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  • Alcoholic liver disease  (1)
  • Antigen-presenting cells  (1)
  • Chronische aktive Hepatitis  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 431 (1997), S. 337-344 
    ISSN: 1432-2307
    Keywords: Key words Apoptosis ; TUNEL ; Hepatocytes ; Alcoholic liver disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Alcohol-induced damage to the liver results in a wide array of typical alterations. Whereas the mechanisms involved in the pathogenesis of fatty change, hepatocyte ballooning, Mallory body formation and fibrosis have been studied in detail, little is known about hepatocyte apoptosis in alcoholic liver disease (ALD). In this retrospective study we analysed parenchymal cell death in ALD systematically by the use of in situ DNA nick-end labelling (ISEL/TUNEL). We show that increased hepatocyte TdT labelling occurs in ALD. Labelling is observed more frequently in parenchymal areas exhibiting advanced damage (ballooning degeneration with or without Mallory bodies, cholestasis and perisinusoidal fibrosis). In addition, hepatocyte TdT labelling is higher where there is septal fibrosis and nodular remodelling. Conversely, it is not elevated in ballooning hepatocytes themselves, but rather in the apparently normal hepatocytes in their vicinity.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1963
    Keywords: Schlüsselwörter Primäre biliäre Zirrhose ; Chronische aktive Hepatitis ; Antigenpräsentierende Zellen ; Key words Primary biliary cirrhosis ; Chronic active hepatitis ; Antigen-presenting cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Liver tissue from 14 female patients with primary biliary cirrhosis (PBC; stages I–IV) was systematically investigated for the prevalence and distribution of dendritic antigen-presenting cells. Dendritic cells (DCs) were immunhistochemically identified by use of anti-S 100 protein and KiMlp antibodies. We confirm previous findings that, in early PBC, S 100 protein-positive DCs can be detected within the lining of bile duct epithelia. However, the present study disclosed that S 100 protein- and KiMlp-positive DCs regularly occur in piecemeal necroses (PMNs) developing in PBC-associated chronic hepatitis. DCs in PMNs were observed in all PBC stages, but were most prominent in late-stage PBC. These findings suggest that autoimmune tissue damage in PBC may not be limited to bile ducts, but may also ensue in hepatic parenchyma, producing the pattern of chronic hepatitis with signs of activity.
    Notes: Zusammenfassung In der vorliegenden retrospektiven Untersuchung wurden Lebergewebsproben von 14 Patientinnen mit gesicherter primärer biliärer Zirrhose (PBZ) der Stadien I bis IV hinsichtlich Häufigkeit und Verteilung dendritischer, antigenpräsentierender Zellen systematisch untersucht. Dendritische Zellen (DZ) wurden immunhistochemisch mittels Anti-S-100-Proteinantikörper und KiMlp-Antikörper identifiziert. Wir bestätigen frühere Beobachtungen, daß sich bei der PBZ innerhalb von Gallengangsepithelien S-100-Protein-positive DZ nachweisen lassen. Als neuer und pathogenetisch wahrscheinlich wichtiger Befund zeigte sich indessen, daß DZ (S-100-Ag+ und/oder KiMlp+) auch in Piecemealnekrosen (PMN), welche die mit PBZ assoziierten hepatischen Veränderungen kennzeichnen, vorkommen. DZ in PMN treten in allen PBZ-Stadien auf, finden sich indessen gehäuft in den späten Stadien. Aufgrund dieser Beobachtung formulieren wir die Hypothese, daß bei der PBZ Autoimmunprozesse nicht nur im Bereich der Gallengänge, sondern auch im hepatozytären Parenchym stattfinden.
    Type of Medium: Electronic Resource
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