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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 110 (1985), S. 11-16 
    ISSN: 1432-1335
    Keywords: Tumour growth ; Cell kinetics ; Melanoma ; Nude mice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A human malignant melanoma was grown in nude mice. The tumour showed an exponential growth for several weeks which gradually slowed down, until following week 8 the tumour growth ceased. The reasons for this growth pattern were examined by labelling techniques (PLM, LI). The tumour cell production as quantified by the growth fraction, showed only a moderate reduction which, taken alone, could not explain the growth cessation. The important mechanism seems to be an increased loss of tumour cells during the intermitotic interval. While the loss of cells/h remains constant the total intermitotic cell loss is increased because the cell cycle times are prolonged by 50% from the exponential phase (45 h in week 3) to the plateau phase (66 h in week 8).
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0584
    Keywords: Hodgkin's lymphoma ; Clinical trial ; Risk factors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a national multicentre trial in the FRG patients with Hodgkin's lymphoma in stages CS/PS III B/IV were entered into the HD 3 protocol and received induction chemotherapy with 3× (COPP+ABVD). Patients in complete remission (CR) received consolidation therapy by either radiotherapy (20 Gy IF) or chemotherapy (COPP+ABVD). Patients not in CR received salvage therapy (40 Gy in case of persisting nodal disease, else 4× CEVD chemotherapy). Between July 1983 and May 1987 230 untreated patients aged 15 to 60 qualified for this HD 3 protocol. This analysis is based on the first 137 patients evaluable for response. Of these, 86 (63%) achieved CR after induction chemotherapy. Including salvage therapy a total of 104 patients (76%) achieved CR. Univariate and multivariate prognostic risk factor analyses were performed using freedom from treatment failure (FFTF) as endpoint. Sex, age, splenectomy, bone marrow, liver and bone involvement had no prognostic impact nor had stage according to the Ann Arbor classification. In contrast, a pretreatment erythrocyte sedimentation rate (ESR) above 80 mm/h and a serum alkaline phosphatase (AP) above 230 IU/ml appeared as significant risk factors (p〈0.01, relative risk 2.3). The two parameters were not independent. Comparing a group A (ESR ≤ 80 and AP ≤ 230) versus a pooled group B (ESR〉80 and/or AP〉230) increased the difference (p〈0.001, relative risk of 2.8) which was also significant for survival (p〈0.04).
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Histochemistry and cell biology 93 (1989), S. 207-212 
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ehrlich ascites tumor cells were permeabilized using low concentrations of digitonin, 8 μg/106 cells. Permeabilization was monitored by the assay of lactate dehydrogenase released into the incubation medium and of hexokinase partially bound to mitochondria. Integrity of the cellular organelles was unaffected as determined by assay of the mitochondrial enzyme glutamate dehydrogenase. Cells were stained with rhodamine 123 as a mitochondrial specific dye and propidium iodide/mithramycin as DNA specific dyes. The green fluorescence of bound rhodamine 123 versus red fluorescence of DNA in individual cells was analysed by dual parameter flow cytometry. Incubation of cells with inhibitors of mitochondrial energy metabolism, such as, potassium cyanide and carbonyl cyanide m-chlorophenylhydrazone abolished binding of rhodamine 123. Flow cytometric data allowed a correlation between cell position in the mitotic cycle with total mitochondrial activity. In addition, comparison of the characteristics of propidium iodide and ethidium bromide staining further elucidated the molecular basis of the staining with the positively-charged fluorescent dye rhodamine 123.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 89 (1985), S. 409-421 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The title complexes were prepared from no-carrier-added99mTc−TcO 4 − and the air-sensitive reducing ligand DMPE under argon in ethanol-water. At acidic pH [Tc(III)Cl2 dmpe2]+ was formed, while alkaline pH led to the formation of [Tc(I)dmpe3]+. About 150°C and at least 10−3M DMPE was needed to achieve over 95% yield in less than 1 hour, otherwise the [Tc(V)O2dmpe2]+ intermediate was present. Electrophoresis demonstrated the unit positive charge and reversed-phase ion-pair HPLC provided separation and identification of99mTc-products by direct comparison with known99Tc-complexes. In rats the99mTc-complexes were excreted by kidneys and liver and reached high heart/blood but only low heart/lung and heart/liver ratios. In dogs satisfactory myocardial scintigrams were obtained in spite of high liver activity.
    Type of Medium: Electronic Resource
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