Zusammenfassung
Einerseits werden Invasion und Metastasierung durch die Hinaufregulation der Expression der kritischen Komponenten gefördert; diese können als Produkte dominanter Gene betrachtet werden. Proteasen (Kathepsine, Kollagenasen, Plasminogenaktivatoren usw.) sind erste Kandidaten in dieser Gruppe (Basset et al. 1990), da diese Moleküle den für invadierende Tumorzellen notwendigen Raum schaffen können. Auch Zelladhäsionsmo-leküle und Lektine sind beteiligt, da die invadierenden Zellen auf ihrem Wanderpfad ständig neue Kontakte herstellen. Zum Beispiel wurde eine gespleißte Variante des Zelladhäsionsmoleküls CD44 entdeckt, die nach Transfektion der entsprechenden cDNS in niedrig-metastatische Zellen das metastatische Potential erhöht (Günthert et al. 1991). Motilitäts- und Wachstumsfaktoren, welche die Zellmotilität beeinflussen, können auch auf das Invasionsverhalten Auswirkungen haben. Zum Beispiel fördern der Scatterfaktor und der Fibroblastenwachstumsfaktor die Invasivität von Epithelzellen in vitro (Weichner et al. 1990; Jouanneau et al. 1991). Die cDNS für den Rezeptor des autokrinen Motilitätsfaktors (AMF), der an der Progression von Harnblasenkarzinomen beteiligt zu sein scheint, wurde bereits charakterisiert; das kodierte Protein weist eine Homologie zu p53 auf (Watanabe et al. 1991).
Übersetzung aus dem Engl. von Belinde Junkers.
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Birchmeier, W., Weidner, K.M., Schipper, J., Behrens, J. (1993). Molekulare Aspekte der Invasion von Krebszellen. In: Rübben, H., Goepel, M., Schmitz-Dräger, B.J. (eds) Immuntherapie in der Uroonkologie. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77830-8_10
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