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  • Artikel: DFG Deutsche Nationallizenzen  (4)
  • Cryptococcus neoformans  (2)
  • Bones  (1)
  • Cyclosporine  (1)
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  • Artikel: DFG Deutsche Nationallizenzen  (4)
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Erscheinungszeitraum
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Mycopathologia 133 (1996), S. 139-142 
    ISSN: 1573-0832
    Schlagwort(e): Cryptococcus neoformans ; growth ; medium ; physiology ; thiamine ; vitamins
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The use of a simple synthetic medium is essential for study on the growth and physiology ofCryptococcus neoformans. In the present study, a minimal synthetic liquid medium (MSM) was tested for the growth of 23C. neoformans strains. This medium contained a low concentration of glucose, ammonium sulphate and inorganic salts with a pH value of 4.5, but no amino acids or vitamins. The strains were starved for 4 days to eliminate nutrients which might have been carried over from their pre-culture medium. Then, they were inoculated in the MSM at an initial OD of 0.020 at 550 nm and incubated at 37 °C for 20 days. Cell growth was generally monitored daily by measuring the absorbance at 550 nm. The medium supported the growth of the strains tested and gave an average final OD of 0.500. The results obtained indicate thatC. neoformans may be autotrophic with respect to vitamins and in particular to thiamine. The MSM medium is easy to prepare and store. It is highly reproducible and useful for studies on the growth and physiology ofC. neoformans.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Mycopathologia 136 (1996), S. 119-123 
    ISSN: 1573-0832
    Schlagwort(e): Cryptococcus neoformans ; phospolipase ; virulence ; AIDS
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Phospholipases have only been detected in a few fungi and yeasts, in particular in Candida albicans. Secreted phospholipases are considered by some researchers to be a potential factor of virulence and pathogenicity in C. albicans. Twenty-three Cryptococcus neoformans strains were tested in order to observe phospholipase production. Twenty-two of the 23 strains tested were able to produce phospholipases, and the ratio diameter of the colony to total diameter of the colony plus zone of precipitation (Pz) ranged between 0.271 and 0.949. C. neoformans, just like C. albicans, can be divided on the basis of the Pz into different strains according to their virulence and pathogenicity. There also appeared to be a correlation between the phospholipase production and the size of the capsule in the strains isolated from AIDS patients. For this reason, further studies on C. neoformans phospholipase activity would be useful in evaluating the virulence of different strains.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Mycopathologia 121 (1993), S. 65-75 
    ISSN: 1573-0832
    Schlagwort(e): Bones ; Candida albicans ; Experimental arthritis ; Radiography ; Rats
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Sprague-Dawley rats were inoculated intravenously (i.v.) withCandida albicans, and limb joints showing signs ofCandida-induced arthritis were subjected to radiographic and histologic examination. New bone formation and bone resorption were morbidly enhanced in bones sampled from the arthritic joints. Sparsely distributed needle-shaped calcified deposits began to be formed on bony surfaces in parallel with the onset of joint swelling. The calcified deposits gradually became denser and then covered the bony surfaces almost entirely, giving rise to an exostosis-like profile. In addition to the new bone formation, bone resorption was also observed in regions adjacent to the sites of new bone formation, and punched-out bone lesions were produced. Eventually, severe deformation of joint bones due to new bone formation and bone resorption was evident. Reflecting these unusual radiographic changes, abundant osteoblasts and osteoclasts were demonstrated histologically in the bones. On the basis of these results, possible mechanisms for the induction of arthritis byCandida infection are discussed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Clinical and experimental nephrology 4 (2000), S. 81-85 
    ISSN: 1437-7799
    Schlagwort(e): Key words Membranous nephropathy ; Nephrotic syndrome ; Cyclosporine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background. Recent studies suggested the possible benefits of cyclosporine (CsA) therapy in patients with membranous nephropathy, although most of these studies were short-term. An uncontrolled retrospective study was undertaken to evaluate the long-term effect of CsA therapy on idiopathic membranous nephropathy presented with refractory nephrotic syndrome. Methods. The subjects were eight patients with idiopathic membranous nephropathy presenting with refractory nephrotic syndrome. All patients had received a course of corticosteroid therapy before CsA therapy, and had not responded to the corticosteroid, including one or two administrations of intravenous methylprednisolone pulse therapy. The CsA doses were adjusted to maintain trough blood level at 100 ng/ml during the first 3 months and then reduced to maintain the level at 50 ng/ml in patients who had responded to partial remission. Results. CsA therapy induced a marked decrease in proteinuria from the first month, and a significant decrease from month 3 and thereafter. The mean serum total protein and albumin levels rose, and total cholesterol fell significantly with CsA therapy. The serum creatinine level was unchanged during CsA therapy. Three patients showed complete remission and two were in partial remission, while three were nephrotic at 12 months of CsA therapy. From 18 to 24 months of CsA therapy, three patients were in complete remission, four were in partial remission, and one patient was nephrotic. There were no side effects of CsA, except for gum hyperplasia and hypertrichosis in one patient. Conclusion. These results suggest that long-term CsA therapy at a low or moderate dose is potentially effective and safe in most nephrotic patients with idiopathic membranous nephropathy refractory to corticosteroid therapy.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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