Morrione A, DeAngelis T, Baserga R
Jefferson Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.
J Virol. 1995 Sep;69(9):5300-3. doi: 10.1128/JVI.69.9.5300-5303.1995.
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.
胰岛素样生长因子I受体(IGF-IR)基因发生靶向破坏的小鼠胚胎细胞(R-细胞)对猿猴病毒40大T抗原和/或激活并过度表达的Ras介导的转化具有抗性,而这两者都能轻易地转化来自野生型同窝胚胎的细胞以及其他3T3样细胞。R-细胞对过度表达的表皮生长因子受体和血小板衍生生长因子受体β诱导的转化也具有抗性。由于血小板衍生生长因子受体β是牛乳头瘤病毒转化所必需的,我们探究了IGF-IR是否也是牛乳头瘤病毒E5癌蛋白转化所必需的。我们在此表明,R-细胞对E5介导 的转化具有抗性;将人IGF-IR重新导入R-细胞可恢复其对转化的敏感性。