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  • 11
    ISSN: 1432-1440
    Keywords: Testicular neoplasms ; Stage IV ; Combination chemotherapy ; Prognosis ; Cross-resistance ; Testikuläre Tumoren ; Stadium IV ; kombinierte Chemotherapie ; Prognose ; Kreuzresistenz
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Vierundsiebzig Patienten mit pulmonal metastasierten nicht-seminomatösen Hodentumoren wurden im Rahmen einer prospektiven randomisierten Phase III-Studie sequentiell alternierend mit Velbe/Bleomycin und Adriamycin/Cisplatin behandelt. Unabhängig von der Randomisierung der initialen Zytostatika-Kombination wurden bei 71 auswertbaren Patienten bei einer Ansprechrate von 89% in 54% der Fälle Vollremissionen erzielt, die bei 35% der Patienten zwischen 2+ und 28+ Monaten mit einem Median von 12 Monaten andauerten. Durch zusätzliche operative Entfernung residueller pulmonaler Solitärmetastasen wurde die Vollremissionsrate auf 40/71 (56%) und die Anzahl der andauernden Vollremissionen auf 27/71 (38%) erhöht. Die Zwei-Jahres-Überlebensrate betrug nach der „Life-table“-Methode 63% bei den Patienten, bei denen eine Vollremission erreicht wurde, und war mit 29% bei den übrigen Patienten statistisch signifikant niedriger. Dreiundfünfzig Patienten (75%) waren bei einer mittleren Überlebenszeit von 9 Monaten zwischen 3 und 28 Monaten am Leben. Zusätzliche fortgeschrittene abdominelle Metastasierung, initial erhöhte β-HCG-und LDH-Werte und das Ausmaß der pulmonalen Metastasierung beeinflußten die Prognose statistisch signifikant negativ. Die Auswertung der einzelnen Chemotherapie-Kurse zeigte, daß beide Zytostatika-Kombinationen gleich wirksam waren. Dabei war jedoch ein Ansprechen auf Adriamycin/Cisplatin in 46% der Fälle nachweisbar, in denen Velbe/Bleomycin versagt hatte, während Velbe/Bleomycin nur bei 21% der Fälle wirksam war, in denen Adriamycin/Cisplatin zu keinem Ansprechen geführt hatte. Eine unterschiedlich ausgeprägte Kreuzresistenz zwischen den beiden Zytostatika-Kombinationen muß daher angenommen werden.
    Notes: Summary 74 patients with disseminated non-seminomatous testicular cancer were randomly entered on a prospective sequential combination chemotherapy regimen with mandatory crossover, consisting of either vinblastine/bleomycin or adriamycin/cis-dichlorodiammineplatinum (II) (DDP) as initial therapy. Independent of the randomization the overall remission rate in 71 evaluable patients was 89% including 54% complete remissions. 35% of the patients remained disease-free at 2+ to 28+ months with a median of 12 months. By additional surgical removal of residual pulmonary metastases in two patients the complete remission rate was increased to 40/71 (56%), and the number of patients with no evidence of disease to 27/71 (38%). According to the life-table method the two-years survival rates were 63% for complete responders and 29% for all other patients, which was significantly lower. 53 patients (75%) were alive at 3 to 28 months with a median of 9 months. Additional advanced abdominal disease, initially elevated β-HCG and LDH and extension of pulmonary disease were of significant negative influence on the prognosis. The evaluation of single chemotherapy courses revealed equal efficacy of both combinations. However, response to adriamycin/DDP occurred in 46% of the courses, when vinblastine/bleomycin had failed, while response to vinblastine/bleomycin occurred only in 21% of the courses when adriamycin/DDP had failed. Thus different patterns of cross-resistance between these alternative regimens may exist.
    Type of Medium: Electronic Resource
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  • 12
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Ascites cells derived from various transplantation tumours and leukemic lymphocytes have been employed to study the in-vitro effects of E. coli L-asparaginase on protein and nucleic acid biosynthesis. Bovine lymphocytes obtained from a cow suffering from chronic lymphatic leukemia showed a marked inhibition of14C-thymidine incorporation not reversible by L-asparagine and L-glutamine addition. With Walker ascites and Yoshida ascites of the rat, this effect has been found to be accompanied by a comparable inhibition of14C-leucine uptake, while in cells from mouse crocker ascites under the same conditions only14C-leucine incorporation was decreased. Although some specific investigations have been performed on nucleic acid biosynthesis in presence of L-asparaginase, the mechanisms of action — with respect to the rapid inhibition of14C-thymidine uptake into lymphatic cells — are still unknown.
    Notes: Zusammenfassung Die Wirkung von E. coli-L-Asparaginase auf die Nucleinsäure- und Proteinbiosynthese wurde an Zellsuspensionen lymphatischer Leukämiezellen und verschiedener Transplantationstumoren untersucht. Hierbei wurde beobachtet, daß dieses Enzym eine deutliche Senkung des14C-Thymidineinbaus an Leukämiezellen des Rindes hervorruft, ein Effekt, welcher durch Zusatz von L-Asparagin und L-Glutamin nicht aufhebbar war. Bei Zellen des Walker- und Yoshida-Ascitestumors der Ratte fanden sich eine Hemmung der14C-Thymidin- und14C-Leucininkorporation, während die L-Asparaginase bei Asciteszellen des Crocker-Sarkoms der Maus lediglich eine Senkung des14C-Leucineinbaus bewirkte. Die Ursache für das Verhalten des14C-Thymidineinbaus bei bestimmten Tumorzellen bleibt zunächst ungeklärt.
    Type of Medium: Electronic Resource
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  • 13
    ISSN: 0378-1119
    Keywords: DNA methyltransferase ; Recombinant DNA ; Staphylococcus aureus 3A ; plasmids ; restriction endonuclease ; sau3AIR and sau3AIM sequences
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    BBA Section Nucleic Acids And Protein Synthesis 179 (1969), S. 422-428 
    ISSN: 0005-2787
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 248 (1974), S. 673-675 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Studies in this laboratory have yielded highly specific ;j2P-labelling of nuclear and ribosomal high molecular weight RNA using a HEPES-buffered, phosphate-free medium5. FIG. 1 a, Sucrose density gradient centrifugation of nuclear RNA from acute myeloblastic leukaemia cells. The cells were ...
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Experimental Cell Research 100 (1976), S. 47-55 
    ISSN: 0014-4827
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 358 (1982), S. 91-94 
    ISSN: 1435-2451
    Keywords: Improved chemotherapy ; Median survival ; Verbesserte Chemotherapie ; Ansprechraten
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Im disseminierten Stadium des Magen-Carcinoms sind erste positive Resultate durch Kombinationen von Fluorouracil und Adriamycin entweder mit Mitomycin C oder einem Nitrosoharnstoffderivat erzielt worden. Die Ansprechraten liegen bei etwa 40 %, die mittlere Lebenserwartung von Patienten mit therapeutischem Ansprechen liegt bei über 12 Monaten. Bei Inoperabilität und nur regionaler Metastasierung sollten Bestrahlung und optimale Chemotherapie verbunden werden, bei Operabilität wird derzeit der Wert einer postoperativen Polychemotherapie geprüft.
    Notes: Summary Improved chemotherapeutic results have been obtained recently with combinations of 5-fluorouracil, adriamycin, and mitomycin or a nitrourea derivative. The response rates have been raised to 40%, and the median survival rate of responding patients has been increased to over 12 months. Regional disease should be treated by chemotherapy plus irradiation. Patients with curative resections are receiving adjuvant chemotherapy with improved regimens in various ongoing studies.
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 355 (1981), S. 147-151 
    ISSN: 1435-2451
    Keywords: Cyvadic ; Alternative regimens ; Adjuvant chemotherapy ; Cyvadic ; Alternative Chemotherapien ; Adjuvante Chemotherapie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 62, chemotherapeutisch nicht vorbehandelte Patienten mit metastasierten Weichteilsarkomen wurden mit dem Cyvadic-Schema behandelt. Komplette Remissionen wurden bei 10 %, komplette plus partielle Remissionen bei 20 % der Patienten erreicht. Die mittlere Dauer der kompletten Remission betrug 25, der partiellen Remission 2,5 Monate. Die mittlere Überlebenszeit der Patienten, die auf die Therapie ansprachen, lag bei 28 Monaten, bei den nicht-ansprechenden Patienten bei 14 Monaten. Die Chemotherapie mit Ifosfamid plus Cisplatin führte bei 50 % der Patienten mit primärer oder sekundärer Cyvadic-Resistenz zu Remissionen.
    Notes: Summary Sixty-two patients with metastatic soft tissue sarcomas of various histological types were treated with Cyvadic. No chemotherapy had been given previously. Complete remission (CR) was obtained in 10 % and complete plus partial remissions (PR) in 20 % of the patients. Mean duration of CR was 25 months, that of PR 2.5 months. Median survival time of r esponders was 28 months, that of nonresponders 14 months. Chemotherapy with a combination of ifosfamide plus cisplatin given to patients with primary or secondary resistance to Cyvadic led to CR + PR in 50 % of the patients.
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Cancer chemotherapy and pharmacology 18 (1986), S. S1 
    ISSN: 1432-0843
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Antitumor activity (increase in lifespan and cure) was greater for ifosfamide (IFO) in several experimental tumors, some of which were primarily resistant to cyclophosphamide (CYC). IFO has been shown to be active in anthracycline-resistant and in adriamycin/cisplatin-resistant sublines of an Ehrlich ascites tumor, as well as in tumor cells primarily resistant to CYC. The few comparative controlled clinical trials available suggest superior single-agent activity of IFO compared with CYC in soft tissue sarcoma and ovarian cancer. Combination chemotherapy with IFO has been effective in second-line treatment of sarcomas, malignant lymphomas, lung cancer, and testicular cancer, most of them pretreated with or refractory to CYC. Although it is difficult to obtain clinical proof that there is no cross-resistance between IFO and CYC, IFO has been shown to be active in multirefractory malignant lymphomas, in small cell lung cancer not responding to adriamycin, vincristine, and etoposide, and in soft tissue and bone sarcomas. Testicular cancer and pancreatic cancer are some of the tumors in which IFO activity is currently being evaluated and in which CYC has so far failed to show sufficient clinical activity. More comparative controlled clinical trials are needed in ovarian cancer, breast cancer, malignant lymphomas, sarcomas and cervical cancer, in which IFO has already shown sufficient single-agent activity. Due to its lower level of cross-resistance with a variety of heterocyclic products, but also with other alkylating agents, in addition to its use in induction chemotherapy, IFO is an important second-line agent in many clinical situations.
    Type of Medium: Electronic Resource
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  • 20
    ISSN: 1432-0843
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The combination of ifosfamide (IFO) and epirubicin (EPI) has been found to be an effective regimen in the treatment of metastatic tumours and shows remarkable activity in heavily pretreated breast cancer patients. A combination of EPI (35 mg/m2 on days 1 and 2) and IFO (1.8–2.5 g/m2 on days 1–5) was given to 58 patients with refractory breast cancer (n=23), metastatic sarcomas (n=15) and other solid tumours (n=20). Due to extensive prior therapy, the IFO dose had to be adapted to the individual haematological situation. In all, 55 patients were evaluable; we observed 5 complete (CRs) and 16 partial responses (PRs). In addition, 18 patients experienced a minor response (MR) or no change (NC). The median duration of all responses was 6.7 months. Toxicity was generally mild and closely related to previous therapy.
    Type of Medium: Electronic Resource
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