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J. Virol., 09 1995, 5300-5303, Vol 69, No. 9
A Morrione, T DeAngelis and R Baserga
Mouse embryo cells with a targeted disruption of the insulin-like growth
factor I receptor (IGF-IR) genes (R- cells) are refractory to
transformation by the simian virus 40 large T antigen and/or an activated
and overexpressed Ras, both of which readily transform cells from wild-type
littermate embryos and other 3T3-like cells. R- cells are also refractory
to transformation induced by overexpressed epidermal growth factor receptor
and platelet-derived growth factor receptor beta. Since the
platelet-derived growth factor receptor beta is required for transformation
by bovine papillomavirus, we inquired whether the IGF-IR was also required
for transformation by bovine papillomavirus E5 oncoprotein. We show here
that R- cells are refractory to transformation by E5; reintroduction into
R- cells of a human IGF-IR restores the susceptibility to transformation.
Copyright © 1995, American Society for Microbiology
Failure of the bovine papillomavirus to transform mouse embryo fibroblasts with a targeted disruption of the insulin-like growth factor I receptor genes
Jefferson Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.
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