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  • 11
    ISSN: 1432-0584
    Keywords: Key words Interleukin-2 ; Acute myeloid leukemia ; Leukocytoclastic vasculitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Interleukin-2 (IL-2) has been licensed for the treatment of renal cell carcinoma and is currently being evaluated as a therapeutic agent in hematological malignancies. It is associated with a variety of side effects due to induction of a nonspecific inflammatory response. However, phenomena of autoimmunity have also been reported. Here we describe a patient with secondary acute myeloid leukemia who developed a leukocytoclastic vasculitis during long-term post-remission treatment with very low doses of IL-2.
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 57 (1988), S. 316-316 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 58 (1989), S. 173-179 
    ISSN: 1432-0584
    Keywords: Hematopoietic growth factors ; Clinical application
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Colony-stimulating factors (CSFs) have entered the clinical arena. Several investigators have explored, in first clinical phase I studies, different routes of administration to define the optimum biological dose, maximum tolerated dose, toxicity, and pharmacokinetics of these reagents. It has been demonstrated that recombinant human (rh) granulocyte-macrophage CSF (GM-CSF) and granulocyte CSF (G-CSF) can be safely administered over a broad dose range to increase number of circulating granulocytes in man. More recently, GM-CSF and G-CSF have been involved in phase Ib/II studies to assess the granulopoietic responses of patients with granulocytopenia due to various underlying disease states including myelodysplastic syndrome, aplastic anemia, cyclic neutropenia, Kostmann's syndrome, and the acquired immuno-deficiency syndrome. Both factors were also investigated with respect to their potential to prevent chemotherapy induced granulocytopenia or to accelerate recovery from that condition. The short-term effects of rh GM-CSF after autologous bone marrow transplantation for various solid tumors and lymphoid malignancies were assessed as well. In this article we will focus on recent results that have emerged from in vivo studies utilizing CSFs.
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 59 (1989), S. 375-384 
    ISSN: 1432-0584
    Keywords: Lymphokine activated killer cells ; Interleukin-2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Various subpopulations of human leukocytes may be induced by lymphokines to exert cytotoxic activity. In man major histocompatibility complex non-restricted tumor cell lysis by interleukin-2 (IL-2) induced peripheral blood lymphocytes is attributed mainly to natural killer cells. These T cell receptor negative large granular lymphocytes are called lymphokine activated killer (LAK) cells. In order to explore the potential of LAK cells in tumor therapy, several clinical studies have been conducted, using IL-2 alone or in combination with ex vivo IL-2-activated peripheral blood lymphocytes. Objective responses have reproducibly been achieved only in renal cell carcinoma and malignant melanoma and were associated with considerable toxicity. In view of restricted efficacy and increasing doubts as to whether LAK cells indeed account for the in vivo observed responses, more recent strategies focus on tumor antigen specific cytotoxic T cells or tumor infiltrating lymphocytes. Successful translation of this approach into clinical practice, however, may be dependend on some basic problems of tumor immunology to be solved which were thought to be by-passed by the LAK cell approach.
    Type of Medium: Electronic Resource
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  • 15
    ISSN: 1432-1440
    Keywords: Key words Gene Therapy ; Vaccination ; Melanoma ; Cytotoxic T lymphocytes ; Tumor-infiltrating lymphocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  In a phase I trial designed to study a vaccine composed of autologous tumor cells and interleukin-2 gene transfected fibroblasts we analyzed lymphocytes infiltrating the vaccination site (VIL) in two melanoma patients. Functional studies demonstrated that numbers of MHC class I restricted cytotoxic T cells directed against the autologous tumor had increased at the immunization site in both cases. Analysis of the variability of T cell receptors (TCR) in the VIL of one patient revealed that the cytotoxic T lymphocytes consisted of a predominant population of TCRBV21S3+ T cells. Enrichment of this subpopulation to more than 99% by specific anti-TCRBV21S3 monoclonal antibody linked immunomagnetic beads and sequencing of the TCR-β chain disclosed exactly the same V-D-J junctional sequence in all eight TCRBV21 transcripts from these VIL. The identical sequence was also detected in all eight TCRBV21 transcripts from the patient’s tumor-infiltrating lymphocytes, indicating that the same CTL clone had infiltrated the tumor, circulated in the peripheral blood, and was amplified at the vaccination site. The TCRBV21S3+ T cells were also found to display an MHC class I restricted cytotoxic activity specifically directed against the autologous tumor cells. At the beginning of treatment these cells were undetectable at the vaccination site and delayed-type hypersensitivity testing was negative, contrasting with the positive results after therapy. Thus it is likely that vaccination with autologous tumor cells plus interleukin-2 gene transfected allogeneic fibroblasts had induced not only local accumulation but also an increase in the frequency of circulating tumor specific CTL.
    Type of Medium: Electronic Resource
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  • 16
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 17
    ISSN: 1432-1440
    Keywords: Key words Plasmid vector ; Lipofection ; Transgene expression ; Gene therapy ; Nontranscribed Spacer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  We evaluated the survival, transgene production, and copy numbers of integrated plasmid units per host genome after lipofection with mono- and bicistronic plasmid vectors in different cell lines and under various conditions. The addition of an integration enhancing murine sequence nontranscribed spacer (NTS) to the plasmids increased transfection efficiency, survival, and transgene expression. However, in human fibroblast cells this sequence had only marginal effects on overall plasmid copy number in bulk cultures. Clones producing the highest amounts of the transgene contained only one or two copies of plasmid per genome, independent of cell type and plasmid design.
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Springer
    Der Internist 38 (1997), S. 1070-1073 
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Gentherapie ; Malignome ; Gentherapie ; Tumortherapie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zum Thema In dieser Arbeit wird über molekularbiologische Methoden referiert, mittels derer Malignomzellen in ihrem Genom derart verändert werden, daß sie – vereinfacht gesagt – entweder zugrunde gehen oder wenigstens therapeutischen Maßnahmen besser zugänglich werden. Auf diesem faszinierenden Forschungsgebiet wurden in den letzten Jahren ermutigende Fortschritte erzielt. Ob sich daraus wirklich eine neue Therapieoption für Malignome ergibt, ist derzeit allerdings noch offen. Die bisher erarbeiteten wichtigsten methodischen Ansätze sind hier dargestellt. Nur die klinische Prüfung kann erweisen, ob sich mit gentherapeutischen gegenüber anderen etablierten Verfahren bessere Therapieergebnisse erzielen lassen. Möglicherweise könnten mittels Gentherapie Nachteile konventioneller Verfahren mit ihrer letztlich unzureichenden spezifischen Wirkung auf maligne Zellen überwunden werden.
    Type of Medium: Electronic Resource
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  • 19
    Electronic Resource
    Electronic Resource
    Springer
    Mycorrhiza 2 (1993), S. 167-173 
    ISSN: 1432-1890
    Keywords: Bacillus mycoides ; Accelerated formation ; Sporulation ; Triadimefon ; Pyrazophos
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Stimulation of vesicular-arbuscular (VA) mycorrhizal fungi may secure the early establishment of symbiosis and benefit the host plant at an earlier stage of development. The application of Bacillus mycoides resulted in particular in the acceleration of early VA mycorrhiza formation. An increase in vigour of the symbiosis could be measured later in terms of increased sporulation of the mycorrhizal fungi after shoot removal. Natural sporulation during later mycorrhizal development was affected by combination of bacteria and just one mycorrhizal isolate. The stimulation of mycorrhizal development was shown to be non-specific with regard to host plant and the isolate of the VAM fungus. However, the effect could not be achieved in all combinations of soil types and host plants. Application of the systemic fungicides triadimefon and pyrazophos promoted VAM formation. Combinations of fungicide and bacterial treatments were not synergistic.
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Biotherapy 2 (1990), S. 315-324 
    ISSN: 1573-8280
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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