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  • 1
    Electronic Resource
    Electronic Resource
    Etoposid (VP 16-213) (1981)
    Springer
    Journal of molecular medicine 59 (1981), S. 1177-1188 
    Details
    ISSN: 1432-1440
    Keywords: Etoposide ; Mechanisms of action ; Pharmacoclinetics ; Toxicity ; Clinical activity ; Cancer ; Etoposid ; Wirkungsmechanismus ; Pharmakokinetik ; Toxizität ; Klinische Aktivität ; Krebs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Etoposid ist ein halbsynthetisches Podophyllotoxinderivat mit einem breiten zytostatischen Wirkungsspektrum und relativ günstigem therapeutischen Index. Tierexperimentell zeigt diese Substanz einen Synergismus mitCis-Platin, Cyclophosphamid, BCNU und Cytosinarabinosid. Die Wirkmechanismen sind Hemmung des Nukleosidtransports in die Zelle, Störung der DNA- und RNA-Synthese, Einzelstrangbrüche, Störung der Proteinsynthese und Hemmung mikrotubulärer Proteine. In niedriger Konzentration wirkt Etoposid zellzyklusphasenspezifisch mit Akkumulation in der G2-Phase, in höherer Konzentration auch phasenunspezifisch. Am geeignetsten unter dem Aspekt von Wirkung und Toxizität ist die intravenöse oder orale Applikation in fraktionierten Dosen von 80–120 mg/m2 an 3–5 aufeinanderfolgenden Tagen und Wiederholung nach 21 [14–28] Tagen. Neben der dosislimitierenden Knochenmarkstoxizität sind weitere Nebenwirkungen Übelkeit, Erbrechen, Fieber, Kopfschmerz, Hypotension, Phlebitis, Mukositis, Neuropathie, Kardiotoxizität, Alopezie. Etoposid gehört zu den wirksamsten Substanzen beim kleinzelligen Bronchuskarzinom mit einer Ansprechrate von 37% (10% CR) und hat eine hohe Aktivität beim NHL (36%), Hodenkarzinom (37%), Chorion Karzinom der Frau (35%), beim Neuroblastom (29%) und bei der AMML (35%). Die Aktivität von Etoposid in Kombination mit anderen aktiven Substanzen bei diesen Tumoren wird in zur Zeit laufenden Studien untersucht; beim kleinzelligen Bronchuskarzinom sowie beim testikulären Karzinom und Non-Hodgkin-Lymphom wird Etoposid in Zukunft zu den Substanzen der ersten Wahl gehören können.
    Notes: Summary Etoposide is a semisynthetic podophyllotoxin derivative with a broad spectrum of antitumor activity and a relatively high therapeutic index. The synergism in animal withcis-platinum, cyclophosphamide, BCNU, and cytosinarabinoside is interesting for combination regimen. Mechanisms of action are inhibition of nucleoside transfer and of DNA and RNA synthesis, single stranded breaks, inhibition of protein synthesis and of microtubular assembly. While in lower concentrations etoposide is acting cell-cycle-dependent with accumulation of cells in the G2-phase it has, in high concentrations, also a cellcycle-phase-unspecific lethal effect. Most suitable is the oral and i.v. application of etoposide in fractionated doses of 80–120 mg/m2 on 3–5 consecutive days and repetition after 21 [14–28] days. Side effects are dose-limiting bone marrow toxicity, nausea, vomiting, fever, hypotension, phlebitis, mucositis, neuropathy, cardiotoxicity, alopecia. Etoposide is one of the most active single agents in small-cell bronchus carcinoma with a remission rate of 37% (10% CR), and is very active in NHL (36%), testicular carcinoma (37%), AMML (35%), choriocarcinoma (35%), and neuroblastoma (29%). The role of etoposide in combination with other active drugs in these tumors is currently investigated in bronchus and testicular carcinoma and NHL, where etoposide will belong to the drugs of the first choice in the future.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01721212
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  • 2
    Electronic Resource
    Electronic Resource
    Hematopoietic growth factors and treatment of testicular cancer: Biological interactions, routine use and dose-intensive chemotherapy (1996)
    Springer
    Annals of hematology 72 (1996), S. 1-9 
    Details
    ISSN: 1432-0584
    Keywords: Key words Testicular cancer ; Germ cell tumors ; Hematopoietic growth factors ; G-CSF ; GM-CSF ; Stem cell factor (SCF) ; Peripheral blood stem cells ; (PBSC) ; Dose-intensive chemotherapy ; Neutropenia ; Infection ; Human testicular cancer ; cell lines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  With the use of aggressive cis–platinum-based combination chemotherapy the majority of patients with metastatic testicular cancer will be cured. Hematopoietic growth factors (HGFs), particularly G- and GM-CSF, have been investigated for the treatment of testicular cancer in order to (a) ameliorate chemotherapy-induced myelosuppression, (b) increase the dose intensity of treatment, or (c) generate peripheral blood stem cells (PBSC) as hematopoietic support for mega-dose chemotherapy. Results from in vitro and animal models have excluded a significant influence of both factors, G-CSF and GM-CSF, on tumor growth and response to cytotoxic treatment. For the group of 'good-risk' patients with metastatic testicular cancer, 85–90% of whom will reach long-term survival, the incidence of granulocytopenic infections after standard chemotherapy regimens appears to be lower than 20%. The prophylactic use of HGFs for these patients is not routinely recommended but may be considered in case of an increased risk for infections. For 'poor risk' patients, who will achieve a 50% survival following standard chemotherapy, different attempts of treatment intensification have been investigated. The use of aggressive multidrug regimens is associated with granulocytopenic infections in 20–70% of patients. A randomized trial has demonstrated that the prophylactic use of G-CSF significantly reduces granulocytopenia, the number of septic infections, and the infection-related death rate. For 'poor-risk' patients the prophylactic use of HGFs, particularly G-CSF due to its favorable side effect profile, is recommended. The availability of G- and GM-CSF has made it possible to develop dose-intensified chemotherapy regimens. Demonstrated particularly for GM-CSF, a 1.5-fold dose increase can be achieved by the use of a myeloid growth factor alone, and thrombocytopenia and other organ toxicity will become dose limiting. Mobilization of PBSC, either after stimulation with HGFs alone or with HGFs, following chemotherapy has been successfully used in patients with testicular cancer. For the treatment of patients with relapsed disease PBSC support followed by HGFs has allowed the use of mega-dose therapy in multiple phase-II studies. This has prompted the investigation of high-dose therapy as first-line treatment for 'poor-risk' patients. In these patients sequential high-dose treatment with cis–platinum, etoposide, and ifosfamide for four consecutive cycles, each supported by G- or GM-CSF and PBSC, is currently being investigated by the German Testicular Cancer Study Group. HGFs have substantially reduced treatment-associated morbidity and mortality in patients receiving chemotherapy for testicular cancer. They make it possible for the first time to clinically explore the true value of dose-intensified chemotherapy regimens in testis cancer, serving as a model of a highly chemotherapy sensitive disease. Enrollment of patients in prospective clinical trials evaluating the role of high-dose therapy is strongly recommended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00663009
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Cisplatin/etoposide/ifosfamide stepwise dose escalation with concomitant granulocyte/macrophage-colony-stimulating factor for patients with far-advanced testicular carcinoma (1991)
    Springer
    Journal of cancer research and clinical oncology 117 (1991), S. S198 
    Details
    ISSN: 1432-1335
    Keywords: Testicular cancer ; GM-CSF ; Cisplatin ; Etoposide ; Ifosfamide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In order to develop a more dose-intensive induction regimen for the treatment of far-advanced testicular tumours, the German Cooperative Group for Testicular Tumours started a dose-escalation trial of cisplatin, etoposide and ifosfamide. At the first dose level 18 patients with advanced testicular cancer (Indiana University classification) received cisplatin 25 mg/m2, etoposide 120–150 mg/m2 and ifosfamide 1.2 g/m2 for 5 days every 3 weeks. Of these, 13 patients (72%) became tumour-free, 2 achieved a stable, marker-negative partial remission, 2 had progressive disease and 1 patient died ofClostridium sepsis. The main toxicity was myelosuppression with a white blood cell nadir of 900/μl and a thrombocyte nadir of 47000/μl. Granulocytopenic fever occurred in 43% of all cycles. At the second dose level 15 patients received cisplatin 30 mg/m2, etoposide 150 mg/m2 and ifosfamide 1.6 g/m2 five times every 3 weeks together with s.c. recombinant granulocyte/macrophage-colony-stimulating factor (GM-CSF) 10 μg/kg on days 6–15. Acute toxicity was severe with a white blood cell nadir of 300/μl and thrombocyte nadir of 11 000/μl. The duration of the thrombocytopenia increased with cycle number; 63% of all cycles were associated with granulocytopenic fever and in 83% platelet transfusions were required. One patient died from acute renal failure andAspergillus sepsis; 3 patients experienced adverse reactions to GM-CSF, requiring omission of this drugs in 2; 33% had grade 3 or 4 mucositis. At this dose level 8 patients (53%) became tumour-free, 4 patients (26%) had marker normalization with irresectable residual disease and 2 patients were treatment failures. Though acute toxicity was severe at this dose level, there was no unexpected or unmanageable organ toxicity and thus patients are now entered at dose level 3, which consists of cisplatin 30 mg/m2, etoposide 200 mg/m2 and ifosfamide 1.6 g/m2 for 5 days and GMCSF 10 μg kg−1 day−1 on days 6–15 s.c.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01613227
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    Paper (German National Licenses)
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