High-throughput screening for viral vectors
The SCOUT® technology provides for an effective tool for “Design-of-Experiments” (DoE) approaches. It uses a miniaturized production and purification platform to rapidly develop multivariate processes.Our SCOUT® technology has been successfully used to substantially increase cell density of diverse viral vector packaging cell lines, resulting in increased vector yields. The SCOUT® technology has also been used to rapidly optimize important vector production parameters, such as best time of harvest, optimal multiplicity of infection (MOI), and optimal genome packaging in culture.
Protocols
To deploy our SCOUT® technology, we have developed optimized protocols for diverse (packaging) cell lines for growth in mini bioreactors, including modified and parental HEK293 cells (for AAV, adenoviral and lentiviral vectors), and Vero cells (for measles and VSV vectors). As such, we have developed standard upstream processes for different vector systems, which we use as starting point to develop a more product-specific process.
For instance, for adenoviral vectors we are keenly aware of, and able to exploit the differences between the different serotypes (e.g. human-, rhesus macaque-, chimpanzee-derived) as they can substantially vary in the number of virus particles produced per cell, as well as the ratio of infectious particles versus total virus particles per cell. These parameters also hold true for AAV vectors.
Rapid Assessmen of Vector Yield
We have a panel of GMP-compliant production media that, in conjunction with our SCOUT® system, facilitates the rapid assessment of vector yield under different conditions.
Scalability
One of the great advantages of our SCOUT® technology, in addition to speed, cost-reduction, and versatility, is its scalability. We have shown that optimal upstream parameters identified from our SCOUT® experiments can be seamlessly extrapolated to larger scale bioreactors.
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