Antisense oligonucleotides (ASOs) have been conjugated to various moieties, such as peptides, antibodies or Fab regions of antibodies, to enhance their delivery to target tissues. The quantitation of free ASO (ASO payload) is critical to characterize its pharmacokinetics/pharmacodynamics (PK/PD) properties and biodistribution after delivery of the peptide/antibody/Fab ASO conjugates.
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Jiang et al. (2024) studied this question.
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