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  • 1990-1994  (3)
  • Serratia marcescens  (2)
  • Anticancer agents  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Urological research 18 (1990), S. 299-303 
    ISSN: 1434-0879
    Keywords: MS pili ; Serratia marcescens ; Renal scarring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Renal scars are thought to be the end stage of chronic pyelonephritis and one of the most important causes of renal insufficiency and renal hypertension. The role of bacterial pili was examined in scar formation after an infection of newly constructed bacterial strains using the recombinant DNA technique, which possessed either mannose resistant (MR) or mannose sensitive (MS) pili of Serratia marcescens. Strains that differed in only a single virulence factor, namely, MR or MS pili, were used in a rat model of chronic pyelonephritis. In this model, MS-piliated bacteria stimulated renal scarring more severely than non-piliated or MR-piliated bacteria.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-0879
    Keywords: Chorioallantoic membrane ; Anticancer agents ; Hyperthermia ; thermo-chemotherapy ; Sensitivity test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The chorioallantoic membrane of chick embryos was used to examine the responses of three tumour cell lines to anticancer agents, alone and in combination with hyperthermia. Fifteen minutes of hyperthermia at 42.5°C produced the most favourable anticancer effect in the B 16-F 10 grafts. The use of Adriamycin (ADM) alone and the combined use of hyperthermia and either cisplatin (CDDP), cyclophosphamide (CY) or ADM resulted in a significantly higher rate of tumour regression in the B 16-F 10 grafts from a murine melanoma. In the KK-47 grafts derived from a transitional cell carcinoma of the bladder, the use of CY alone and the combination of CY and hyperthermia produced a significant tumour regression rate. In the T24 grafts neither the use of CY or CDDP alone, nor the combination of these drugs with hyperthermia demonstrated any significant effect. This method of screening anticancer agents was found to be rapid, simple to perform and inexpensive.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1434-0879
    Keywords: Pyelonephritis ; Renal scarring ; Pathogenesis ; Serratia marcescens ; Piliation ; Superoxide dismutase ; Leukocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The role of superoxide in scar formation following renal infection caused by mannose-sensitive (MS) piliated strains of bacteria was studied in the experimental pyelonephritis model using female Sprague-Dawley rats. The MS piliated strain stimulated renal scarring to a significantly greater extent than either the non-piliated or MR-piliated strain. Modulation of leukocytes by administering cyclophosphamide to induce neutropenia and colchicine to inhibit leukocyte migration was effective in preventing renal scarring. Treatment with superoxide dismutase during the early stage of infection was also effective in preventing scar formation. Finally, the production of superoxide by rat leukocytes was significantly larger following stimulation by MS piliated than either the nonpiliated or MR piliated strains. These observations suggest that superoxide released from leukocytes plays a critical role in the development of renal scarring following a bacterial infection, especially by MS piliated strains.
    Type of Medium: Electronic Resource
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