Adenovirus-host interactions and in vivo virus targeting

腺病毒是用于人类治疗应用的有前景的载体。撞击 Ad突变体的深刻表型之间的差异，在 单个衣壳蛋白，以及我们无法选择性地靶向肿瘤细胞后， 血管内病毒递送强调了 分子途径，当病毒通过血管内递送时， 路线这项建议是进行全面的机制研究，以界定 Ad衣壳的每个主要结构元件在介导病毒 与体内肝细胞的相互作用。利用一大堆先前构建的衣壳- 修改的Ad载体，我们将分析1）纤维结构的作用; 2）五邻体-宿主 整合素相互作用; 3）六邻体-血液因子相互作用介导Ad捕获 在血管内Ad递送后的肝脏和肝细胞转导中。基于 4）构建肺癌细胞靶向性溶瘤腺病毒载体 并在小鼠模型中评估其抗肿瘤功效。 这些研究将极大地提高我们的理解的机制， 在体内的广告-宿主相互作用，并最终导致临床上有用的发展， 靶向Ad载体治疗局限性和播散性转移性肿瘤 疾病

Adenoviruses are promising vectors for therapeutic applications in humans. The striking discrepancy between profound phenotypes of Ad mutants, possessing modifications in individual capsid proteins, and our inability to selectively target tumor cells after intravascular virus delivery underscores poorly appreciated redundancy and overlap of molecular pathways, which become engaged when virus is delivered via intravascular route. This proposal is to conduct comprehensive mechanistic studies to define the contribution of each of the major structural elements of the Ad capsid in mediating virus interaction with liver cells in vivo. Using a large set of previously constructed capsid- modified Ad vectors, we will analyze the role of 1) the fiber structure; 2) the penton-host integrin interactions; and 3) the hexon-blood factor interactions in mediating Ad trapping in the liver and hepatocyte transduction after intravascular Ad delivery. Based on the accumulated data we will 4) construct a lung carcinoma cell-targeted oncolytic Ad vector that escapes trapping by the liver and evaluate its anti-tumor efficacy in a mouse model. These studies will dramatically improve our understanding of the mechanisms governing Ad-host interactions in vivo and will ultimately lead to the development of clinically useful targeted Ad vectors for the therapy of localized and disseminated metastatic tumor diseases.