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Aptamer-based enantioselective competitive binding assay for the trace enantiomer detection
Josephine Ruta1, Corinne Ravelet, Isabelle Baussanne
1Département de Pharmacochimie Moléculaire UMR 5063 CNRS, ICMG FR 2607, Université Joseph Fourier, UFR de Pharmacie de Grenoble, 5, Avenue de Verdun, 38240 Meylan, France.
Analytical Chemistry
|May 22, 2007
Summary
This study introduces a novel aptamer-based assay for highly enantioselective detection of trace impurities. This tool enables precise enantiomer discrimination in chiral compound analysis.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Molecular Biology
Background:
- Enantiomeric impurity determination is crucial for chiral compounds.
- Nucleic acid aptamers offer high enantioselectivity for target discrimination.
- Developing sensitive assays for low-level enantiomeric impurities remains a challenge.
Purpose of the Study:
- To demonstrate the use of aptamers in creating a highly enantioselective tool for trace enantiomer detection.
- To develop a novel aptamer-based stereoselective assay for sensitive impurity analysis.
Main Methods:
- Isolation of enantiomer-discriminating nucleic acid aptamers.
- Development of an affinity capillary electrophoresis-based competitive, homogeneous assay format.
- Implementation of an on-capillary mixing approach for rapid analysis.
Main Results:
- Successful application of aptamers for enantioselective trace enantiomer detection.
- Achieved detection of as low as 0.01% minor enantiomer in nonracemic mixtures.
- Demonstrated short analysis times of less than 5 minutes.
Conclusions:
- Aptamer-based assays are effective tools for highly enantioselective trace enantiomer detection.
- The developed assay provides a sensitive and rapid method for chiral impurity analysis.
- This approach advances the monitoring of enantiomeric composition in chemical and biological samples.
