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  • 1980-1984  (4)
  • 1975-1979
  • 1955-1959
  • Autotransfusion  (2)
  • Tumor promoter  (2)
  • 1
    ISSN: 1432-1335
    Keywords: Diterpene ; Tumorpromoter ; Plasminogen-Aktivator ; Blutplättchen-Aggregation ; Diterpene ; Tumor promoter ; Plasminogen activator ; Platelet aggregation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Phorbol and eight of its derivatives were investigated for their ability to stimulate the synthesis of the enzyme plasminogen activator in cultured chick embryo fibroblasts and to aggregate human blood platelets and have been assayed for tumor, promoting and skin, irritant activities. Over a range of concentrations, elevation in the levels of plasminogen activator activity induced by phorbol derivatives correlates well with their promoting and irritant properties. In the platelet aggregation assay however, the parallelism between the activities measured in different biological assays was less complete. While strong promoters, such as TPA, are potent aggregating agents, and weak promoters, such as PDA, are poor or ineffective inducers of aggregation, two derivatives, PDD and PDB, deviate from this general result. Platelets must be exposed to PDD in relatively high concentrations before they will aggregate, and PDB was found to be the most potent aggregating agent of all the derivatives tested.
    Notes: Zusammenfassung Phorbol und acht seiner Derivate wurden auf ihre Fähigkeit untersucht, die Synthese von Plasminogen-Aktivator in Zellkulturen von Hühnerembryo-Fibroblasten zu stimulieren und die Aggregation von Blutplättchen zu induzieren und auf ihre tumorpromovierende und hautirritierende Wirkung getestet. Die Erhöhung der Plasminogen-Aktivator Aktivität durch Phorbolderivate korreliert gut mit ihren irritierenden und promovierenden Eigenschaften. Im Test auf Blutplättchen-Aggregation ist die Korrelation nicht eindeutig: Sie gilt für starke Promotoren (wie TPA), die auch hochwirksame Induktoren der Aggregation sind, sowie für schwache Promotoren (wie PDA), die nur gering oder nicht induzieren; Ausnahmen sind PDD und PDB: PDD, ein starker Promoter, ist nur schwach wirksam, PDB, ein schwacher Promotor, ist dagegen das am stärksten aggregationsstimulierende Derivat.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 103 (1982), S. 17-29 
    ISSN: 1432-1335
    Keywords: Diterpene ; Tumor promoter ; Differentiation ; Leukemia cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 12-O-Tetradecanoylphorbol-13-acetate (TPA), the prototype polyfunctional diterpene ester tumor promoter of two-step carcinogenesis in mouse skin, induced differentiation of human promyelocytic leukemia cells (HL-60) in culture. Differentiation of HL-60 cells was characterized by increased phagocytosis, increased lysozyme activity (EC 3.2.1.17) in the growth medium, and changes in morphology to those characteristics of more mature cells resembling macrophages. Many of the cells treated with TPA became aggregated, attaching firmly to culture flasks. The average intracellular myeloperoxidase activity (EC 1.11.1.7) per cell decreased during induction of differentiation by TPA. It was also found that TPA enhanced, rather than inhibited, differentiation of HL-60 cells induced by DMSO. In addition to TPA, several polyfunctional diterpene esters of the tigliane, ingenane, and daphnane type have been tested for their ability to induce morphological and functional changes of HL-60 cells. The activities of the compounds to induce these changes correlated well with their activities as tumor promoters in two-step carcinogenesis in mouse skin. In particular, half the concentrations required for induction of adhesion of the cells to flasks were roughly correlated to the potency of these compounds as tumor promoters. Among the compounds tested, phorbol-12,13-didecanoate (PDD), ingenol-3-hexadecanoate, Pimelea factor P1 and Pimelea factor P2 were as active as TPA, while 4-O-methyl-TPA and 4α-PDD were much less active. Phorbol and ingenol were totally inactive up to a concentrations 10,000-fold higher than that of TPA.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 358 (1982), S. 556-556 
    ISSN: 1435-2451
    Keywords: Autotransfusion ; Range of use ; Results ; Autotransfusion ; Verwendungsmöglichkeiten ; Ergebnisse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An der Chirurgischen Universitätsklinik Köln wurde ein neues Autotransfusionssystem bei 14 Patienten 56mal eingesetzt (Solcotrans). Dieses System besteht aus einem Kunststoffbehälter, der über einen Luftschlauch mit einer Vacuumpumpe verbunden wird. Es können mit diesem Einmalgerät vom Chirurgen 500ml Blut aufgesaugt und durch den Anaesthesisten wieder reinfundiert werden. Das System wurde bei venösen Thrombektomien, Bauchaortenaneurysmen und in der Shuntchirurgie bei portaler Hypertension eingesetzt. Bei 9 Operationen konnte dadurch auf eine Fremdblutzugabe verzichtet werden.
    Notes: Summary At the surgical unit of the University of Cologne a new system for autotransfusion (Solcotrans) was used 56 times in 14 patients. This system consists of a plastic case that is connected with a vacuum pump by an air tube. After filling the plastic case with 30 ml of sodium citrate, 500 ml of blood can be aspirated by the surgeon and reinfused by the anaesthetist. The system was used in venous thrombectomy, aneurysm of the aorta abdominalis and in shunt surgery by portal hypertension. Because of this system donor blood was not used in nine operations.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 364 (1984), S. 525-525 
    ISSN: 1435-2451
    Keywords: Intraoperative autotransfusion ; Application ; Results ; Autotransfusion ; Anwendung ; Ergebnisse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An der Chirurgischen Universitäts-Klinik Köln-Lindenthal wurde ein neues System zur intraoperativen Autotransfusion bei 43 Patienten eingesetzt. Dieses System besteht aus einem stabilen Kunststoffbehälter, der einen flexiblen Kunststoffbeutel enthält. Nach Aspiration von 70 ml Natrium-Citrat-Lösung können bis zu 500 ml Blut aufgesaugt und durch den Anaesthesisten unter Druck reinfundiert werden. Bei 25 Operationen konnte dadurch auf eine Fremdblutgabe verzichtet werden. Das System eignet sich zum Einsatz in der Gefäß-, Abdominal- und Unfallchirurgie. Blutqualitätskontrollen wurden durchgeführt.
    Notes: Summary In the surgical unit of the University of Cologne a new system for intraoperative autotransfusion has been used in 43 patients. This system consists of a rigid plastic case with a plastic bag inside. After filling the plastic bag with 70 ml of natrium citrate solution, 500 ml of blood can be aspirated by the surgeon and reinfused under pressure by the anesthetist. Through this stored blood was not necessary in 25 operations, the set is well suited for intraoperative autotransfusion in vascular and abdominal surgery and in cases of trauma. Blood quality examinations were carried out.
    Type of Medium: Electronic Resource
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