Modeling oncogene addiction using RNA interference

作者: S. M. Rothenberg , J. A. Engelman , S. Le , D. J. Riese , D. A. Haber

DOI: 10.1073/PNAS.0803217105

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摘要: The clinical efficacy of selective kinase inhibitors suggests that some cancer cells may become dependent on a single oncogene for survival. RNAi has been increasingly used to understand such "oncogene addiction" and validate new therapeutic targets. However, approaches suffer from significant off-target effects limit their utility. Here, we combine carefully titrated lentiviral-mediated short hairpin RNA knockdown the epidermal growth factor receptor (EGFR) with heterologous reconstitution by EGFR mutants rigorously analyze structural features signaling activities determine addiction mutationally activated in human lung cells. dependence is differentially rescued distinct variants oncogenic mutants, critically its heterodimerization partner ErbB-3, surprisingly, does not require autophosphorylation sites cytoplasmic domain. Quantitative rescue" analysis allows mechanistic dissection addiction, and, when broadly applied, provide functional validation potential targets identified through large-scale screens.

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