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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of virology 120 (1991), S. 233-240 
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We present data on the distribution of human immunodeficiency virus (HIV-1) proviral DNA in different subsets of peripheral blood mononuclear cells (PBMCs) over an observation period of eight months. Eleven patients with well documented HIV-1 infection were studied. The PBMCs were obtained at two intervals and purified by fluorescence-activated cell sorting (FACS) after staining with FITC-labelled monoclonal antibodies. Varying numbers of FACS-sorted CD4+ cells, CD8+ cells and peripheral monocytes were assayed for HIV-1 proviral DNA (env andgag region) by PCR. Samples from patients at CDC stages II or III had to contain 103−104 cells in order to allow detection of proviral HIV-1 DNA. At CDC stage IV, however, HIV-1 DNA was detected in as few as 100 CD4+ T-lymphocytes. In contrast, in peripheral monocytes HIV-1 DNA was not regularly found. CD8+ cells did not harbor detectable amounts of proviral DNA. During an observation period of eight months, the rate of infected CD4+ T-lymphocytes increased significantly in three patients while staying constant in the remaining eight patients. This increase of the infection rate was paralleled by clinical progression in one patient and by a decrease of the absolute number of CD4+ cells in another patient. The percentage of CD4+ cells harboring the viral genome increases in the course of the disease. These results may help to explain the decrease in CD4+ T-lymphocyte counts during HIV-1 infection.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 29 HIV-1 infizierte Patienten (8 mit ARC, 21 mit AIDS) wurden zur Evalüierung von Toleranz, Toxizität undin Vivo-Antigenität mit einem rekombinanten Peptid aus dem Transmembran-Protein des HIV-1 geimpft. Dieses Peptid ist an 2,4 Dinitrophenyl (DNP) Ficoll (F46), cin T-Zell unabhängiges Adjuvans, gekoppelt. Den Patienten wurden entweder 0,1 mg oder 0,3 mg F46 intradeltoidal verabreicht. Fünf der Patienten mit AIDS erhielten eine Boosterinjektion, vier davon zweimalig. Anti F46-Antikörper wurden vor der Impfung und an den Tagen 7, 14, 21, 28, 90, 180 und 270 nach der Impfung bestimmt. Bei 10/21 der Patienten mit AIDS und 1/8 der Patienten mit ARC überstiegen die Antikörpertiter zumindest einmal im Verlaufe der Beobachtungsperiode das Zweifache der Ausgangskonzentration. Insgesamt war die Antikörperantwort allerdings nur schwach und unabhängig von sowohl der F46-Dosis als auch den Patientencharakteristika. In dieser Phase I/II-Studie wurden keine Zeichen von Unverträglichkeit oder einer beschleunigten Krankheitsprogression nach der Impfung mit der therapeutischen Vakzine F46 beobachtet.
    Notes: Summary In order to evaluate tolerance, toxicity, andin vivo antigenicity, 29 HIV-1-infected patients (eight with ARC and 21 with AIDS) were vaccinated with a synthetic peptide derived from the gp41 transmembrane protein of the HIV-1. This peptide had been coupled with 2.4 dinitrophenyl-Ficoll (F46), a T-cell independent adjuvant. The patients received a single intradeltoid injection of either 0.1 or 0.3 mg of F46. Five of the individuals with AIDS were boostered, four of them twice. Anti-F46 antibody titers were measured before vaccination, and on days 7, 14, 21, 28, 90, 180 and 270 after vaccination. Anti-F46 titers rose at least twofold over prestudy values in 10/21 individuals with AIDS and in 1/8 individuals with ARC at least once during the observation period. The overall response, however, consisted of only weak antibody production that was independent of the dose or patient characteristics. No signs of toxicity or of clinical progression related to the vaccination were observed in this phase I/II trial of a T-cell independent therapeutic vaccine.
    Type of Medium: Electronic Resource
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