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  • Adjuvant chemotherapy  (1)
  • DNA-synthesis  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 34 (1977), S. 471-478 
    ISSN: 1432-0584
    Keywords: Human transfer factor ; DNA-synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Human transfer factor was prepared from “buffy coat” of human donors by ultra filtration. These batches of transfer factor were tested for their ability to increase DNA-synthesis of antigen(mitogen) incubated lymphocytes. An increase of DNA-synthesis was measured by the ratio of appr. 2. Column Chromatographic separation of transfer factor on sephadex G-10 or DEAE cellulose columns showed an elution pattern with many peaks. In the lymphoblastogenese assay some peaks were found to be stimulatory, others in contrast inhibitory. It seems likely from our results that transfer factor represents a mixture of different chemical compounds with activating or inhibitory action on lymphoblastogenesis.
    Notes: Zusammenfassung Menschlicher Transferfaktor wurde aus Speckhaut menschlicher Leukozyten durch Ultrafiltration gewonnen und die Wirkung auf die Lymphoblastogenese in vitro untersucht. Dabei fand sich eine Steigerung der Antigen(Mitogen)-induzierten Blastentransformation um das 2fache. Fraktionierung der erhaltenen Transferfaktorpräparation auf Sephadex G-10 oder DEAE-Zellulose ergab durchwegs eine mehrgipfelige Kurve. Die Zugabe der einzelnen Subfraktionen von Transferfaktor zu Lymphozyten in vitro zusammen mit Antigen (Mitogen) führte bei einzelnen Fraktionen zu einer Hemmung, bei anderen zu einer Aktivierung der Lymphoblastogenese. Es kann daher angenommen werden, daß bei der Substanz Transferfaktor heterogene chemische Moleküle vorliegen, wobei einerseits aktivierende, andererseits auch hemmende Substanzen der Lymphoblastogenese als Gemisch vorliegen.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1335
    Keywords: Adjuvant chemotherapy ; Breast cancer ; Chemoresistance induction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This study tried to evaluate the impact of adjuvant chemotherapy on the induction of chemoresistance in radically operated upon breast cancer patients. Remission rate, remission duration and survival of a group of women (n=22) treated with combination chemotherapy (adriamycin and cyclophosphamide, AC) for recurrent breast cancer after failed adjuvant therapy (cyclophosphamide, methotrexate, fluorouracil, vinblastine) were retrospectively compared with the clinical data of non-pre-treated patients (n=28) receiving the same regimen (AC). The two groups of patients were comparable with regard to their risk factors. In the group of women with prior adjuvant chemotherapy only 3 out of 22 had a partial response, lasting 3, 8, and 16 months; the median survival was 50 months. In the group without prior adjuvant therapy 3 complete and 7 partial remissions with a median remission duration of 15.5 months (range 2–54 months) were found; the median survival was 104 months. The percentage of objective responses among the non-pre-treated patients at 36% was almost significantly higher than that of the pretreated women with 14% (p〈0.1). Responders to chemotherapy after relapse profited in terms of survival within the first 3 years after radical mastectomy, although no statistically significant difference was observed. The survival data shown assume a “shifting” of women from a group with better prognosis to a group with unfavourable prognosis following failed adjuvant chemotherapy.
    Type of Medium: Electronic Resource
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