Strategies for Identity Testing of Therapeutic Oligonucleotide Drug Substances and Drug Products.
2020
A risk-based approach for routine identity testing of therapeutic oligonucleotide drug substances and drug products is described. Risk analysis of solid-phase oligonucleotide synthesis indicates that intact mass measurement is a powerful technique for confirming synthesis of the intended oligonucleotide. Further risk assessment suggests that the addition of a second, sequence-sensitive identity test, which relies on a comparison of some property of the sample to a reference standard of proven identity, results in a sufficient test of identity for most oligonucleotide drug substances and products. Alternative strategies for drug product identity testing are presented. The analysis creates a common way to communicate risk and should result in a harmonized approach to identity testing that avoids the unnecessary analytical burden associated with routine de novo sequencing, without compromising quality or patient safety.
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