Tumor-selective transgene expression in vivo mediated by an E2F-responsive adenoviral vector

Tumor-selective transgene expression in vivo mediated by an E2F-responsive adenoviral vector
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E2F 响应腺病毒载体介导的体内肿瘤选择性转基因表达

DOI:
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发表时间:
1997
期刊:
Nature Network Boston
影响因子:
--
通讯作者:
H. Fine
H. Fine
中科院分区:
--
文献类型:
--
作者:
M. Parr;Y. Manome;Toshihide Tanaka;P. Wen;D. Kufe;W. Kaelin;H. Fine

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最近的数据表明,许多肿瘤(例如恶性神经胶质瘤)已经破坏了 pRB 功能,这要么是由于 RB-1 基因突变,要么是影响 pRB 上游调节因子(例如细胞周期蛋白 D1 或 p16/INK4a/MTS1)的突变的结果(参考文献 1-5)。 pRB 的肿瘤抑制作用与其抑制 E2F 响应启动子(例如 E2F-1 启动子)的能力有关6,7。因此,尚未在体内实验证明的预测是,由于“游离”E2F 过量和 pRB/E2F 阻遏物复合物的丢失,E2F 响应启动子在肿瘤细胞中相对于正常细胞应该更活跃。我们证明,含有由 E2F-1 启动子驱动的转基因的腺病毒载体可以介导体内肿瘤选择性基因表达,从而能够根除已形成的神经胶质瘤,并且与标准腺病毒载体相比,其正常组织毒性显着降低。我们的数据表明 E2F-1 启动子的去抑制发生在体内癌细胞中,这一发现可用于设计介导肿瘤选择性基因表达的病毒载体。
Recent data suggest that many tumors, such as malignant gliomas, have disrupted pRB function, either because of RB-1 gene mutations or as a result of mutations affecting upstream regulators of pRB such as cyclin D1 or p16/INK4a/MTS1 (ref. 1–5). Tumor suppression by pRB has been linked to its ability to repress E2F-responsive promoters such as the E2F-1 promoter6,7. Thus, a prediction, which has not yet been demonstrated experimentally in vivo, is that E2F-responsive promoters should be more active in tumor cells relative to normal cells because of an excess of “free” E2F and loss of pRB/E2F represser complexes. We demonstrate that adenoviral vectors that contain transgenes driven by the E2F-1 promoter can mediate tumor-selective gene expression in vivo, allowing for eradication of established gliomas with significantly less normal tissue toxicity than seen with standard adenoviral vectors. Our data indicate that de-repression of the E2F-1 promoter occurs in cancer cells in vivo, a finding that can be exploited to design viral vectors that mediate tumor-selective gene expression.
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