Abstract
Background: Effective bioanalytical support for pharmacokinetic assessment of therapeutics in early development remains challenging. Concurrent evaluation of multiple candidates per program is typical, requiring efficient characterization in various preclinical species; an ambitious effort often complicated by assay reagent unavailability and limited sample volume. Accordingly, a universal anti-human Fc assay for human monoclonal antibody and derived therapeutics was developed using a microfluidics platform to address these bioanalytical challenges. Results: The universal assay with standardized format was qualified for quantitation of human IgG Fc-containing biotherapeutics in matrices from commonly used preclinical species. Results from this assay compared well with those from traditional colorimetric immunoassays. Furthermore, result comparison between the universal and target-specific assays provided additional information on the effect of antidrug antibodies and in vivo drug catabolism. Conclusion: This assay has wide applicability as a default bioanalytical approach in therapeutic candidate selection and preliminary pharmacokinetics evaluation during early-stage therapeutic development.
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