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Medisch Biologisch Laboratorium TNO (author), van der Drift, A.C.M. (author), van Noort, J.M. (author), Krüse, J. (author)Processing of most exogenous protein antigens involves restricted intracellular proteolysis to yield fragments that may be bound specifically by MHC class II glycoproteins. This association is required for functional presentation to antigen-specific T lymphocytes. The proteolytic degradation takes place in antigen-presenting cells, in an acidic,...article 1990
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Medisch Biologisch Laboratorium TNO (author), Gerritse, K. (author), Posno, M. (author), Schellekens, M.M. (author), Boersma, W.J.A. (author), Claassen, E. (author)Safe live vector systems are being developed for oral delivery of antigens. A transformation system for indigenous Lactobacillus species of the gastrointestinal tract is described. Model systems were set up to evaluate immune responses. Orally administered trinitrophenylized (TNP) Lactobacillus were examined for their ability to induce...article 1990
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Engesser, L. (author), Brommer, E.J.P. (author), Kluft, C. (author), Briet, E. (author), Gaubius Instituut TNO (author)Two hundred and three patients with venous thrombophilia were investigated in order to find out whether an elevated plasma concentration of plasminogen activator inhibitor (PAI) could be a cause of their tendency to thrombosis. The patients were studied in an asymptomatic period about 3 months after their last thromboembolic episode. PAI...article 1989
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Medisch Biologisch Laboratorium TNO (author), van Noort, J.M. (author), van der Drift, A.C.M. (author)The selectivity of cathepsin D, a mammalian intracellular aspartyl proteinase involved in the degradation of endocytosed proteins, was studied. For this purpose, several proteins of known primary structure were subjected to mild proteolysis by the enzyme, and the preferentially cleaved peptide bonds were identified. Comparison of the primary...article 1989
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Koppert, P.W. (author), Koopman, J. (author), Haverkate, F. (author), Nieuwenhuizen, W. (author), Gaubius instituut TNO (author)Balb/c mice were immunized with a mixture of fibrin degradation products (XDPs) prepared by complete lysis of a human bloot clot by tissue-type plasminogen activator and purified by immunoaffinity chromatography. Spleen cells of the mice were fused with P3 x 63 Ag 8653 myeloma cells. A clone (FDP 14) was selected that produces monoclonal...article 1986
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Instituut CIVO-Toxicologie en voeding TNO (author), Kuper, C.F. (author), Groeneveld, P.H.P. (author), Bloksma, N. (author)Chemicals/CAS: Acetylmuramyl-Alanyl-Isoglutamine, 53678-77-6; Acid Phosphatase, EC 3.1.3.2; Antigens, Surface; Antigens, Thy-1; carboxylesterase, EC 3.1.1.1; Carboxylic Ester Hydrolases, EC 3.1.1; Endotoxins; Immunoglobulins, Surface.article 1986
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Kluft, C. (author), Verheijen, J.H. (author), Jie, A.F.H. (author), Rijken, D.C. (author), Preston, F.E. (author), Sue-Ling, H.M. (author), Jespersen, J. (author), Aasen, A.O. (author), Gezondheidsorganisatie TNO Gaubius Instituut TNO (author)The plasma activity level of the recently discovered fast-acting inhibitor of tissue-type plasminogen activator (t-PA) was found to be temporarily increased after surgery, myocardial infarction and severe trauma. Detailed analysis of the postoperative period revealed simultaneously increased t-PA antigen and inhibition and decreased t-PA...article 1985
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Koppert, P.W. (author), Huijsmans, C.M.G. (author), Nieuwenhuizen, W. (author), Gaubius instituut TNO (author)Spleen cells of BALB/c mice, immunized with fragments Y of normal human fibrinogen, were fused with P3 x 63 Ag 8653 myeloma cells. A clone was found which produces monoclonal antibodies (Mab-Y18) of the IgM?? type. Mab-Y18 is immunoreactive with normal human fibrinogen, and its fragments X, Y, N-terminal disulphide knot, A??-chain, and A??...article 1985
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van Hinsbergh, V.W.M. (author), Bertina, R.M. (author), van Wijngaarden, A. (author), van Tilburg, N.H. (author), Emeis, J.J. (author), Haverkate, F. (author), Gaubius instituut TNO (author)Confluent cultures of endothelial cells from human umbilical cord were used to study the effect of activated human protein C (APC) on the production of plasminogen activators, plasminogen activator-inhibitor, and factor VIII-related antigen. Addition of APC to the cells in a serum-free medium did not affect the production of tissue-type...article 1985
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Brommer, E.J.P. (author), Leuven, J.A.G. (author), Barrett-Bergshoeff, M.M. (author), Schouten, J.A. (author), Gaubius instituut TNO (author)Impairment of fibrinolysis is supposed to contribute to CVD. In 38 hyperlipoproteinemic patients, known to be at risk for early CVD, fibrinolytic activity was measured before and after stimulation with DDAVP. A negative correlation was found between serum triglyceride levels and fibrinolytic activity, both before and after DDAVP. A subnormal...article 1982
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Stitz, L. (author), Kreeftenberg, J.G. (author), Loggen, H.G. (author), Balner, H. (author), Primatencentrum TNO (author)62 Rhesus monkeys were tested at different times after vaccinia virus infection for virus-specific induction of lymphocyte proliferation in vitro or antibody production in vivo. No association was found between identifiable RhLA-controlled antigens and the strength of the cellular proliferative and/or humoral response. Chemicals/CAS: Antibodies,...article 1981
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Creemers, P. (author), Radiobiologisch Instituut TNO (author)Sera from normal mice and mice bearing murine mammary tumor virus (MTV)-induced tumors showed cytotoxic reactions to the MTV-producing Mm5mt/cl cell line. The reaction could be blocked by the addition of MTV, but not of purified gp52 and p28. In sera from tumor bearers, cytotoxic responses ranged from 15 to 66%; reactivity was generally highest...article 1981
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Schuit, H.R.E. (author), Hijmans, W. (author), Instituut voor experimentele gerontologie TNO (author)The presence of surface-associated immunoglobulins and Fc receptors on mononuclear cells from normal human blood waas investigated by the direct immunofluorescence technique combined with phase-contrast microscopy. Formaldehyde-fixed cells were compared to unfixed cells and to cells preincubated at 37??C. In the unfixed samples a separate...article 1980
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Russell, J.L. (author), van den Engh, G.J. (author), Radiobiologisch Instituut TNO (author)Antisera directed against histocompatibility-2 antigens of the mouse suppress the formation of spleen colonies by pluripotent hemopoietic stem cells. Of antisera which are specific for subregions of the H-2 complex, only those which contain anti-H-2K or anti-H-2D activity are effective. Specific anti-Ia sera do not react with the stem cell. If...article 1979
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Kruisbeek, A.M. (author), Instituut voor experimentele gerontologie TNO (author)In the present review the results obtained so far with thymic epithelial culture supernatants (TES) or cocultivation of potential precursor T cells with TE cells will be discussed and compared with the effects reported for other thymic factors in studies on T cell differentiation in vitro. These studies can be divided into those involved with T...article 1979
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van Bekkum, D.W. (author), van den Engh, G.J. (author), Wagemaker, G. (author), Radiobiologisch Instituut TNO (author)A review is presented of the experiments that resulted in the identification of a specific morphologic entity representing the pluripotential hemopoietic stem cell (HSC) in mouse bone marrow. This entity was subsequently discovered in concentrated HSC preparations from bone marrow of rats, monkeys, and humans. In the mouse, a set of physical...article 1979
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Widmer, M.B. (author), Balner, H. (author), Primatencentrum TNO (author)Ten antisera containing antibodies directed against specificities controlled by the Ia1 locus of rhesus monkeys were tested for their ability to inhibit the MLC reaction. In cultures with responding cells from the serum producer, all sera with anti-Ia1, activity depressed the stimulatory capacity of cells carrying the Ia1 antigen in question. In...article 1978
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Widmer, M.B. (author), Balner, H. (author), Primatencentrum TNO (author)The genetic basis for MLC reactivity in rhesus monkeys was further investigated. Cells from an intra-RhLA recombinant monkey were MLC reactive with those of an SD-identical sib and with each of two sets of homozygous typing cells carrying either paternal haplotype. Also, cells from a pair of RhLA- identical sibs reacted in MLC with each other,...article 1978
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Brocades Zaalberg, O. (author), Fasbender, M.J. (author), Balner, H. (author), Medisch Biologisch Laboratorium TNO Primatencentrum TNO (author)In rhesus monkeys, alloantigens with Ia like characteristics also seem to be controlled by the major histocompatibility complex, RhL A (Balner and van Vreeswijk 1975). This paper reports immunocytological studies to distinguish those Ia like antigens from the conventional serologically defined RhL A antigens (SD), from β2 microglobulin, which is...article 1976