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  • 1
    ISSN: 1432-1335
    Keywords: Autochthonous colonic tumors ; N-nitrosoacetoxymethyl-methylamine ; 1,2-Dimethylhydrazine ; 5-Fluorouracil ; Ftorafur ; CGP 6809 ; CGP 15'720A
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Colonic tumors were induced in male Sprague-Dawley rats by ten applications of 2 mg/kg/week N-nitrosoacetoxymethyl-methylamine (AMMN) or by three applications of 100 mg/kg/month 1,2-dimethylhydrazine (1,2-DMH). Application of AMMN and 1,2-DMH induced selective colonic tumors in 97% and 29–42% of the initial animals, respectively. Colonic-tumor-bearing animals were subjected to monotherapy with 5-fluorouracil, ftorafur, CGP 6809, and CGP 15'720A. No cures were achieved. The different therapies did not exert any clear influence on the survival time of animals, except for animals pretreated with AMMN and then subjected to ftorafur therapy.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-2451
    Keywords: Hyperthermia ; Induced colonic carcinoma ; Rat ; Chemotherapy ; BCNU ; Ftorafur
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Hyperthermie zur Behandlung von Tumoren wird seit längerem in In-vitro- und In-vivo-Versuchen und auch in der Klinik in verschiedenen Anwendungsformen erprobt. Bei der Kombination von Hyperthermie mit Chemotherapie wird eine überadditive cytostatische Wirkung beschrieben. In einem klinisch orientierten, kontrolliert durchgeführten Tierversuch wurde an einem durch N-Nitrosoacetoxymethylmethylamin (AMMN) induzierten autochthonen Coloncarcinom bei Sprague-Dawley-Ratten eine lokale, moderate Hyperthermie (43,5°C, 3 × 60 min) und eine Kombinationsbehandlung von Hyperthermie und Polychemotherapie (BCNU und Ftorafur) durchgeführt unter endoskopischer Diagnosestellung und Verlaufskontrolle. Es konnte keine Überlebenszeitverlängerung durch die angewendeten Therapien und keine additive Wirkung der lokalen moderaten Hyperthermie in Kombination mit der Chemotherapie bei diesem „harten”, d. h. relativ chemotherapieresistenten, Tumormodell gesehen werden.
    Notes: Summary The use of hyperthermia for the treatment of tumors has been tested in in vitro and in vivo experiments as well as clinically for a long time. Combination of hyperthermia with chemotherapy was reported to result in overadditive cytostatic effects. In a clinically adapted, controlled animal experiment, local moderate hyperthermia (43.5°C, 3 × 60 min) alone and in combination with polychemotherapy (BCNU and Ftorafur) was used for the treatment of AMMN-(N-nitrosoacetoxymethyl-methylamine) induced autochthonous colonic carcinomas in Sprague-Dawley rats. Diagnosis and follow-up inspections were carried out endoscopically. The applied therapies did not result in prolonged survival times, nor was an additive effect seen after combined hyperthermia and chemotherapy in this “hard”, i. e. relatively chemotherapy-resistent, tumor model.
    Type of Medium: Electronic Resource
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