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J Clin Invest. Jan 1985; 75(1): 226–233.
PMCID: PMC423430
Evolution of recurrent herpes simplex lesions. An immunohistologic study.
A L Cunningham, R R Turner, A C Miller, M F Para, and T C Merigan
Abstract
We performed immunoperoxidase stains on skin biopsies taken from nine patients with recurrent peripheral herpes simplex lesions at 12 h to 6 d after onset of signs of symptoms to phenotype the inflammatory infiltrate, to detect cells producing interferons alpha and gamma, and to locate herpes simplex virus antigen-containing cells. Viral glycoprotein antigen was located in the nuclei and cytoplasm of necrotic epidermal cells, often within vesicles, in biopsies taken between the first and third day. Histologically, biopsies of all stages showed intradermal focal perivascular and diffuse mononuclear inflammatory infiltrates. The cells constituting the infiltrates were predominantly T lymphocytes with lesser numbers of histiocytes; Leu 7+ (most natural killer/killer) cells and B cells were rare in the biopsy specimens. Leu 3a+ ("helper") T lymphocytes predominated in both subepidermal and perivascular regions of early lesions (12-24 h). Tissue helper/suppressor ratios ranged from 6.3 to 3.4 compared with 1.9-1.0 in blood. In later lesions (after 2 d), monocytes/macrophages were more prominent in tissue sections and the helper/suppressor ratios (2.3-2.5) more nearly approximated those of blood (1.6-2.7). The negative correlation of tissue ratios with time was significant (P less than or equal to 0.02). A large proportion of the infiltrated T lymphocytes expressed DR antigens. There was also diffuse strong DR expression on epidermal cells in five cases (all of two or more days). In six biopsies, scattered macrophages and small cells, presumably lymphocytes, demonstrated cytoplasmic or membrane staining for a substance which copurifies with interferon gamma. We identified such stained cells within vessels, suggesting that these cells circulate. Gamma interferon might have an important role within the herpetic lesions, possibly inducing macrophage activation and cytotoxic T lymphocytes and increasing DR expression on monocyte and epidermal cells.
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