An interaction between penton base and αv integrins plays a minimal role in adenovirus-mediated gene transfer to hepatocytes in vitro and in vivo

被引:21
作者
Hautala, T
Grunst, T
Fabrega, A
Freimuth, P
Welsh, MJ
机构
[1] Univ Iowa, Coll Med, Howard Hughes Med Inst, Dept Internal Med, Iowa City, IA 52242 USA
[2] Univ Iowa, Coll Med, Howard Hughes Med Inst, Dept Physiol & Biophys, Iowa City, IA 52242 USA
[3] Univ Iowa, Coll Med, Dept Surg, Iowa City, IA 52242 USA
[4] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA
关键词
adenovirus; hepatocytes; gene transfer; integrin; liver;
D O I
10.1038/sj.gt.3300722
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Studies in cultured cell lines have shown that adenovirus infection involves binding of adenovirus fiber to ifs cell sur: face receptor and binding of penton base to cuv integrins. However, much less is known about the role of these interactions in cells that are targets for adenovirus-mediated gene transfer Earlier work showed that hepatocytes are readily infected by adenovirus, making them an attractive target for gene therapy in several diseases. We found that addition of fiber protein blocked adenovirus infection of primary cultures of hepatocytes. This suggests an important role for fiber and its receptor. However, mutation of the integrin-binding motif in penton base did not inhibit infection of hepatocytes, even though the mutation impaired infection of HeLa cells. Hepatocytes had undetectable amounts of alpha V integrins an heir cell surface and showed. no specific adherence to vitronectin, the natural substrate of alpha V integrins. Adenovirus with an intact penton base enhanced infection of liver following intravenous injection, but only by three-fold as compared with virus in which the integrin-binding motif was disrupted. These studies suggest that interactions between cell surface integrins and penton base are not required for adenovirus infection of hepatocytes in vitro, but the interaction enhances infection to a small degree in vivo.
引用
收藏
页码:1259 / 1264
页数:6
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