Rescue of Adeno-Associated Virus Production by shRNA Cotransfection
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Author/Creator ORCID
Date
2020-10-16
Type of Work
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Citation of Original Publication
Guimaro MC, Afione SA, Tanaka T, Chiorini JA. Rescue of Adeno-Associated Virus Production by shRNA Cotransfection. Hum Gene Ther. 2020;31(19-20):1068-1073. doi:10.1089/hum.2019.249
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract
Adeno-associated virus (AAV) vector technology is rapidly advancing and becoming not only the leading vector platform in the field of gene therapy but also a useful tool for functional genomic studies of novel proteins. As most vectors
utilize constitutive promoters, this results in transgene expression during production. Depending on the transgene
product, this could induce proapoptotic, cytostatic, or other unknown effects that interfere with producer cell function
and, therefore, reduce viral vector yield. This can be a major limitation when trying to characterize poorly described
genes. We describe the novel use of shRNA encoding plasmids cotransfected during packaging to limit the expression
of the cytotoxic transgene product. This allowed the production of an otherwise unpackageable vector. The approach is
simple, versatile, does not require modification of the vector plasmid, and should be easily adaptable to almost any
transgene with minimal cost.