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dc.contributor.authorTang, Qiushi
dc.contributor.authorKeeler, Allison M.
dc.contributor.authorZhang, Songbo
dc.contributor.authorSu, Qin
dc.contributor.authorLyu, Zhuoyao
dc.contributor.authorCheng, Yangfan
dc.contributor.authorGao, Guangping
dc.contributor.authorFlotte, Terence R.
dc.date2022-08-11T08:09:57.000
dc.date.accessioned2022-08-23T16:50:07Z
dc.date.available2022-08-23T16:50:07Z
dc.date.issued2020-10-16
dc.date.submitted2020-11-24
dc.identifier.citation<p>Tang Q, Keeler AM, Zhang S, Su Q, Lyu Z, Cheng Y, Gao G, Flotte TR. Two-Plasmid Packaging System for Recombinant Adeno-Associated Virus. Biores Open Access. 2020 Oct 16;9(1):219-228. doi: 10.1089/biores.2020.0031. PMID: 33117614; PMCID: PMC7590824. <a href="https://doi.org/10.1089/biores.2020.0031">Link to article on publisher's site</a></p>
dc.identifier.issn2164-7844 (Linking)
dc.identifier.doi10.1089/biores.2020.0031
dc.identifier.pmid33117614
dc.identifier.urihttp://hdl.handle.net/20.500.14038/41597
dc.description.abstractA number of packaging systems are available for production of recombinant adeno-associated virus vectors (rAAVs). Among these, the use of a two-plasmid cotransfection system, in which Rep and Cap genes and Ad helper genes are on the same plasmid, has not been frequently employed for good manufacturing practices (GMP) production, even though it presents some practical advantages over the common three-plasmid (triple) transfection method. To confirm and expand the utility of the two-plasmid system, we generated GMP-compatible versions of this system and used those package reporter genes in multiple capsid variants in direct comparison with triple transfection. Vector yields, purity, and empty-to-full ratios were comparable between double and triple transfection methods for all capsid variants tested. We performed an in vivo side-by-side comparison of double and triple transfection vectors following both intravenous injection and intramuscular injection in mice. Expression and transduction were evaluated in muscle and liver 4 weeks after injection. Additional studies of bioactivity were conducted in vivo using packaged vectors carrying a variety of cargos, including the therapeutic transgene, microRNA, and single- or double-stranded vector. Results showed that cargos packaged using double transfection were equivalently bioactive to those packaged using a triple transfection system. In conclusion, these data suggest the utility of midrange (1E12-1E16) GMP-compatible packaging of adeno-associated virus (AAV) vectors for several AAV capsids.
dc.language.isoen_US
dc.relation<p><a href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&list_uids=33117614&dopt=Abstract">Link to Article in PubMed</a></p>
dc.rightsCopyright Qiushi Tang et al., 2020; Published by Mary Ann Liebert, Inc. This Open Access article is distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAAV
dc.subjectgene expression
dc.subjectgene therapy
dc.subjectgene transfer
dc.subjectplasmids
dc.subjectviral vectors
dc.subjectGenetics and Genomics
dc.subjectMicrobiology
dc.subjectTherapeutics
dc.subjectViruses
dc.titleTwo-Plasmid Packaging System for Recombinant Adeno-Associated Virus
dc.typeJournal Article
dc.source.journaltitleBioResearch open access
dc.source.volume9
dc.source.issue1
dc.identifier.legacyfulltexthttps://escholarship.umassmed.edu/cgi/viewcontent.cgi?article=5415&amp;context=oapubs&amp;unstamped=1
dc.identifier.legacycoverpagehttps://escholarship.umassmed.edu/oapubs/4386
dc.identifier.contextkey20290503
refterms.dateFOA2022-08-23T16:50:07Z
html.description.abstract<p>A number of packaging systems are available for production of recombinant adeno-associated virus vectors (rAAVs). Among these, the use of a two-plasmid cotransfection system, in which Rep and Cap genes and Ad helper genes are on the same plasmid, has not been frequently employed for good manufacturing practices (GMP) production, even though it presents some practical advantages over the common three-plasmid (triple) transfection method. To confirm and expand the utility of the two-plasmid system, we generated GMP-compatible versions of this system and used those package reporter genes in multiple capsid variants in direct comparison with triple transfection. Vector yields, purity, and empty-to-full ratios were comparable between double and triple transfection methods for all capsid variants tested. We performed an in vivo side-by-side comparison of double and triple transfection vectors following both intravenous injection and intramuscular injection in mice. Expression and transduction were evaluated in muscle and liver 4 weeks after injection. Additional studies of bioactivity were conducted in vivo using packaged vectors carrying a variety of cargos, including the therapeutic transgene, microRNA, and single- or double-stranded vector. Results showed that cargos packaged using double transfection were equivalently bioactive to those packaged using a triple transfection system. In conclusion, these data suggest the utility of midrange (1E12-1E16) GMP-compatible packaging of adeno-associated virus (AAV) vectors for several AAV capsids.</p>
dc.identifier.submissionpathoapubs/4386
dc.contributor.departmentDepartment of Microbiology and Physiology Systems
dc.contributor.departmentVector Core
dc.contributor.departmentHorae Gene Therapy Center
dc.contributor.departmentDepartment of Pediatrics
dc.source.pages219-228


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Copyright Qiushi Tang et al., 2020; Published by Mary Ann Liebert, Inc. This Open Access article is distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as Copyright Qiushi Tang et al., 2020; Published by Mary Ann Liebert, Inc. This Open Access article is distributed under the terms of the Creative Commons License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.