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Article Abstract
The demand of a plasmid encoding human hepatocyte growth factor gene (pUDK-HGF) in large quantities at high purity and concentration has increased for gene therapy of critical limb ischemia (CLI) in clinical trials. In this article, we produced pUDK-HGF in compliance with current good manufacturing practices at gram scale. The process included a 50-L batch fermentation, continuous alkaline lysis, and integrated three-step chromatography on Sepharose 6 Fast Flow, PlasmidSelect Xtra, and Source 15Q. The production process has been scaled up to yield 4.24 ± 0.41 g of pharmaceutical pUDK-HGF from 1.0 kg bacterial cell paste and the overall yield reached range from 58.37 to 66.70%. The final pUDK-HGF product exhibited high purity with supercoiled percentage of > 95.8% and undetectable residual RNA, contaminated protein, and bacterial endotoxin. The phase I clinical study indicates that intramuscular injection of pUDK-HGF is safe, well tolerated, and may provide symptomatic relief to CLI patients. These results show that our manufacturing process of pUDK-HGF is efficient in producing pharmaceutical-grade plasmid DNA and is safe for clinical applications.
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| http://dx.doi.org/10.1080/10826068.2016.1141302 | DOI Listing |
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