title: Chiral Separation of Uncharged Pomalidomide Enantiomers Using Carboxymethyl-β-Cyclodextrin: A Validated Capillary Electrophoretic Method.
abstract: The racemic mixture of pomalidomide (POM), a second-generation immunomodulatory uncharged drug, was separated into enantiomers by capillary zone electrophoresis for the first time. Seven different chargeable cyclodextrin (CD) derivatives were screened as complexing agents and chiral selectors, investigating the stability of the POM-CD inclusion complexes and their enantiodiscriminating capacities. Based on preliminary experiments, carboxymethyl-β-CD (CM-β-CD) was found to be the most effective chiral selector. Factors influencing enantioseparation were systematically optimized, using an orthogonal experimental design. Optimal parameters (background electrolyte [BGE]: 50 mM Tris-acetate buffer, pH 6.5, containing 15 mM CM-β-CD; capillary temperature: 20°C; voltage applied +15 kV) allowed baseline separation of POM enantiomers with a resolution as high as 4.87. The developed method was validated, in terms of sensitivity (limit of detection and limit of quantification), linearity, accuracy, repeatability, and intermediate precision.
authors.affiliation: Faculty of Pharmacy, University of Medicine and Pharmacy Tîrgu Mureş, Tîrgu Mureş, Romania.
authors.forename: Zoltán-István
authors.initials: ZI
authors.lastname: Szabó
authors.affiliation: Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary.
authors.forename: Levente
authors.initials: L
authors.lastname: Szőcs
authors.affiliation: Faculty of Pharmacy, University of Medicine and Pharmacy Tîrgu Mureş, Tîrgu Mureş, Romania.
authors.forename: Daniela-Lucia
authors.initials: DL
authors.lastname: Muntean
authors.affiliation: Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary.
authors.forename: Béla
authors.initials: B
authors.lastname: NoszáL
authors.affiliation: Department of Pharmaceutical Chemistry, Semmelweis University, Budapest, Hungary.
authors.forename: Gergő
authors.initials: G
authors.lastname: Tóth
mesh_terms: D003505:Cyclodextrins / Q000737:chemistry*; D019075:Electrophoresis, Capillary; D006863:Hydrogen-Ion Concentration; D013237:Stereoisomerism; D013792:Thalidomide / Q000031:analogs & derivatives* / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D003505:Cyclodextrins; D047392:beta-Cyclodextrins; C441457:carboxymethyl-beta-cyclodextrin; D013792:Thalidomide; C467566:pomalidomide
keywords: Imnovid; Pomalyst; capillary zone electrophoresis; experimental design; validation