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Capillary electrophoretic study of the complex formation between DNA and cationic surfactants
J C Jacquier1, A V Gorelov, D M McLoughlin
1Irish Centre for Colloid Science and Biomaterials, Department of Chemistry, University College Dublin, Ireland.
Journal of Chromatography. A
|October 9, 1998
Summary
This study explores DNA complex formation with quaternary ammonium detergents using capillary zone electrophoresis (CZE). CZE precisely monitors DNA mobility changes, aiding genetic delivery system development.
Area of Science:
- Biophysical Chemistry
- Molecular Biology
- Materials Science
Background:
- Cationic surfactants are increasingly used in liposomal genetic delivery systems.
- Understanding DNA-surfactant complex formation is crucial for optimizing these systems.
Purpose of the Study:
- To investigate the complex formation between DNA and quaternary ammonium detergents.
- To evaluate capillary zone electrophoresis (CZE) for monitoring DNA-surfactant interactions and hydrodynamic changes.
Main Methods:
- Utilized capillary zone electrophoresis (CZE) with suppressed electroosmotic flow.
- Precisely monitored changes in DNA mobility as a function of surfactant concentration.
- Assessed CZE's ability to reflect alterations in hydrodynamic friction upon binding.
Main Results:
- CZE effectively monitored DNA mobility changes and binding.
- Peak splitting observed in CZE near the binding half-point indicates caution for cooperative binding studies.
- Experimental findings were compared with polyelectrolyte theories.
Conclusions:
- CZE is a valuable tool for studying DNA-surfactant complexation and its impact on DNA mobility.
- Careful application of CZE is necessary for systems exhibiting strong binding cooperativity.
- The study provides insights into DNA-surfactant interactions relevant to genetic delivery technologies.