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Release of natural killer cytotoxic factor in patients with lymphoproliferative disease of granular lymphocytes. 1989

R Zambello, and L Trentin, and C Agostini, and T Chisesi, and M Vespignani, and G Pizzolo, and F Pandolfi, and F Ensoli, and G Semenzato
Department of Clinical Medicine, University of Padua, Italy.

To further investigate the mechanisms accounting for defective natural killer (NK) activity observed in the majority of patients with lymphoproliferative disease of granular lymphocytes (LDGL), we have studied the generation of natural killer cytotoxic factor (NKCF) from peripheral blood lymphocytes recovered from twelve LDGL patients. On the basis of their cytotoxic activity against the K-562 target cells, cases under study were separated in two groups. Cells from five patients, referred to as NK+, were found to exhibit high levels of NK-cell mediated cytotoxicity; cells from seven patients, referred to as NK-, despite their ability to bind to the K-562 targets, displayed a defective NK function. The coculture of cells from NK+ patients with NK sensitive K-562 cells triggered a significantly higher production of NKCF with respect to NK- patients (p less than 0.001 at 1:2 dilution). Using phytohemagglutinin (PHA) as the NKCF stimulator, differences between the groups were not significant, due to a recovery of NKCF generation in NK- patients. Furthermore, a consistent lectin (PHA) dependent cellular cytotoxicity (LDCC) was exhibited by both groups of patients. The addition of gamma-interferon (IFN-gamma) or interleukin-2 (IL-2) during NKCF generation did not significantly modify the production of this factor. Our data point out that (a) NKCF is involved in the lytic activity of LDGL patients' cells, (b) a constitutional impairment in the generation of NKCF is not present in NK- patients, since recovery of lytic function occurs after PHA stimulation, and (c) IL-2 and IFN-gamma do not play a relevant role in triggering NKCF production when added during the generation of this factor. These studies help to clarify the factors involved in the cytotoxic machinery of LDGL patients' cells, suggesting that the defect of the cytotoxic function observed in some LDGL patients could lie at the level of target recognition.

UI MeSH Term Description Entries
D007371 Interferon-gamma The major interferon produced by mitogenically or antigenically stimulated LYMPHOCYTES. It is structurally different from TYPE I INTERFERON and its major activity is immunoregulation. It has been implicated in the expression of CLASS II HISTOCOMPATIBILITY ANTIGENS in cells that do not normally produce them, leading to AUTOIMMUNE DISEASES. Interferon Type II,Interferon, Immune,gamma-Interferon,Interferon, gamma,Type II Interferon,Immune Interferon,Interferon, Type II
D007376 Interleukin-2 A soluble substance elaborated by antigen- or mitogen-stimulated T-LYMPHOCYTES which induces DNA synthesis in naive lymphocytes. IL-2,Lymphocyte Mitogenic Factor,T-Cell Growth Factor,TCGF,IL2,Interleukin II,Interleukine 2,RU 49637,RU-49637,Ro-23-6019,Ro-236019,T-Cell Stimulating Factor,Thymocyte Stimulating Factor,Interleukin 2,Mitogenic Factor, Lymphocyte,RU49637,Ro 23 6019,Ro 236019,Ro236019,T Cell Growth Factor,T Cell Stimulating Factor
D007694 Killer Cells, Natural Bone marrow-derived lymphocytes that possess cytotoxic properties, classically directed against transformed and virus-infected cells. Unlike T CELLS; and B CELLS; NK CELLS are not antigen specific. The cytotoxicity of natural killer cells is determined by the collective signaling of an array of inhibitory and stimulatory CELL SURFACE RECEPTORS. A subset of T-LYMPHOCYTES referred to as NATURAL KILLER T CELLS shares some of the properties of this cell type. NK Cells,Natural Killer Cells,Cell, NK,Cell, Natural Killer,Cells, NK,Cells, Natural Killer,Killer Cell, Natural,NK Cell,Natural Killer Cell
D008213 Lymphocyte Activation Morphologic alteration of small B LYMPHOCYTES or T LYMPHOCYTES in culture into large blast-like cells able to synthesize DNA and RNA and to divide mitotically. It is induced by INTERLEUKINS; MITOGENS such as PHYTOHEMAGGLUTININS, and by specific ANTIGENS. It may also occur in vivo as in GRAFT REJECTION. Blast Transformation,Blastogenesis,Lymphoblast Transformation,Lymphocyte Stimulation,Lymphocyte Transformation,Transformation, Blast,Transformation, Lymphoblast,Transformation, Lymphocyte,Activation, Lymphocyte,Stimulation, Lymphocyte
D008232 Lymphoproliferative Disorders Disorders characterized by proliferation of lymphoid tissue, general or unspecified. Duncan's Syndrome,X-Linked Lymphoproliferative Syndrome,Duncan Disease,Epstein-Barr Virus Infection, Familial Fatal,Epstein-Barr Virus-Induced Lymphoproliferative Disease In Males,Familial Fatal Epstein-Barr Infection,Immunodeficiency 5,Immunodeficiency, X-Linked Progressive Combined Variable,Lymphoproliferative Disease, X-Linked,Lymphoproliferative Syndrome, X-Linked, 1,Purtilo Syndrome,X-Linked Lymphoproliferative Disease,X-Linked Lymphoproliferative Disorder,Disease, Duncan,Disease, X-Linked Lymphoproliferative,Diseases, X-Linked Lymphoproliferative,Disorder, Lymphoproliferative,Disorder, X-Linked Lymphoproliferative,Disorders, Lymphoproliferative,Disorders, X-Linked Lymphoproliferative,Epstein Barr Virus Induced Lymphoproliferative Disease In Males,Epstein Barr Virus Infection, Familial Fatal,Familial Fatal Epstein Barr Infection,Immunodeficiency 5s,Immunodeficiency, X Linked Progressive Combined Variable,Lymphoproliferative Disease, X Linked,Lymphoproliferative Diseases, X-Linked,Lymphoproliferative Disorder,Lymphoproliferative Disorder, X-Linked,Lymphoproliferative Disorders, X-Linked,Lymphoproliferative Syndrome, X-Linked,Lymphoproliferative Syndromes, X-Linked,Purtilo Syndromes,Syndrome, Purtilo,Syndrome, X-Linked Lymphoproliferative,Syndromes, Purtilo,Syndromes, X-Linked Lymphoproliferative,X Linked Lymphoproliferative Disease,X Linked Lymphoproliferative Disorder,X Linked Lymphoproliferative Syndrome,X-Linked Lymphoproliferative Diseases,X-Linked Lymphoproliferative Disorders,X-Linked Lymphoproliferative Syndromes
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D010835 Phytohemagglutinins Mucoproteins isolated from the kidney bean (Phaseolus vulgaris); some of them are mitogenic to lymphocytes, others agglutinate all or certain types of erythrocytes or lymphocytes. They are used mainly in the study of immune mechanisms and in cell culture. Kidney Bean Lectin,Kidney Bean Lectins,Lectins, Kidney Bean,Phaseolus vulgaris Lectin,Phaseolus vulgaris Lectins,Phytohemagglutinin,Hemagglutinins, Plant,Lectin, Kidney Bean,Lectin, Phaseolus vulgaris,Lectins, Phaseolus vulgaris,Plant Hemagglutinins
D011506 Proteins Linear POLYPEPTIDES that are synthesized on RIBOSOMES and may be further modified, crosslinked, cleaved, or assembled into complex proteins with several subunits. The specific sequence of AMINO ACIDS determines the shape the polypeptide will take, during PROTEIN FOLDING, and the function of the protein. Gene Products, Protein,Gene Proteins,Protein,Protein Gene Products,Proteins, Gene
D011994 Recombinant Proteins Proteins prepared by recombinant DNA technology. Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA

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