Advances in the Purification of Antisense Oligonucleotides

Presented by

Robert Gronke, Ph.D., Senior Principal Scientist, at Biogen and John Cyganowski, Director of Customer Application, Merck

About this talk

Following on the commercial success of Spinraza® (the first successful treatment for patients with spinal muscular atrophy), antisense oligonucleotides (ASO) are now an important part of Biogen’s drug portfolio that enables us to better treat neuromuscular diseases. Development of the ASO process employs orthogonal chromatography to achieve industry high purities while maintaining good yield along with detritylation and UF/DF steps.  This purification platform process is all aqueous based on green chemistry principals that easily fits into our existing biologics manufacturing facilities. To date, we now leverage this ASO platform process to purify 13+ ASO molecules that contain different sequences, chemistries, and most recently incorporating conjugation reactions. Having completed process characterization for our lead ASO candidate, we have achieved a greater understanding of the process, its capabilities to clear process and product related impurities and understand the mechanisms that control the chromatography. On the manufacturing side, Biogen recently completed at scale PPQ validation batches of an ASO clinical candidate.  Cases studies and learnings will be presented on results from characterization studies and PPQ batches.

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