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M9490450.TXT
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1994-09-19
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Document 0450
DOCN M9490450
TI Analysis of the cytolytic activity mediated by natural killer cells from
acquired immunodeficiency syndrome patients in response to
phytohemagglutinin or anti-CD16 monoclonal antibody.
DT 9411
AU Sirianni MC; Mezzaroma I; Aiuti F; Moretta A; Department of Allergy and
Clinical Immunology, University of Rome; La Sapienza, Italy.
SO Eur J Immunol. 1994 Aug;24(8):1874-8. Unique Identifier : AIDSLINE
MED/94333486
AB The aim of this study was to assess the cytolytic potential of natural
killer (NK) cells from human immunodeficiency virus type 1
(HIV-1)-infected patients, at different stages of the disease. Twenty
HIV-1 seronegative donors as well as sixty HIV-1 seropositive patients
were studied. Phytohemagglutinin and/or the anti-CD16 monoclonal
antibody Kd1 were used to redirect the peripheral blood lymphocyte lysis
of these patients to the 51Cr-labeled Fc gamma receptor-positive P815
murine mastocytoma target cell line. In parallel, NK cytotoxicity to
tumor targets was investigated. Seronegative as well as HIV-1 Center for
Disease Control (CDC) stage II patients showed maintained cytolytic
activity. The cytolytic potential declined with disease progression,
starting with CDC IVC2 patients, and was strongly diminished in acquired
immunodeficiency syndrome stage patients. This defect was accompanied by
decreased cytolytic activity to tumor targets and was not corrected by
the in vitro addition of interleukin-2. The number of cells bearing a
mature NK phenotype was normal in all the study groups. Our data suggest
that the impaired NK cytotoxicity to tumor targets described during the
progression of HIV-1 disease may be related to the progressive loss of
function of surface receptors involved in NK cell triggering.
DE Acquired Immunodeficiency Syndrome/*IMMUNOLOGY Antibodies, Monoclonal
Cells, Cultured Cytotoxicity, Immunologic/*IMMUNOLOGY Flow Cytometry
Human Immunophenotyping Interleukin-2/IMMUNOLOGY Killer Cells,
Natural/*IMMUNOLOGY Lymphocyte Transformation
Phytohemagglutinins/PHARMACOLOGY Receptors, IgG/*IMMUNOLOGY Support,
Non-U.S. Gov't Tumor Cells, Cultured/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).