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  • 1
    ISSN: 1432-2307
    Keywords: Breast carcinoma ; Adenocarcinoma ; Tumour cell heterogeneity ; Monoclonal antibody b-12 ; Tumour marker ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A mouse monoclonal antibody, MAb b-12, has been described previously (Stähli et al. 1985) which reacts with a Mr 350 kD glycoprotein with mucin-like characteristics (Stähli et al. 1987) expressed in cytoplasm and on the surface of human breast carcinoma cell lines (MCF-7 and ZR-75-1). In the present report the immunohistochemical reactivity of this MAb with normal and malignant human tissues is analyzed. Pre-experiments showed that the epitope b-12 is resistant to formalin treatment allowing the use of tissue processed by standard paraffin embedding methods. 167 normal and 408 neoplastic tissues were tested by indirect immunofluorescence or the avidin-biotin complex method. MAb b-12 stained the apical cytoplasm of secretory epithelia and their secretions including the acinar and ductular epithelia of the breast. It reacted with all breast carcinomas independent of their histological type or stage, frequently with all but in some cases with a fraction of the tumour cells. Some other carcinomas, primarily those of adenomatous differentiation, were also reactive. In these, however, the fraction of positive tumour cells was usually lower. The b-12 epitope is thus a marker for normal and neoplastic epithelia with secretory functions, particularly for breast carcinomas of all histological types and stages, and perhaps a differentiation marker for abortive adenomatous differentiation in solid carcinomas of the gastro-intestinal, uro-genital or respiratory tract.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Akute Virushepatitis ; „Hippie“-Hepatitis ; Chronisch persistierende Hepatitis ; Chronisch aggressive Hepatitis ; Hepatitis unter Immunsuppression ; Hepatitis B Antigen-Carrierstatus ; Immunfluorescenz-Methode zur anti-HBcAg-Bestimmung ; Acute viral hepatitis ; “Hippie” hepatitis ; Chronic persistent hepatitis ; Chronic aggressive hepatitis ; Hepatitis under immunosuppression ; Hepatitis B antigen carrier state ; Immunofluorescence method for anti-HBcAg determination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The occurrence of anti-HBcAg antibodies in the blood as determined by indirect immunofluorescence and its relation to the occurrence of HBsAg in the cytoplasm and of HBcAg and IgG in the nuclei of hepatocytes were studied in the following groups of patients (total of 123 biopsies): I. 64 HBAg-negative patients with various liver diseases; II. 51 HBAg-positive patients without therapeutical immunosuppression (6 acute hepatitis, 10 nonspecific reactive and 10 chronic persistent hepatitis, 19 chronic aggressive hepatitis, 6 „Hippie“-hepatitis); III. 8 kidney transplant recipients. It could be shown that nuclear IgG is found only if both parameters can be demonstrated at the same time: HBcAg in liver cell nuclei and anti-HBcAg antibodies in the serum in titers higher than 1:64. Accordingly, all types of hepatitis with excess formation of nuclear HBcAg (early phase of acute hepatitis, chronic aggressive hepatitis and chronic non-aggressive forms with generalized core formation, i.e. carrier state or chronic persistent hepatitis of the HBc type) may show nuclear fluorescence for IgG. All forms of hepatitis B without detectable core formation (acute hepatitis in the elimination phase, chronic nonaggressive hepatitis with isolated HBsAg expression, i.e. carrier state or chronic persistent hepatitis of the HBs type, posthepatitic phase) do not present nuclear IgG despite eventual anti-HBcAg formation. Finally, lack of anti-HBcAg or very low titers associated with lack of IgG in hepatocytic nuclei do not exclude generalized core formation in liver cell nuclei in chronic persistent hepatitis of effectively immunosuppressed patients. Although the demonstration of nuclear IgG has several diagnostic and prognostic consequences in common with the demonstration of HBcAg, a specific search for the core antigen in the tissue is needed for the correct appraisal of the HBcAg- and HBsAg tissue expression pattern and the associated disease.
    Notes: Zusammenfassung Mit der indirekten Immunfluorescenz-Methode wurden anti-HBcAg-Antikörper im Blut bestimmt und ihr Vorkommen in Beziehung gesetzt zum Nachweis von HBsAg im Zytoplasma und HBcAg sowie IgG im Zellkern in Leberbiopsien von insgesamt 123 Probanden. Das Untersuchungskollektiv umfaßte 64 HBAg-seronegative Patienten mit unterschiedlichen Leberkrankheiten, 51 HBAg-seropositive Patientenohne therapeutische Immunsuppression (darunter histologisch 6 akute Hepatitis, 10 unspezifisch reaktive Hepatitis, 10 chronisch persistierende Hepatitis, 19 chronisch aggressive Hepatitis und 6 „Hippie“-Hepatitis) sowie 8 sero-positive immunsupprimierte Nierentransplantat-Empfänger. IgG war immer dann darstellbar, wenn gleichzeitig die Leberzellkerne positiv ausfielen für HBcAg und anti-HBcAg-Titer im Blut den Titerwert von 1:64 überstiegen. So ließen alle Hepatitisformen mit ausgeprägter nukleärer Core-Bildung, wie Frühphase der akuten Hepatitis, chronisch aggressive Hepatitis und nicht-aggressive Formen mit generalisierter HBcAg-Expression (z.B. chronisch persistierende Hepatitis oder Trägerstatus vom HBc-Typ) nukleäres IgG erkennen. Alle Varianten der Hepatitis Bohne faßbares HBcAg im Gewebe (akute Hepatitis in der Eliminationsphase oder posthepatitisch, chronisch persistierende Hepatitis und Trägerstatus vom HBs-Typ) hingegen waren negativ auf nukleäres IgG und zwar auch in Fällen mit nachweisbaren anti-HBc-Antikörpern im Blut. Bei effektivimmunsupprimierten Patienten mit chronisch persistierender Hepatitis schließlich war IgG im Gewebe negativ und die Bluttiter für anti-HBc waren negativ oder sehr niedrig, so daß in diesen Fällen eine generalisierte nukleäre Core-Expression nicht erfaßt werden konnte. Wenn auch dem Nachweis von IgG im Lebergewebe eine gewisse diagnostische und prognostische Bedeutung zuzusprechen ist, ist doch der spezifische Nachweis von HBcAg im Gewebe in der Ermittlung des HBc- und HBs-Ag-Expressionsmusters im Gewebe und damit in der korrekten Einstufung einer Hepatitis B-Virusinfektion überlegen.
    Type of Medium: Electronic Resource
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