Retargeting FX-binding-ablated HAdV-5 to vascular cells by inclusion of the RGD-4C peptide in hexon hypervariable region 7 and the HI loop.

Retargeting FX-binding-ablated HAdV-5 to vascular cells by inclusion of the RGD-4C peptide in hexon hypervariable region 7 and the HI loop.
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DOI:
10.1099/jgv.0.000505
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发表时间:
2016-08
期刊:
The Journal of general virology
影响因子:
--
通讯作者:
Baker AH
Baker AH
中科院分区:
其他
文献类型:
--
作者:
Robertson S;Parker AL;Clarke C;Duffy MR;Alba R;Nicklin SA;Baker AH

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最近的研究已经引起了对人腺病毒血清型5(HAdV-5)六邻体:因子X(FX)结合以及随后的肝细胞转导和与免疫系统相互作用的功能的兴趣。在这里,我们通过用RGD-4C替换六邻体HVR 7中的氨基酸或将肽插入纤维HI环中来重新靶向腺病毒血清型5载体,消除FX相互作用。衣壳中的这些遗传修饰与病毒组装相容,并且可以通过αvβ3/5整联蛋白介导的途径有效地重新靶向载体转导,但不会改变预先存在的人中和抗HAdV-5抗体或小鼠血清中天然抗体的免疫识别。因此,FX结合消融的HAdV-5可以被重新靶向,但对免疫介导的攻击保持敏感。这些发现进一步完善了用于人类基因治疗的基于HAdV-5的载体,并为未来的载体开发提供了信息。
Recent studies have generated interest in the function of human adenovirus serotype 5 (HAdV-5) hexon:  factor X (FX) binding and subsequent hepatocyte transduction and interaction with the immune system. Here, we retargeted adenovirus serotype 5 vectors, ablated for FX interaction, by replacing amino acids in hexon HVR7 with RGD-4C or inserting the peptide into the fibre HI loop. These genetic modifications in the capsid were compatible with virus assembly, and could efficiently retarget transduction of the vector via the αvβ3/5 integrin-mediated pathway, but did not alter immune recognition by pre-existing human neutralizing anti-HAdV-5 antibodies or by natural antibodies in mouse serum. Thus, FX-binding-ablated HAdV-5 can be retargeted but remain sensitive to immune-mediated attack. These findings further refine HAdV-5-based vectors for human gene therapy and inform future vector development.
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