Development of PEGylated adenovirus vector with targeting ligand.
For effective gene therapy, a vector system that transduces the therapeutic gene into target cells efficiently and safely is essential. Adenovirus (Ad) vectors frequently are used for gene therapy research, especially cancer gene therapy, because of their high transduction efficiency. However, broad clinical utility of Ad vectors have not yet been achieved owing to problems related to several properties inherent to Ads. Systemic administration of Ad vectors leads to acute virus accumulation and undesirable transgene expression in the liver, with subsequent inefficient systemic cancer-targeted therapy and pronounced hepatotoxicity. Furthermore, most people have Ad-neutralizing antibodies, which hamper gene expression efficiency. Chemical conjugation of Ad surface with polyethylene glycol (PEG) (PEGylation) is one of the promising strategies to overcome these problems. Furthermore, PEGylation of Ad vectors with targeting ligands on the tip of PEG, which alter the transfection range of Ad vectors will improve the safety and efficiency of Ad gene-delivery vectors. In this review, we describe the molecular biology of Ads and outline this PEGylation approach including our data.
Eto
Yusuke
Y
Department of Biotechnology and Therapeutics, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
Yoshioka
Yasuo
Y
Mukai
Yohei
Y
Okada
Naoki
N
Nakagawa
Shinsaku
S
D000256:Adenoviridae / Q000235:genetics* / Q000378:metabolism; D000818:Animals; D005786:Gene Expression Regulation; D018014:Gene Transfer Techniques; D015316:Genetic Therapy / Q000379:methods; D005822:Genetic Vectors; D006801:Humans; D008024:Ligands; D011092:Polyethylene Glycols / Q000737:chemistry
D008024:Ligands; D011092:Polyethylene Glycols