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Title: CD16+ NK lymphoproliferative disorders: cellular and molecular characterization. Author: Landay A, Gebel H, Levin S, Prasthofer E, Pistoia V, Downing J, Grossi C. Journal: Nat Immun Cell Growth Regul; 1987; 6(3):141-9. PubMed ID: 3114622. Abstract: We studied the mononuclear cells obtained from 2 patients with CD16+ lymphoproliferative disorders. In both subjects, over 80% of the circulating peripheral blood mononuclear cells were CD16+, CD2+, CD7+, CD3-, CD4-, and CD8-. In 1 patient, greater than 60% of the cells expressed HLA-DR and HLA-DQ gene products. Functional analysis of the natural killer (NK) cell activity of cells from this patient demonstrated 76% killing of K562 targets at ratios as low as 1:1 effector:targets. Karyotype analysis demonstrated a deletion on the long arm of chromosome 6, supporting the contention that the lymphocytosis in this patient was due to a clonally expanded population of cells. In additional studies, Southern blot analysis of DNA extracted from cells of this patient revealed that the beta-chain of the T cell receptor was of germ line configuration. This information supports the hypothesis that the clonally expanded NK population in this patient is of a lineage distinct from T cells and represents a true NK leukemia.[Abstract] [Full Text] [Related] [New Search]