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  • 1
    ISSN: 1432-0584
    Keywords: Interleukin 2 ; Terminal transferase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Mononuclear blood cells from patients with different types of leukemia, and from controls as well as cells from established lymphoblastic cell lines were analyzed with respect to terminal transferase (TdT) activity and T-cell growth factor (TCGF; Interleukin 2, IL-2), to determine the significance of TCGF production and response as functional markers for human leukemias. The data obtained so far suggest that the aberrant proliferation and lack of maturation observed in these leukemias may be associated with or be the result of a break-down in cellular-mediated control of proliferation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cytotechnology 2 (1989), S. 269-286 
    ISSN: 1573-0778
    Keywords: hematopoiesis ; growth factor ; receptors ; modulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The formation of the cellular constituents of the blood is regulated by a series of endogenous polypeptides with largely paracrine function. A number of these hematopoietic growth factors (HGF's), which include colony stimulating factors, interleukins, and erythropoietin, have been purified to homogeneity and cloned, which in turn has led to extensive investigations of their biochemical properties and biological effects and functions. The HGF's act on target cells by binding to receptors. The kinetics and, to an even larger extent, dynamics of the factor/receptor associations display several intriguing characteristics, most of which are still poorly understood. Herein, the biochemical characteristics of HGF's receptors as well as the binding properties, post-receptor binding events and receptor modulation resulting from the association of HGF's and their target cells are reviewed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, N.Y. : Wiley-Blackwell
    Journal of Supramolecular Structure 13 (1980), S. 533-539 
    ISSN: 0091-7419
    Keywords: T lymphocytes ; TCGF ; continuous marrow cultures ; Life Sciences ; Molecular Cell Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: In the present study we investigated the presence of T-lymphocyte progenitors in the long-term murine bone marrow culture system described by Dexter: mature Thy-1 antigen-bearing T lymphocytes are lost in these cultures after a few days. By culturing nonadherent cells from such cultures in the presence of a supernatant of concanavalin A-stimulated spleen cells, a source of T-cell growth factor, we found that Thy-1 positive blast cells proliferated together with a second population of Thy-1 negative cells. These two populations of cells have been maintained in long-term in vitro cultures by passaging the cells in fresh conditioned medium at regular intervals. Moreover, we have been able to establish pure cultures of the Thy-1-bearing blast cells after separating them from the non-T cells using their adherence property to plastic surfaces. Long-term cultures of T lymphocytes can thus be established from long-term marrow cultures as well as from the spleen, thymus or fresh bone marrow.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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