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  • 1
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 14 (2000), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Biologically derived porcine secretin has been used as a diagnostic agent in clinical gastrointestinal practice for many years. Pure synthetic porcine secretin is now available for investigational clinical use.〈section xml:id="abs1-2"〉〈title type="main"〉Aim:To compare the pharmacology of synthetic porcine secretin and biologically derived porcine secretin in healthy volunteers.〈section xml:id="abs1-3"〉〈title type="main"〉Methods:Secretin stimulation tests were performed in 12 volunteer subjects in a double-blind, randomized, Latin square crossover design study comparing three doses of synthetic porcine secretin (0.05, 0.2, and 0.4 μg/kg) with a standard dose of biologically derived porcine secretin (1 CU/kg). Duodenal aspirates were analysed for total volume and for bicarbonate concentration. Total bicarbonate output was calculated.〈section xml:id="abs1-4"〉〈title type="main"〉Results:Twelve subjects completed four dosing regimens. A multiple comparison test was used to compare dosing regimens. The 0.2 and 0.4 μg/kg doses of synthetic porcine secretin were not different from the 1 CU/kg dose of biologically derived porcine secretin for volume, bicarbonate concentration and total output from 0 to 60 min. Only one patient had an adverse event, which was mild, transient flushing after the 0.2 and 0.4 μg/kg doses of synthetic porcine secretin and after the 1 CU/kg dose of biologically derived porcine secretin.〈section xml:id="abs1-5"〉〈title type="main"〉Conclusions:Synthetic porcine secretin has identical pharmacologic effects to biologically derived porcine secretin in normal subjects. Both drugs were safe and well-tolerated. This study validates synthetic porcine secretin as a substitute for biologically derived porcine secretin.
    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 24 männliche, homosexuelle Personen, die an dem Lymphadenopathie- oder erworbenen Immundefektsyndrom erkrankt sind, wurden mit indirektem ELISA und Western blot unter Verwendung monoklonaler „Tracer“ auf HIV-Antikörper in den Immunglobulinklassen A, G, M und den Immunglobulinsubklassen G 1–4 untersucht. Alle untersuchten Patienten wiesen HIV-spezifische Serum-Antikörper in der Immunglobulinsubklasse G1 auf, etwa die Hälfte im IgG3, nur zwei bzw. einer im IgG2 und IgG4. IgM-Antikörper gegen HIV waren nur bei einem Patienten nachweisbar, bei dem eine Serokonversion bei Verlaufsuntersuchungen mit mehreren Blutproben festgestellt wurde. Von 12 Patienten mit Zeichen einer beginnenden Enzephalitis wurden auch Liquorproben getestet. Während die liquorständigen Antikörper gegen HIV im allgemeinen auf die IgG-Subklasse 1 beschränkt sind, ließen sich in zwei Fällen zusätzlich in den Blutproben nicht vorhandene IgM-Antikörper finden. Die intrathekale, pathognomonische Antikörperproduktion bei HIV-Infektion, im wesentlichen gegen die Strukturproteine gp120, gp41 und p24 gerichtet, kann durch die vergleichende Messung von Antikörpern gegen das Herpes simplex-Virus in Blut- und Liquorproben abgesichert werden.
    Notes: Summary Twenty-four homosexual adult patients suffering from LAS or AIDS were investigated for immunoglobulin class- and IgG subclass-specific antibodies to human immunodeficiency virus (HIV) by the indirect ELISA and Western blot using monoclonal tracer antibodies. All patients revealed HIV-specific serum antibodies of IgG subclass 1, and half of them IgG3. Only two had IgG2 and one IgG4 antibodies. IgM-anti-HIV was present in a person who presented a seroconversion in subsequent blood specimens. In twelve patients who developed signs of an ongoing encephalitis, cerebrospinal fluid specimens were also tested. HIV-specific IgG antibodies were usually restricted to the subclass 1. In two cases specific IgM was found to be present, although lacking in the blood specimens. By comparison with HSV antibody detection in blood and CSF, an intrathecal, possibly pathognomonic antibody formation to HIV could be confirmed, mainly directed to gp120, gp41 and p24.
    Type of Medium: Electronic Resource
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