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  • Electronic Resource  (3)
  • 1970-1974  (3)
Material
  • Electronic Resource  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 79 (1973), S. 224-233 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Onkogenität von Zellen des C3H/He-Speicheldrüsen-Adenocarcinoms der Maus in Gewebekulturen ist eng verknüpft mit der Anwesenheit von Virus-partikeln (Bittner). Sowohl in quantitativer wie in qualitativer Hinsicht ist das Wachstum der implantierten Tumorzellen ähnlich dem in vivo beobachteten, jedoch vollkommen verschieden von dem des ebenfalls durch das Bittner-Virus hervorgerufenen Mammatumors. Nach 180 Tagen verschwinden die Viruspartikel aus den Zellen, wonach sie nicht mehr onkogen sind, wenn sie in isogene Wirtstiere transplantiert werden. Die frühen Phasen der Tumorzellen in der Gewebekultur sind durch epitheliale Beschaffenheit und Bildung von Pseudotubuli charakterisiert. Dieses Verhalten ändert sich auch nicht beim Altern der Kulturen, doch wurde gelegentlich eine pseudo-fibroblastische Umwandlung bei sehr alten Kulturen beobachtet. Dieser Vorgang ist durch eine „eosinophile Dengeneration” gekennzeichnet. In der Evolution des Tumors in vitro scheint eine Beziehung zwischen Verschwinden der Viruspartikel, dem Verlust der Onkogenität und dem Auftreten von eosinophilen Körperchen zu bestehen.
    Notes: Summary The oncogenicity of the cultivated cells of C3H/He mouse salivary gland adenocarcinoma is strictly correlated with the presence of the viral particles (Bittner). From both a quantitative and a qualitative standpoint the growth of the implanted tumor is similar to that observed in vivo and completely different from the mammary gland tumor which is also produced by Bittner virus. After 180 days the viral particles disappear from the cell and thereafter the cells are no longer oncogenic when implanted in isogeneic hosts. The early phases of culture are characterized by the epithelial feature of the tumor with a pseudotubular pattern. This feature is not modified with aging of the cultures, however a pseudo-flbroblastic transformation has occasionally been observed in very old samples. This step of evolution is characterized by “eosinophilic degeneration”. In the evolution of in vitro-tumor a relationship appears to exist between the disappearance of virus particles, the loss of oncogenicity and the presence of eosinophilic bodies.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 27 (1971), S. 434-435 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Riassunto Cellule portatrici di virus derivate da adenocarcinoma della ghiandola salivare coltivate in vitro sono oncogeniche per l'ospite isogenico per circa sei mesi di coltura. Dopo tale periodo perdono l'oncogenicità e non è più possibile ritrovare particelle virali. Sulla base di questi risultati si conclude che il virus è l'agente causale dell'adenocarcinoma della ghiandola salivare del topo C3H/He.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 26 (1970), S. 780-781 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Riassunto Dai dati riferiti si mettono in evidenza due punti: il primo dimostra nel tumore in esame l'assenza di particelle virali e di effetto citopatico specifico per il virus polioma. Inoltre non si mettono in evidenza anticorpi fissanti il complemento o emoagglutinoinbenti per il virus polioma negli animali portatori di tumori. II secondo punto dimostra che durante il suo sviluppo il tumore della ghiandola salivare é incapace di indurre una risposta immunologica apprezzabile.
    Type of Medium: Electronic Resource
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