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1994-10-01
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Document 0011
DOCN M94A0011
TI Langerhans' cells and lymphocytic infiltrate in AIDS-associated Kaposi's
sarcoma. An immunohistochemical study.
DT 9412
AU Valcuende-Cavero F; Febrer-Bosch MI; Castells-Rodellas A; Dermatology
Unit, Hospital Gran Via, Castellon, Spain.
SO Acta Derm Venereol. 1994 May;74(3):183-7. Unique Identifier : AIDSLINE
MED/94353823
AB The epidermal Langerhans' cells are dendritic cells of the skin capable
of triggering cutaneous immune responses. They possess the membrane
antigens required to this effect: class II histocompatibility antigen,
CD1a and CD4; the latter acts as receptor for the human immunodeficiency
virus. The skin is the organ primarily affected by Kaposi's sarcoma
(KS). In epidemic KS, the local immunologic conditions of the skin are
little known. We therefore studied 12 patients with AIDS-associated KS,
evaluating the density and phenotypic expression in KS-affected and
unaffected skin of the following antigens: CD1a, HLA-DR, CD4 in
dendritic epidermal cells and dermis, and CD3, CD4 and CD8 in cells of
the inflammatory infiltrate, using monoclonal antibodies applied to
frozen sections with the avidin-biotin-peroxidase technique. Langerhans'
cells in the AIDS-KS skin lesions were found to be decreased in number.
This decrease was even more pronounced in the case of cells expressing
HLA-DR antigen. A number of them were also revealed with CD4. The tumour
lymphocytic infiltrate was almost exclusively composed of CD3+ CD8+
phenotype lymphocytes. The dermis also revealed CD4+ dendritic cells.
The basal keratinocytes focally expressed HLA-DR. These phenotypical
alterations of the Langerhans' cells and the local immunological
imbalance observed may contribute to the growth and continuity of the KS
lesions.
DE Antigens, CD/ANALYSIS Antigens, CD3/ANALYSIS Antigens, CD4/ANALYSIS
Antigens, CD8/ANALYSIS AIDS-Related Complex/IMMUNOLOGY/*PATHOLOGY
Female Human HLA-DR Antigens/ANALYSIS Immunohistochemistry
Langerhans Cells/IMMUNOLOGY/*PATHOLOGY Lymphocytes,
Tumor-Infiltrating/IMMUNOLOGY/*PATHOLOGY Male Sarcoma,
Kaposi's/IMMUNOLOGY/*PATHOLOGY Skin Neoplasms/IMMUNOLOGY/*PATHOLOGY
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).