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Oral Mucosal Langerhans Cells Express DR and DQ Antigens
L.J. Walsh
Departments of Social and Preventive Dentistry, and Oral Biology and Oral Surgery
G.J. Seymour
Departments of Social and Preventive Dentistry, and Oral Biology and Oral Surgery
N.W. Savage
University of Queensland Dental School, Turbot Street, Brisbane, QLD 4000, Australia
The expression of the Class II antigens HLA-DR and HLA-DQ in human oral mucosa was examined in health and in the presence of inflammation. DQ antigens were detected on dendritic intra-epithelial cells which expressed the Langerhans cells (LC) phenotype T6+, DR+. In healthy gingiva, DR and DQ were co-expressed on Langerhans cells, whereas in an experimental gingivitis (day 8), more LC expressed DR than DQ. Absolute LC numbers were increased in inflammation. Traumatic ulceration of the buccal mucosa resulted in a decrease in the density of T6-, DR-, and DQ-positive cells. Re-population of migrating and regenerated epithelium was complete 10 days after ulcer induction. Disparity between DR and DQ expression was seen in both normal buccal mucosa and throughout the ulcer healing period. These results are in agreement with the reported sequence of Class II antigen expression on lymphoid cells.
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Journal of Dental Research, Vol. 65, No. 3,
390-393 (1986)
DOI: 10.1177/00220345860650030301

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