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In the rat liver, Adenoviral gene transfer efficiency is comparable to AAV.
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- Author(s): Montenegro-Miranda, P S; Pichard, V; Aubert, D; ten Bloemendaal, L; Duijst, S; de Waart, D R; Ferry, N; Bosma, P J
- Source:
Gene Therapy; Feb2014, Vol. 21 Issue 2, p168-174, 7p, 1 Color Photograph, 1 Chart, 5 Graphs- Subject Terms:
- Source:
- Additional Information
- Abstract: Adenoviral (AdV) and Adenovirus-associated viral (AAV) vectors both are used for in vivo gene therapy of inherited liver disorders, such as Crigler-Najjar syndrome type 1. In a relevant animal model, the Gunn rat, both vectors efficiently correct the severe hyperbilirubinemia characteristic of this liver disorder. Although the clinical use of AAV is more advanced, as demonstrated by the successful phase 1 trial in hemophilia B patients, because of its large cloning capacity AdV remains an attractive option. A direct comparison of the efficacy of these two vectors in the liver in a relevant disease model has not been reported. Aim of this study was to compare the efficiency of clinically applicable doses of both vectors in the Gunn rat. AdV or scAAV (self-complimentary AAV) ferrying identical liver-specific expression cassettes of the therapeutic gene, UGT1A1, were injected into the tail vein. As the titration methods of these two vectors are very different, a comparison based on vector titers is not valid. Therefore, their efficacy was compared by determining the amount of vector genomes delivered to the liver required for therapeutic correction of serum bilirubin. Like AAV, the liver-specific first-generation AdV also provided sustained correction in this relevant disease model. UGT1A1 mRNA expression provided per genome was comparable for both vectors. Flanking the expression cassette in AdV with AAV-ITRs (inverted terminal repeats), increased UGT1A1 mRNA expression eightfold which resulted in a significant improvement of efficacy. Compared with AAV, less AdV genomes were needed for complete correction of hyperbilirubinemia. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Gene Therapy is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Abstract:
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