Anomalous expression of HLA class II molecules on keratinocytes and fibroblasts in hypertrophic scars consequent to thermal injury.
Immunoperoxidase staining of skin sections obtained from 11 hypertrophic scars, six normotrophic scars and three samples of normal skin were performed using anti-HLA monoclonal antibodies (HLA-DR, -DQ, class I), anti-interleukin-2 receptor (IL-2R) and anti-CD1. Sections from all hypertrophic scars showed an anomalous expression of HLA-DR molecules on keratinocytes and fibroblasts. Moreover hypertrophic scars were characterized by dense infiltrates of IL-2R-positive cells and by the presence of abundant Langerhans (CD1+) cells in the epidermis and dermis. These results support the hypothesis that immunologic mechanisms play an important role in hypertrophic scarring and point to an involvement of cell-mediated immune phenomena.
Department of Genetics, Biology and Medical Chemistry, Turin University, Italy.
C
C
Castagnoli
M
M
Stella
G
G
Magliacani
S T
ST
Alasia
P
P
Richiardi
D000293:Adolescent; D000328:Adult; D018949:Antigens, CD1; D000943:Antigens, Differentiation / Q000378:metabolism; D002056:Burns / Q000150:complications*; D002648:Child; D002921:Cicatrix / Q000209:etiology / Q000276:immunology* / Q000473:pathology; D005260:Female; D005347:Fibroblasts / Q000276:immunology; D006684:HLA-DR Antigens / Q000378:metabolism; D000949:Histocompatibility Antigens Class II / Q000378:metabolism*; D006801:Humans; D006984:Hypertrophy; D007111:Immunity, Cellular; D007124:Immunoenzyme Techniques; D015603:Keratinocytes / Q000276:immunology*; D007801:Langerhans Cells / Q000276:immunology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D015375:Receptors, Interleukin-2 / Q000378:metabolism
D018949:Antigens, CD1; D000943:Antigens, Differentiation; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D015375:Receptors, Interleukin-2