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  • 1
    ISSN: 1432-1076
    Keywords: Key words 3-Oxo-Δ4-steroid 5β-reductase deficiency ; 3-oxo-Δ4 bile acid ; Immunoblot analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A 3-oxo-Δ4-steroid 5β-reductase (5β-reductase) deficiency is difficult to diagnose because severe liver damage can result in a similar pattern of metabolite excretion. We investigated the usefulness of immunoblot analysis for diagnosis of 5β-reductase deficiency and quantitatively analysed urinary bile acids by gas chromatography-mass spectrometry in a 5-month-old Japanese boy with severe neonatal cholestasis associated with hypertyrosinaemia. A liver sample was examined by immunoblot analysis using monoclonal antibodies against 5β-reductase. Urinary 3-oxo-Δ4 bile acids accounted for 88.3% of total bile acids, 5α-bile acids for 0.9%, and primary bile acids for 9.1%. Immunoblot analysis of the liver tissue showed an indistinct band of 5β-reductase. Conclusions These findings suggest that this patient had a secondary 5β-reductase deficiency due to severe liver damage, even though 3-oxo-Δ4 bile acids constituted more than 70% of total urinary bile acids. However, the patient may possibly have had an inherited 5β-reductase deficiency.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1437-1596
    Keywords: Immunohistochemistry ; Salivary gland ; Specific monoclonal antibody ; ABO(H) blood group antigens ; Species identification ; Immunhistochemie ; Speicheldrüse ; spezifischer monoklonaler Antikörper ; ABH-Blutgruppenantigene ; Speziesidentifikation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Ein neuartiger monoklonaler Antikörper von der Maus (P4-5C) wurde entwickelt, der den Kern des Proteins erkennt, welches die ABO-Blutgruppenantigene im menschlichen Speichel trägt. Dieser erwies sich als spezifisch für menschlichen Speichel über die Benutzung immunchemischer Methoden, wie enzymgekoppelter Immunabsorptions-Test, OuchterlonyMethode, Kreuz-Elektrophorese. Durch licht- und elektronenmikroskopische Untersuchungen mit immunhistochemischen Techniken unter Verwendung dieses Antikörpers konnte gezeigt werden, daß eher spezifisch und exklusiv mit Schleim von den mukösen Zellen der menschlichen Speicheldrüsen reagiert. P4-5C reagierte weder mit mukösen Zellen anderer Primaten (Mantelpavian, japanischer Affe, Rhesus-Affe) und 4 Säugetieren (Hund, Katze, Ratte und Maus) noch mit anderen menschlichen Geweben. Das Epitop des Kernanteils des ABH-tragenden Proteins wurde definiert als P4-5C und konnte von dem Epitop der ABO-Blutgruppen-Antigene unterschieden werden mit Hilfe der Immun-Elektronenmikroskopie, obwohl diese beiden Epitope relativ nahe beieinander lokalisiert waren. Der P4-5C monoklonale Antikörper kann auch benutzt werden für die morphologische Spezies-Identifikation von Gewebsproben von den Glandulae submandibularis.
    Notes: Summary A novel mouse monoclonal antibody (P4-5C) has been developed which recognizes the core portion of the protein carrying ABO(H) blood group antigens in human saliva. This proved to be specific for human saliva using immunochemical investigations such as enzymelinked immunosorbent assay, Ouchterlony method and counter-immunoelectrophoresis. By licht and electron microscope studies with immunohistochemical techniques using this human saliva-Specific P4-5C as primary antibody, it was shown that P4-5C reacted specifically and exclusively with mucus from the mucous gland cells of human salivary glands. P4-5C reacted neither with the mucous gland cells of other primates (hamadryas baboon, Japanese monkey and Rhesus monkey) and four mammals (dog, cat, rabbit and mouse) nor with other human tissues. The epitope on the core portion of the ABO(H)-carrying protein was defined by P4-5C and could be discriminated from the epitope of ABO(H) blood group antigens using immunoelectronmicroscopy, although these 2 epitopes were localized relatively close to each other. The P4-5C monoclonal antibody can be also used for morphological species identification of tissue specimens from submandibular glands.
    Type of Medium: Electronic Resource
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