Abstract
To study the influence of experimental infection with simian retrovirus-1 and simian immunodeficiency virus on the number and distribution of Langerhans cells in oral mucosa of rhesus monkeys, 10 monkeys were intravenously inoculated with simian retrovirus-1, 7 with simian immunodeficiency virus, and 2 were mock-inoculated. Biopsies were taken from gingiva and cheek pouch before infection and at 1 (simian immunodeficiency virus group only), 4, and 7 months after infection. Langerhans cells were detected in frozen sections by immunohistochemistry with monoclonal antibodies Leu-6 and HLA-DR. The mean number of Langerhans cells per surface millimeter and square millimeter of epithelium was calculated under blind conditions. The results showed no statistically significant differences in the number or distribution of Langerhans cells in the three groups at the various time points of examination. Similarly, no differences were detected within any group over the observation period. Thus systemic infection of rhesus monkeys with either simian retrovirus-1 or simian immunodeficiency virus does not lead to a significant change in the number of Langerhans cells in oral mucosal epithelium.
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