title: Quantitative capillary gel electrophoresis assay of phosphorothioate oligonucleotides in pharmaceutical formulations.
abstract: Quantitative capillary gel electrophoresis (QCGE) has been developed for the accurate quantitation of a 21-mer phosphorothioate oligonucleotide, ISIS 2922, and its degradation products in an intravitreal formulation. The electrokinetic mode of injection employed by CGE necessitates formulation of the external reference standard in a sample matrix similar to that of the drug product and the use of an internal standard for improved accuracy and precision. The analytical method detailed in this paper has demonstrated the necessary accuracy, precision, linearity, range, selectivity and ruggedness for use in routine drug product analysis and stability monitoring of phosphorothioate oligonucleotides.
authors.affiliation: Development Chemistry Department, Isis Pharmaceuticals, Inc., Carlsbad, CA 92008.
authors.forename: G S
authors.initials: GS
authors.lastname: Srivatsa
authors.forename: M
authors.initials: M
authors.lastname: Batt
authors.forename: J
authors.initials: J
authors.lastname: Schuette
authors.forename: R H
authors.initials: RH
authors.lastname: Carlson
authors.forename: J
authors.initials: J
authors.lastname: Fitchett
authors.forename: C
authors.initials: C
authors.lastname: Lee
authors.forename: D L
authors.initials: DL
authors.lastname: Cole
mesh_terms: D002197:Capillary Action; D004591:Electrophoresis, Polyacrylamide Gel / Q000379:methods* / Q000706:statistics & numerical data; D007700:Kinetics; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011786:Quality Control; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013678:Technology, Pharmaceutical; D013873:Thionucleotides / Q000032:analysis*
chemical_list: D004364:Pharmaceutical Preparations; D013873:Thionucleotides