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Nano-Differential Scanning Fluorimetry for Screening in Fragment-based Lead Discovery
Published on: May 16, 2021
Fast screening of dendrimer-binding compounds by diffusion NMR techniques.
Naimin Shao1, Xiaoliang Gong, Qun Chen
1Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University, Shanghai, 200241, PR China.
The Journal of Physical Chemistry. B
|May 4, 2012
Summary
Pulsed gradient spin echo Nuclear Magnetic Resonance (PGSE NMR) rapidly screens dendrimer-binding drugs. Cysteine, glutamic acid, aspartic acid, and tryptophan show strong binding to poly(propylene imine) (PPI) dendrimers.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Biochemistry
Background:
- Dendrimer-based drug delivery systems require efficient screening of binding compounds.
- Understanding host-guest interactions is crucial for optimizing dendrimer drug carriers.
Purpose of the Study:
- To develop and validate a high-throughput screening method for identifying dendrimer-binding compounds.
- To investigate the binding affinities and interaction mechanisms of common amino acids with poly(propylene imine) (PPI) dendrimers.
Main Methods:
- Utilized pulsed gradient spin echo (PGSE) Nuclear Magnetic Resonance (NMR) spectroscopy.
- Employed common amino acids as a model screening pool.
- Analyzed changes in diffusion coefficients to quantify binding affinities.
Main Results:
- Identified cysteine, glutamic acid, aspartic acid, and tryptophan as high-affinity binders to PPI dendrimers.
- Differentiated binding mechanisms: tryptophan via hydrophobic interactions, others via ionic/hydrogen bonds.
- Demonstrated PGSE NMR as an effective tool for rapid screening.
Conclusions:
- PGSE NMR facilitates high-throughput screening of dendrimer-binding compounds.
- Provides insights into dendrimer-amino acid interactions, aiding drug delivery system design.
- Advances the study of dendrimer-based host-guest systems.
