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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 15 (1982), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Large granular lymphocytes (LGL) are nonadherent cells with cytoplasmic azurophilic granules, avid receptors for the Fc portion of IgG, and a paranuclear localization of alpha-naphthyl acid esterase or acid phosphatasc. LGL constitute the bulk of TG cells (cells with receptors for sheep erythrocytes and for IgG molecules) and null cells (non-T, non-B cells). In the present study we demonstrate that 20–33% of the circulating human LGL express receptors for the third complement component (C3R). When TG cell or null cell fractions from normal individuals or non-T cells from a patient with infantile agammaglobulinaemia (which contained almost exclusively LGL) were rosetted with erythro cytes coated with antibody and complement, a variable number of C3R-bearing cells were detected. Such cells were isolated and analysed further; the great majority of them displayed the cytochemical and ultrastructural features of LGL.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Human peripheral blood large granular lymphocytes (LGL)—that is, cells with intracytoplasmic azurophilic (electron-dense) granules, with a positiviiy for the cytochemical localization of certain acid hydrolascs, and with avid surface receptors for the Fc portion of IgG—have been purified on Percoll density gradients. Approximately 30% of these cells expressed receptors for the third complement component (C3R). They were separated into C3R-positive and C3R-negative cells. C3R− cells had a significantly greater natural killer (NK) activity against K562 target cells than C3R+ cells. This difference was unrelated to the presence in the C3R+ cells of a contaminant cell type incapable of NK activity, since cytochcmical and ultrastructural analysis revealed that C3R+ and CR− fractions contained comparable LGL numbers. Agarose cytotoxicity assays at the single-cell level demonstrated that C3R + LGL contained a large number of cells that bound to but did not lyse the target. The remaining fully cytotoxic C3R+ LGL had, however, the same killing and recycling properties as the cells from the OR fraction. Electron microscopy and cytochcmical studies showed that C3R+cells had fewer electron-dense granules than C3R cells and stained more faintly for the localization of α-naphtyl acetate eslerase. In contrast to C3R cells. C3R+ LGL displayed morphological features suggesting that an active process of granule formation was taking place. Taken together, the data indicate that C3R+ cells represent a discrete subset or a maturationsl stage of LGL.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2277
    Keywords: Key words Kidney transplant ; Cytomegalovirus infection ; CMV prophylaxis ; CMV therapy ; Pediatric recipients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Cytomegalovirus (CMV) infection is still a major cause of morbidity in high-risk renal transplant recipients. In the present report, we have reviewed our records of renal transplant pediatric recipients (RTPR; mean age 14.1 ± 4.9 years) since 1991, when we started a policy of CMV prophylaxis constituting high-dose oral acyclovir plus CMV hyperimmune immunoglobulins (Hlg) followed by early i. v. ganciclovir therapy in high-risk patients (i. e., CMV donor + / recipient −). Four patients received a kidney from a living relative (LR), 2 patients had one previous transplant, and 1 had a combined liver – kidney transplant. Thirty-three patients who were negative for CMV antibodies (ab) before transplantation received a kidney from CMV ab positive donors. The immunosuppressive regimen included cyclosporine A and steroids, with the addition of azathioprine in the 4 patients who received an LR kidney. Serial assessments for CMV antigenemia (pp 65) were routinely performed for 6 months after transplantation to define CMV infection. Among the 33 CMV seronegative recipients (R −) who received the graft from a CMV seropositive donor (D +), 18 (54.5 %) experienced CMV infection, whereas among the 28 CMV R +, who received a graft from a CMV D +, 11 (39.3 %) experienced CMV infection. With regard to CMV − related symptoms, only 2 patients suffered from a CMV syndrome (fever and leukopenia in 1 patient, fever and arthralgia in the other). In no case did the spectrum of CMV disease occur; only minor symptoms were present in 7 of the remaining CMV-infected patients (fever in 6 and leukopenia in 1). Rejection episodes and renal function did not differ between CMV-infected and non-CMV-infected patients. Our experiences support the use of prophylactic acyclovir plus CMV HIg followed by early therapy with i. v. ganciclovir to combat the risk of increased morbidity in high risk RTPR.
    Type of Medium: Electronic Resource
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