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  • 1
    Electronic Resource
    Electronic Resource
    Molecular and cellular biochemistry 84 (1988), S. 239-243 
    ISSN: 1573-4919
    Keywords: Mononuclear cells ; myeloid colony ; plating efficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Mononuclear cells, harvested from fresh human bone marrow specimens by density gradient separation, were suspended in phosphate buffered saline and analyzed by flow cytometry in terms of the forward and right angle scattering of the incident light. The rectilinear distribution, obtained by plotting the intensity of light scattered in the forward and right angle directions, contained three regions of interest in which the percentage of cells (Mean ± standard deviation) with respect to the total was as follows: Region 1: 17.6±9.9; region 2: 5.3±1.4; region 3: 71.7±9.4. Cells from each region were sorted by flow cytometry and plated in semi-solid agar containing cell conditioned medium supportive of myeloid colony formation. Cells from region 2 contained the majority of progenitor cells that gave rise to such colonies at a plating efficiency that rose in proportion to the extent by which the region 2 cells in samples was increased through sorting. This increase in plating efficiency was 6 to 43 fold. Thus, region 2 of the cytometric distribution of cells from normal, unstained human bone marrows was a good source of myeloid progenitor cells.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 112 (1982), S. 10-18 
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Intermediate subviral particles (ISVP) derived from reovirus represent a simple model system for the switch-on of transcriptase function. In such particles the endogenous transcriptase is present in a switched-off form, one step removed from the switched-on state. Switch-on of transcriptase function is an active process in this system and can be triggered by K+ ions. A variety of agents which affect gene expression in cells were tested for an effect on switch-on in ISVP. Marked effects on switch-on in ISVP were observed with a diverse group of test agents, including DMSO and other solvents, BUdR, TdR, caffeine, theophylline, and temperature. The correlation in response between ISVP and cells suggests that the ISVP system may be useful as a model for studying the biochemical mechanisms underlying the perturbative effects of such agents on gene expression in cells.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
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