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Previous Volume 310:1279-1282 May 17, 1984 Number 20 Next

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Abstract

We investigated the possible role of a defect in antigen-presenting cells in the acquired immunodeficiency syndrome (AIDS), by enumeration of Langerhans' cells, the epidermal antigen-presenting cells. These cells were stained for the characteristic markers, surface Ia antigen and surface ATPase activity. A significant reduction was observed in the number of stained cells per square millimeter of body-surface area in 24 patients with AIDS and either opportunistic infections (Ia, 258 +/- 34, and ATPase, 274 +/- 46) or Kaposi's sarcoma (Ia, 378 +/- 100, and ATPase, 530 +/- 26), as compared with 38 appropriate controls (Ia, 721 +/- 13, and ATPase, 693 +/- 12). Examination of six patients with an "AIDS-related complex" revealed significantly reduced numbers of Langerhans' cells per square millimeter; this reduction was more pronounced in staining for Ia antigen (306 +/- 69) than in staining for ATPase activity (517 +/- 101). Given the known role of Ia expression in antigen presentation, we suggest that functional alterations in Langerhans' cells, and perhaps also in antigen-presenting cells in tissues other than skin, may be involved in the pathogenesis of AIDS.

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