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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 226 (1980), S. 213-218 
    ISSN: 1434-4726
    Keywords: Larynxkarzinom ; maligne Keratinozyten ; saure Phosphatase ; Lysosomen ; Zytochemie ; Laryngeal carcinoma ; Malignant keratinocytes ; Acid phosphatase ; Lysosomes ; Cytochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The subcellular distribution of acid phosphatase in malignant keratinocytes of invasive laryngeal carcinoma was studied by ultrastructural cytochemistry. The reaction product was localized in Golgi, ER, and some cytoplasmic vesicles. Acid phosphatase activity was also observed in lysosomal structures in the cortical cytoplasm of basal carcinoma cells. Extracellular acid phosphatase activity also occurred at the tumor-stroma junction in membrane-bound vesicular structures. The localization of acid phosphatase in this report is discussed in relation to acid phosphatase activity in other tumors. The findings lend further support to the important role of hydrolytic enzyme release in respect to tumor invasion into surrounding tissues.
    Notes: Zusammenfassung Die subzelluläre Verteilung von saurer Phosphatase in malignen Keratinozyten des invasiven Larynxkarzinoms wurde mit Hilfe der ultrastrukturellen Zytochemie untersucht. Das Reaktionsprodukt war im Golgi-Apparat, endoplasmatischen Retikulum und in einigen zytoplasmatischen Vesikeln lokalisiert. Saure Phosphatase-Aktivität wurde auch in lysosomalen Strukturen im kortikalen Zytoplasma der basalen Karzinomzellen beobachtet. Extrazellulär fand sich Phosphatase-Aktivität in membranbegrenzten Strukturen an der Tumor-Stromagrenze. Die Lokalisation der sauren Phosphatase in der vorliegenden Arbeit wird in Hinblick auf saure Phosphatase-Aktivität in anderen Tumoren erörtert. Die Ergebnisse unterstreichen die bedeutende Rolle, welche der Freisetzung von hydrolytischen Enzymen bei der Tumorinvasion in umgebende Gewebe zukommt.
    Type of Medium: Electronic Resource
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