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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 34 (1991), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The CD4 molecule has several biological functions, physiologically as a receptor for major histocompatibility complex class II molecules on antigen-presenting cells, and pathologically as a receptor for human immunodeficiency virus (HIV) by its binding to the HIV envelope glycoprotein gp 120 The frequency of’CD4+ cells has been shown to correlate positively with both susceptibility and cytopathogenic effect by HIV. To determine if CD4 expression varied during the cell cycle, a CD4-cxpressing monocytoid cell line. U 937 clone 16, was synchronized with regard lo cell growth. The CD4 antigen was analysed with regard to expression, density and rate of reappearance after treatment with trypsin during the different phases of the cell cycle. The CD4 reappearance rate was found to be maximal during the S phase. This was followed by an increased expression and density in the late S G2 phase. Thus a cell cycle-dependent expression of CD4 molecules on the cell surface was observed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 31 (1990), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Two-colour flow cytometric analysis was performed on paired samples of peripheral blood (PB) and cerebrospinal fluid (CSF) of patients with untreated multiple sclerosis (MS) and, for reference, subjects with muscular tension headache (TH) using anti-CD3, anti-CD4, anti-CD8, and anti-HLA-DR monoclonal antibodies in different combinations. CD4+/CD8+ T-cell ratio was increased in CSF compared to PB in both MS patients and TH subjects to a similar extent. This was mainly due to higher CD4+ T-cell levels in the CSF compartment. The proportion of HLA-DR+ T cells was higher in CSF than PB in both MS and TH; this increase of DR+ T cells in CSF was more prominent in MS. The level of CD4+ CDS+ T cells, which represent a subset of activated T cells, was not different between CSF and PB, either in MS or in TH. The proportion of CD4− CD8− T cells, which were found generally not to be blast cells, was lower in CSF compared to PB in both patient groups. However, their CSF level was higher and their PB level lower in MS compared to TH. Results point to an accumulation of activated T-helper cells in the CSF of both MS patients and healthy subjects. Fetal-type CD4− CD8− T cells bearing the unusual T-cell receptor γ/δ seem to be selectively recruited to the CSF of MS patients.
    Type of Medium: Electronic Resource
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