title: Histiocytosis X--an immune deficiency disease? Studies on antibody-dependent monocyte-mediated cytotoxicity.
abstract: Six children with histiocytosis X, all in clinical remission, were investigated for antibody-dependent cytotoxicity mediated by monocytes and neutrophils. Monocytes demonstrated a reduced cytotoxicity and a normal Fc receptor activity. Judged by light microscopy the monocytes were normal. Preincubation with the patient's serum did not influence the cytotoxicity of normal monocytes. Neutrophils from patients with histiocytosis X showed a normal cytotoxic activity. We postulate a functional defect of the mononuclear phagocyte system in histiocytosis X.
mesh_terms: D000920:Antibody-Dependent Cell Cytotoxicity; D002648:Child; D002675:Child, Preschool; D005260:Female; D006646:Histiocytosis, Langerhans-Cell / Q000276:immunology*; D006801:Humans; D008297:Male; D009000:Monocytes / Q000276:immunology*; D009504:Neutrophils / Q000276:immunology; D012397:Rosette Formation