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Pulsed ultrafiltration mass spectrometry: a new method for screening combinatorial libraries
R B van Breemen1, C R Huang, D Nikolic
1Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago 60612-7231, USA.
Analytical Chemistry
|June 1, 1997
Summary
Pulsed ultrafiltration mass spectrometry rapidly screens combinatorial libraries for drug discovery. This method identifies solution-phase ligands binding to receptors, enabling efficient lead compound discovery.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Drug Discovery
Background:
- Drug discovery requires rapid screening of large compound libraries.
- Identifying specific ligand-receptor interactions in solution is challenging.
Purpose of the Study:
- To develop a method for identifying solution-phase ligands that bind to receptors within combinatorial libraries.
- To establish an on-line system combining ultrafiltration and electrospray mass spectrometry for this purpose.
Main Methods:
- Developed pulsed ultrafiltration mass spectrometry (PUFS-MS).
- Bound ligands to macromolecular receptors (e.g., human serum albumin).
- Purified complexes via ultrafiltration, dissociated ligands with methanol, and detected via electrospray mass spectrometry.
Main Results:
- Successfully identified ligands with dissociation constants in the micromolar to nanomolar range.
- Demonstrated reuse of receptors through repetitive bind-and-release experiments.
- Validated the method with known ligand-receptor pairs, including drug candidates.
Conclusions:
- Pulsed ultrafiltration mass spectrometry is a powerful new tool for screening combinatorial libraries.
- This method supports efficient lead compound identification in drug discovery.
- The system offers a simple and reusable approach for analyzing molecular interactions.