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  • 1990-1994  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Epirubicin and ifosfamide in patients with refractory breast cancer and other metastatic solid tumours (1990)
    Springer
    Cancer chemotherapy and pharmacology 26 (1990), S. S69 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF00685425
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Cytotoxicity of adriamycin, idarubicin, and vincristine in acute myeloid leukemia: Chemosensitization by verapamil in relation to P-glycoprotein expression (1992)
    Springer
    Annals of hematology 65 (1992), S. 206-212 
    Details
    ISSN: 1432-0584
    Keywords: P-glycoprotein ; Drug resistance ; MTT assay ; Acute myeloid leukemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 4-day colorimetric tetrazolium dye (MTT) assay was used to assess the cytotoxicity of adriamycin (ADM), vincristine (VCR), and idarubicin (IDA) in blasts isolated from 37 patients with newly diagnosed and pretreated acute myeloid leukemia (AML). The effect of verapamil (VRP) as a chemosensitizer was studied in relation to the expression of the membrane efflux pump P-glycoprotein (PGP) as determined by a semiquantitative flow-cytometric procedure. A slight positive correlation was found between the fraction of cells expressing PGP and the ID50 values for ADM and VCR, but not between cellular PGP content and sensitivity to IDA. The overall data showed no significant sensitization effect of VRP. However, in specimens with more than 10% cells expressing PGP, 2μM VRP sensitized cells to ADM and VCR significantly. The median of sensitization ratios (SRs), i.e., the ratios of cytotoxic drug ID50 in the absence/presence of VRP, were 1.89 and 2.0, respectively. No sensitizing effect of VRP on the cytotoxicity of IDA was observed. Related to the clinical status, the median fraction of PGP-positive blasts was elevated fourfold in pretreated patients (n=16) in comparison to patients with de novo AML (n=19). No differences in ID50 values were observed between newly diagnosed and pretreated patients. However, SRs for ADM and VCR were higher in samples of pretreated patients compared with de novo AML. PGP-mediated cellular drug resistance may thus be circumvented in leukemic blasts by application of chemosensitizers or, potentially, alternative anthracyclines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01703946
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Relation between leukocyte counts and cortisol secretion in CML patients undergoing combined TNF α/IFN α therapy (1992)
    Springer
    Annals of hematology 65 (1992), S. 116-120 
    Details
    ISSN: 1432-0584
    Keywords: TNF α ; IFN α-2b ; Leukocytes ; Cortisol ; ACTH ; CML
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary During long-term interferon α-2b (IFN) therapy of Philadelphia chromosome-positive chronic myelogenous leukemia (CML) patients, short-term effects of tumor necrosis factor α (TNF) on peripheral leukocyte counts, as well as cortisol and corticotropin (ACTH) release were studied. TNF (40–160μg/m2) was given as a 2-h infusion on 5 consecutive days every 3 weeks, in addition to s.c. daily IFN injections (4 mio U/m2), to four (two male/two female) patients, who had been treated for more than 8 months with IFN and additionally for 0–7 months with TNF. Leukocyte counts, cortisol, and ACTH were determined at 30-min intervals between 4 p.m. and midnight. Profiles were determined the day before and on day 1 of TNF therapy. Leukocyte numbers decreased 30 min after start of TNF administration and increased 30–60 min later with a rebound until the next TNF application. The increase of leukocyte counts was due mostly to neutrophil granulocytes. ACTH levels increased 30 min, cortisol 60 min, and leukocyte counts 90 min after start of TNF infusion. Metopirone, an inhibitor of cortisol synthesis given to one patient, suppressed the TNF-induced stimulation of cortisol secretion and subsequent increase of leukocyte counts, while ACTH blood levels were enhanced. It was concluded that leukocyte count increases after TNF/IFN administration might be related to TNF-evoked cortisol secretion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01695809
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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