Ornithine decarboxylase overexpression leads to increased epithelial tumor invasiveness.
نویسندگان
چکیده
Ornithine decarboxylase (ODC) overexpression cooperates with genetic lesions such as an activated c-rasHa to enhance epithelial tumorigenesis. To assess the invasiveness of ODC-overexpressing cells, two noninvasive epidermal cell lines, nontumorigenic BK-1 cells, and the papilloma-derived cell line SP-1 were infected with a replication-defective retrovirus that overexpresses ODC, inoculated into deepithelialized rat tracheas, and transplanted into athymic nude mice. After 5 weeks, ODC-overexpressing BK-1 cells remained localized on the luminal surface of the tracheal xenotransplants, whereas the ODC-overexpressing SP-1 cells were extremely invasive, with the whole tracheal wall penetrated. This invasiveness of ODC-overexpressing SP-1 cells was accompanied by elevated proteinase expression, including increased urokinase plasminogen activator activity in ODC-overexpressing cells and elevated stromelysin-1 mRNA expression in the stromal cells of invaded tracheal transplants.
منابع مشابه
Epithelial Tumor Invasiveness Ornithine Decarboxylase Overexpression Leads to Increased
Ornithine decarboxylase (ODC) overexpression cooperates with genetic lesions such as an activated c@rashta to enhance epithelial tumorigenesis. To assess the invasiveness of ODC-overexpressing cells, two noninvasive epi dermal cell lines, nontumorigenic BK-i cells, and the papilloma-derived cell line SP-i were infected with a replication-defective retrovirus that overexpresses ODC, inoculated i...
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عنوان ژورنال:
- Cancer research
دوره 57 11 شماره
صفحات -
تاریخ انتشار 1997