AAV Vector Quality Control: Going the Extra Mile with NGS
Type
Blog Post
... DNA and processed the mixed sample in our pipeline (see Figure 2, sample 2). When we blindly analyzed...these known impurities, as was the case for clean sample AAV-44362. In addition to these expected hits, ...to “random” genes. Do these hits always mean the sample is contaminated? No - what really matters is the...of hits to the same sequence (gene). In a clean sample, there are typically fewer than 10 hits to a given...>100 hits - immediately raises a red flag. For example, AAV-68544 contained 220 hits to the CHRM4 gene...proceed to de novo assembly of the unmapped reads, employing our bioinformatics software to assemble the reads... the contaminant we mixed into the original AAV sample at 5%. Detecting 5% contamination is a good start...