4.1.1 Because viruses generally kill their host cells, and contaminating replicating viruses would be an enormous risk in the clinic, viral vector manufacturing methods are focused on providing the ability to replicate transiently and without the possibility of producing any viable virions. AAV is an attractive vector because it cannot self-replicate and is generally considered non-virulent.
Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.
4.2.1 The most commonly used cell lines are derived from HEK293 cells, which are recommended by the FDA due to their reduced risk compared to tumor-derived (e.g., HeLa) cells or cells with transformed phenotypes (e.g., 293T, also known as HEK293T).[79] Cell lines used to produce AAV vectors should also be chosen to reduce product risk from packaged non-AAV DNA. More stringent limitations on the quantity and size of host cell DNA should be established, and additional analyses must be performed to ensure product safety.
Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.
4.3.1 Transfecting multiple plasmids into a single cell for AAV production is tricky because of the relatively low mixing speeds required for HEK cells and the often poor solubility of the transfection reagents.
Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.
4.4.1 Upstream processes are typically product-specific and depend on the gene of interest as well as the specific AAV serotype. The upstream portion of viral vector manufacturing typically takes 3–5 weeks and includes expanding the seed train, inoculating the terminal reactor, and cell culture.[79]
Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.
4.5.1 Harvesting methods for AAV vectors depend on whether they were produced via adherent or suspension cell culture.[93] Adherent cells must first be detached. In both cases, the cells must then be lysed to release the virus, which will be implemented using a sudden pressure drop resulting from microfluidization, cross-flow filtration, or osmotic shock. This process also releases large quantities of host cell proteins (HCPs) and host cell DNA and RNA, as well as partially full capsids and nonencapsulated viral DNA (empty capsids). Nuclease digestion with benzonase is often performed to remove nucleic acid impurities, but then any residual benzonase must be removed, which can be challenging. Detergents and proteases may also be used for purification at this stage.
Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.
4.6.1 Stability studies must be performed according to local and international regulations, including those established in the ICH guidelines (ICH Q1A, ICH Q10, ICH Q5D) and guidance published by the FDA[99] and EMA.[100]
Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.
4.7.1 To circumvent challenges with traditional AAV manufacturing via transient transfection, a few alternate methods have been developed and are becoming common. A summary of these alternate methods of AAV manufacturing is presented in Table 8.
Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.Nice Insight provides customers with the latest trends in the market, hard-to-find pricing, and analysis of important scientific innovation and challenges. Our research reports help innovators understand the price they'll pay for a contractor and what challenges they should anticipate, and allow CDMOs to evaluate their position in the market.