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High-throughput solution-based medicinal library screening against human serum albumin
Jimmy Flarakos1, Kenneth L Morand, Paul Vouros
1Barnett Institute and Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, USA.
Analytical Chemistry
|March 1, 2005
Summary
A new high-throughput screening method uses size exclusion chromatography, 2D liquid chromatography, and mass spectrometry to rapidly assess drug candidate binding to human serum albumin (HSA). This technique efficiently ranks ligands by relative binding affinity in under six minutes.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Pharmacology
Background:
- High-throughput screening (HTS) has shifted towards focused libraries, necessitating rapid, cost-effective screening technologies.
- Existing methods struggle to efficiently screen diverse and focused compound libraries.
Purpose of the Study:
- To develop a high-throughput, solution-based method for determining relative drug candidate binding affinities to human serum albumin (HSA).
- To enable rapid screening of both diverse and focused compound libraries.
Main Methods:
- A novel method combining size exclusion chromatography (SEC), two-dimensional liquid chromatography (2-D LC), and mass spectrometry (MS).
- Utilized multiple reaction monitoring (MRM) to compare chromatographic profiles before and after incubation with HSA.
- Evaluated performance using diverse ligands and a focused beta-lactam library.
Main Results:
- The method successfully ranked ligands based on their relative binding affinities to HSA.
- Rankings closely correlated with established association constants from literature.
- Demonstrated ability to distinguish site-specific drug interactions with HSA domains.
- Screening of combinatorial mixtures completed in under 6 minutes.
Conclusions:
- The developed SEC-2D LC-MS methodology provides a simple, rapid, and robust approach for screening drug candidates.
- This technique is effective for analyzing relative binding affinities in both diverse and focused medicinal libraries.
- Offers a valuable tool for drug discovery and development by enabling efficient assessment of ligand-receptor interactions.