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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Ultraviolet light induces reactivation in a murine model of cutaneous herpes simplex virus-1 infection.

We have developed a model of cutaneous herpes simplex virus-1 (HSV-1) reactivation in SKH-1 hairless mice which closely mimics the condition in humans. Sixty plaque-forming units of HSV-1 strain 17 syn+ were applied to a superficially abraded area on the lateral body wall. More than 85% of mice developed primary HSV-1 infection characterized by a zosteriform pattern of cutaneous vesiculation and ulceration. Approximately one-third of mice with primary skin lesions succumbed to neurologic disease and in the remaining mice cutaneous lesions healed completely. Subsequent exposure of healed areas to two minimal inflammatory doses of UV resulted in recrudescence of skin lesions in the irradiated areas in almost 60% of mice. Lesions appeared approximately 4 days after irradiation, persisted for 3-5 days and then resolved completely. Reactivation rarely resulted in death due to neurologic disease. Primary lesions had a histologic appearance typical of cutaneous HSV-1 infection with vesicles and focal epithelial necrosis accompanied by the formation of epithelial syncytial cells and the presence of herpetic intranuclear inclusion bodies. In primary lesions HSV-1 was demonstrated by immunohistochemistry, polymerase chain reaction and culture. In reactivated lesions epithelial syncytia and inclusion bodies were not seen; however, virus was demonstrable by polymerase chain reaction and culture. Exposure of the uninfected side to UV did not stimulate disease recurrence suggesting that local effects of UV rather than systemic immunosuppression were responsible for reactivation. Reactivation could also be obtained with two minimal inflammatory doses of UV from a UV-340 light source which emits light approximating the solar spectrum.[1]


  1. Ultraviolet light induces reactivation in a murine model of cutaneous herpes simplex virus-1 infection. Goade, D.E., Nofchissey, R.A., Kusewitt, D.F., Hjelle, B., Kreisel, J., Moore, J., Lyons, C.R. Photochem. Photobiol. (2001) [Pubmed]
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