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Trans-splicing vectors expand the utility of adeno-associated virus for gene therapy
Journal article   Open access   Peer reviewed

Trans-splicing vectors expand the utility of adeno-associated virus for gene therapy

Ziying Yan, Yulong Zhang, Dongsheng Duan and John F Engelhardt
Proceedings of the National Academy of Sciences - PNAS, Vol.97(12), pp.6716-6721
From the Cover
06/06/2000
DOI: 10.1073/pnas.97.12.6716
PMCID: PMC18714
PMID: 10841568
url
https://doi.org/10.1073/pnas.97.12.6716View
Published (Version of record) Open Access

Abstract

Adeno-associated viral (AAV) vectors have demonstrated considerable promise for gene therapy of inherited diseases. However, with a packaging size of <5 kb, applications have been limited to relatively small disease genes. Based on the finding that AAV genomes undergo intermolecular circular concatamerization after transduction in muscle, we have developed a paradigm to increase the size of delivered transgenes with this vector through trans-splicing between two independent vectors coadministered to the same tissue. When two vectors encoding either the 5′ or 3′ portions of the erythropoietin genomic locus were used, functional erythropoietin protein was expressed in muscle subsequent to the formation of intermolecular circular concatamers in a head-to-tail orientation through trans-splicing between these two independent vector genomes. These findings will allow for the application of AAV technologies to a wider variety of diseases for which therapeutic transgenes exceed the packaging limitation of present AAV vectors.
Biological Sciences

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