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  • 1
    ISSN: 1432-1440
    Keywords: T lymphocytes ; T lymphocytes, activated ; T lymphocytes, cytotoxic ; HIV ; AIDS ; Flow cytometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The phenotypic characterization of lymphocyte subsets in relation to different clinical stages of HIV infection has mainly focussed on CD4 and CD8 cells. Some reports focus on expansion of activated T lymphocytes in AIDS patients. Yet there is no detailed knowledge whether such changes occur also in earlier stages of HIV infection. In order to describe the kinetics and possible pathogenetic meaning of this subset when related to all distinct chronologic stages, we performed two-color flow cytometric lymphocyte differentiation in 173 HIV-infected patients and 30 healthy controls. All subjects were classified according to the Walter Reed (WR) system. Our results show that a significant increase of activated T lymphocytes (CD3+HLA/DR+) occurs early, in WR1 and WR2, thus preceding the clinically relevant CD4 depletion. This increase is paralleled by an expansion of CD 8+Leu7+cytotoxic cells. We conclude, thatearly changes of lymphocyte subsets are detectable in addition to inversion of the CD4/ CD8 ratio. The possible pathogenetic meaning including the question of possible autoimmune mechanisms is discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Research in experimental medicine 175 (1979), S. 169-180 
    ISSN: 1433-8580
    Keywords: Vitamin B6-Antagonists ; Immunosuppression ; Renal transplantation ; Vitamin B6-Antagonisten ; Immunsuppression ; Nierentransplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In mehreren Versuchsserien wurde an 84 Inzuchtratten die Wirkung eines kombiniert-pharmakologisch-diätetischen Vitamin B6-Mangels auf die Abstoßung von Nierentransplantaten geprüft. Während bei den Kontrolltieren ohne Vitamin B6-Mangel über 90% der Tiere zwischen 7. und 13. Tag an einer abstoßungsbedingten Urämie eingingen, zeigten die behandelten und erfolgreich nierentransplantierten Ratten eine deutliche Verlängerung der Überlebenszeit. 17 von 38 Tieren (45%) lebten länger als 35 Tage. Pharmakologisch (Desoxipyridoxin) — in Kombination mit einer Vitamin B6-armen Diät — induzierter Vitamin B6-Mangel bietet somit die Möglichkeit einer — reversiblen — Immunsuppression.
    Notes: Summary The combined effect of Vitamin B6 free diet and 4-Desoxipyridoxin (a potent Vitamin B6-Antagonist) on the rejection reaction of inbred rats after renal transplantation was investigated. More than 90% of the control animals without Vitamin B6-deficiency died between 7 and 13 days with uremia due to an acute transplant rejection, where as the Vitamin deficient and successfully transplanted animals (n = 38) showed a significantly prolonged survival time. In 17/38 rats survival was longer than 35 days. Vitamin B6-deficiency, induced by Desoxipyridoxin and Vitamin B6-deficient diet offers the possibility of an effective and reversible immunosuppression in renal transplantation.
    Type of Medium: Electronic Resource
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