转导(生物物理学)
DNA
细胞生物学
人类免疫缺陷病毒(HIV)
生物
化学
计算生物学
病毒学
遗传学
生物化学
作者
Akiko Eguchi,Teruo Akuta,Hajime Okuyama,Toshiya Senda,Haruhiko Yokoi,Hachiro Inokuchi,Shigeo Fujita,Tetsuo Hayakawa,Katsuo Takeda,Mamoru Hasegawa,Mahito Nakanishi
标识
DOI:10.1074/jbc.m010625200
摘要
The plasma membrane of mammalian cells is one of the tight barriers against gene transfer by synthetic delivery systems. Various agents have been used to facilitate gene transfer by destabilizing the endosomal membrane under acidic conditions, but their utility is limited, especially for gene transfer in vivo. In this article, we report that the protein transduction domain of human immunodeficiency virus type 1 Tat protein (Tat peptide) greatly facilitates gene transfer via membrane destabilization. We constructed recombinant λ phage particles displaying Tat peptide on their surfaces and carrying mammalian marker genes as part of their genomes (Tat-phage). We demonstrate that, when animal cells are briefly exposed to Tat-phage, significant expression of phage marker genes is induced with no harmful effects to the cells. In contrast, recombinant phage displaying other functional peptides, such as the integrin-binding domain or a nuclear localization signal, could not induce detectable marker gene expression. The expression of marker genes induced by Tat-phage is not affected by endosomotropic agents but is partially impaired by inhibitors of caveolae formation. These data suggest that Tat peptide will become a useful component of synthetic delivery vehicles that promote gene transfer independently of the classical endocytic pathway.
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