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  • 1
    ISSN: 1432-0843
    Keywords: Key words Podophyllotoxin derivative ; Pharmacokinetics ; Pharmacodynamics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  NK 611 is a new podophyllotoxin derivative in which a dimethyl amino group replaces a hydroxyl group at the sugar moiety of etoposide. This results in profound physico-chemical differences: NK 611 is much less hydrophobic than etoposide. Preclinical studies have shown that NK 611 is advantageous in terms of bioavailability and of the potency of its anticancer activity. A clinical phase I study was performed in cancer patients within the framework of the AIO. Additionally, its pharmacokinetics and pharmacodynamics were investigated. NK 611 was given to 26 patients at doses ranging from 60 to 140 mg/m2 [maximum tolerated dose (MTD) 120 mg/m2] in a 30-min infusion. Plasma and urine samples were collected from 25 patients and analyzed using a validated high-performance liquid chromatography (HPLC) assay procedure. The concentration versus time curve of total NK 611 in plasma samples was best described by a three-compartment model. The overall median pharmacokinetic values were as follows (ranges are given in parantheses): mean residence time (MRT) 16.5 (5.4– 42.3)h, terminal half-life 14.0 (8.2–30.5)h, volume of distribution at steady state (Vss) 11.4 (7.9–18.1) l/m2, and plasma clearance (Clp) 15.1 (3.6–36.4) ml min-1 m -2. The total systemic drug exposure, represented by the area under the curve (AUC), varied between 53.4 and 532.0 μg ml-1 h. The mean AUC (±SD) increased with the dose from 78.7±3.7 μg ml-1 h at 60 mg/m2 up to 202.8±157.2 μg ml-1 h at 120 mg/m2. The mean urinary excretion (UE) fraction of unchanged drug at 48 h after the end of the infusion varied between 3.0% and 25.8% of the total dose delivered. Analysis of ultrafiltrate samples showed a protein binding of approx. 99%. The percentage reduction in white blood cells (WBC) and neutrophils (ANC) correlated with the dose, AUC, and AUCfree. The best relationship between the percentage of reduction in ANC and a pharmacokinetic parameter (AUC) took a nonlinear Hill-type form. The laboratory parameter for kidney or liver function did not correlate with the AUC. The variation of pharmacokinetic parameters within each dose level was profound. The reason for this pharmacological behavior remains unclear and should be investigated in further studies.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 4 (1998), S. 1019-1029 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Die Chemotherapie ist im multimodalen Behandlungskonzept des kleinzelligen Bronchialkarzinoms (SCLC) ein wesentlicher Faktor. Dieses wird beim Vergleich der Behandlungsergebnisse der 60er Jahre mit denen der aktuellen Standardtherapie deutlich. Mit der Chemotherapie lassen sich die mediane Überlebenszeit als auch das rezidivfreie Überleben signifikant verbessern. Zudem hat die Kenntnis prognostischer Faktoren zu einem differenzierten Umgang mit der Chemotherapie geführt, sodaß heute u.a. zwischen einer rein palliativen Therapie bei fortgeschrittener Tumorerkrankung und einer potentiell kurativen Therapie bei limitierter Erkrankung unterschieden werden kann. Die verschiedenen Möglichkeiten der Chemotherapie sind Gegenstand dieser Arbeit.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Der Onkologe 3 (1997), S. 375-379 
    ISSN: 1433-0415
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Die Lunge steht in der Metastasenentwicklung bei allen histologischen Tumortypen vor dem Skelett und nach der Leber an 2. Stelle [1]. Bei metastasierten Tumorleiden ohne bekannten Primärtumor (CUP) ist die Lunge bei 40% der Fälle mitbetroffen [2]. Als führende Metastasenmanifestation findet sie sich mit parenchymatösen Metastasen oder als Pleurakarzinose bei 10–30% der Patienten [3, 4]. Die Tumordissemination in die Lunge erfolgt vorrangig hämatogen und/oder lymphogen [5]. Charakteristischerweise siedeln sich 80–90% der Metastasen in den peripheren Lungenabschnitten oder subpleural an [6, 7]. Solitäre Infiltrate sind seltener als multiple Lungenmetastasen.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1569-8041
    Keywords: cisplatin ; etoposide ; gemcitabine ; non-small-cell lung cancer ; randomised phase II study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: This randomised study was designed to determine the responserate, survival and toxicity of single-agent gemcitabine andcisplatin–etoposide in chemo-naïve patients with locally advancedor metastatic non-small-cell lung cancer. Patients and methods: Gemcitabine 1,000 mg/m2 was given asa 30 min intravenous infusion on days 1, 8, 15 of a 28-day cycle, cisplatin100 mg/m2 on day 1, and etoposide 100 mg/m2on days 1 (following cisplatin), 2 and 3. Major eligibility criteria includedhistologically confirmed non-small-cell lung cancer, measurable disease,Zubrod PS 0–2; no prior chemotherapy, no prior radiation of the measuredlesion, and no CNS metastases. Results: 146 patients were enrolled, 71 patients on gemcitabine and 75patients on cisplatin–etoposide. Patient characteristics were wellmatched across both arms. Sixty-six gemcitabine patients and 72cisplatin–etoposidepatients were evaluable. Partial responses were seen in 12 gemcitabinepatients (18.2%; 95% CI: 9.8–30) and 11cisplatin–etoposide patients (15.3%; 95% CI:7.9–25.7).Early indications show no statistical differences between the two treatmentswith respect to time to disease progression or survival. Haematological andlaboratory toxicity were moderate and manageable. However, hospitalisationbecause of neutropenic fever was required for 6 (8%)cisplatin–etoposide patients but not for any gemcitabine patients.Non-haematological toxicity was more pronounced with significant differencesin nausea and vomiting (grade 3 and 4: 11% gemcitabine vs. 29%cisplatin–etoposide; despite the allowance for 5-HT-3antiemetics during the first cycle of cisplatin–etoposide), and alopecia(grade 3 and 4: 3% gemcitabine vs. 62%cisplatin–etoposide). Conclusions: In this randomised study, single-agent gemcitabine was atleast as active but better tolerated than the combinationcisplatin–etoposide.
    Type of Medium: Electronic Resource
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