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Previous work has shown that, following an intramuscular injection of ricin, the toxin becomes localized within histiocytes in the sinuses of lymph nodes draining the 'wound' site. When ricin labelled with colloidal gold was similarly injected, it was found within the same lymphoid cells as seen with native ricin. Biologically inert Indian ink apparently follows a similar fate, as demonstrated by the appearance of carbon particles within sinus histiocytes, as soon as 1 h after intramuscular injection. When the binding in vitro of Indian ink or ricin toxin to sections of lymph node was examined, ricin was seen to bind to the surfaces of the same sinusoidal cells and also, with a much lower frequency, to follicular lymphocytes, whereas Indian ink failed to bind. This indicated an interaction between ricin and cell membrane components. Moreover, this binding was inhibited markedly by the galactose-containing disaccharide, lactose, a target sugar specified by the lectin binding site of ricin and to a much lesser extent by the monosaccharide mannose. 相似文献
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S. Troupel G. Le Moel A. Bouten H. Fessi Z. Boukhalfa G. Stamatakis V. Lecon JP. Mery J. Agneray C. Jacobs 《Amino acids》1992,2(1-2):127-132
Summary A well preserved nutritional status is beneficial in chronically uremic patients for slowing the pace of deterioration of renal function, and delaying the need for dialysis therapy. The purpose of this study was to assess the nutritional profile of 10 patients in a steady state of advanced CRF, and of 15 patients with terminal renal failure immediately prior to their first hemodialysis session (J0), and 7, 14, 45, 60, days post start of dialysis. Patients were 18 to 65 years old with total plasma proteins 60g/1. Plasma concentrations of amino acids, nutrition proteins, apolipoproteins A1, and B were evaluated. Non inflammatory reaction was evaluated by determination of alpha-1-acid glycoprotein, and C reactive protein. The data (mean ± 1 SD) were compared with mean values of 15 healthy individuals. 相似文献
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