunology
- Vol. 1 (3) , 191-198
- https://doi.org/10.1089/vim.1987.1.191
Abstract
Urocanic acid (UCA), the putative photoreceptor for ultraviolet radiation (UV)-induced suppression, undergoes a UV-dependent trans to cis isomerisation. Epidermal cells from mice painted with UCA, containing a known proportion of the cis-isomer, generate suppression of the delayed type hypersensitivity response to herpes simplex virus type 1 (HSV-1) when tranferred to naive syngeneic recipients at the same time and site as infection with HSV-1. One T suppressor cell subset, of phenotype (Thy1+, L3T4+, Ly2−), is induced by the cis-UCA modified epidermal cell transfer. Flow cytometric analysis of the epidermal cells from skin treated with UV or cis-UCA indicates an overall reduction from normal in the number of cells expressing MHC Class II antigens, but no alteration in the number expressing I-J antigens.Keywords
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