Dynamic Light Scattering for Particle Interaction Screening
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Solution Overview
Problem
Current methods for high-throughput detection of small molecule effectors of particle interactions require large sample quantities and are not suitable for characterizing multiple binding stoichiometries, limiting their applicability in fields like pharmaceutical development and nanotechnology.
Innovation Solution
Dynamic light scattering (DLS) is used to detect changes in hydrodynamic radius and viscosity, enabling high-throughput screening of chemical libraries with low sample requirements and the ability to determine equilibrium association constants and stoichiometry of reversible complexes, while also providing conformational information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional methods are used for high-throughput detection of small molecule effectors, then detection capability is achieved, but large sample quantities are required
Solution Approach 1:
The patent replaces conventional mechanical/physical detection methods with dynamic light scattering (DLS) technology. DLS measures fluctuations in light scattering from particles in solution to determine hydrodynamic radius and interaction characteristics, enabling high-throughput screening with minimal sample consumption (nanoliter scale) while maintaining detection sensitivity and accuracy.
2Adaptability or versatility
If conventional methods are used, then detection is possible, but multiple binding stoichiometries cannot be characterized
Solution Approach 1:
The patent employs dynamic light scattering to measure time-dependent fluctuations in light scattering intensity from particles undergoing Brownian motion. By analyzing the autocorrelation function of these fluctuations, the system dynamically characterizes particle hydrodynamic radius and interaction dynamics, enabling differentiation of multiple binding stoichiometries (1:1, 2:1, 1:2, etc.) based on distinct hydrodynamic signatures without requiring complex static measurements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for efficient identification of small molecule modulators of particle interactions, reduces sample quantity needs, and enables rapid measurement of association constants under various conditions, facilitating the discovery of new drugs and nanotechnology innovations.
Implementation Method 1
Dynamic light scattering provides an excellent analysis method for screening large chemical libraries
Implementation Method 2
Dynamic light scattering uses the measured fluctuations in the light scattered from a sample to determine these quantities
Data Source
AI summary
This invention enables high throughput detection of small molecule effectors of particle association, as well as quantification of association constants, stoichiometry, and conformation. “Particle” refers to any discrete particle, such as a protein, nucleic acid, carbohydrate, liposome, virus, synthesized polymer, nanoparticle, colloid, latex sphere, etc. Given a set of particle solutions having different concentrations, dynamic light scattering measurements are used to determine the average hydrodynamic radius, ravg, as a function of concentration. The series of ravg as a function of concentration are fitted with stoichiometric association models containing the parameters of molar mass, modeled concentrations, and modeled hydrodynamic radii of the associated complexes. In addition to the ravg value analysis, the experimental data may be fit/analyzed in alternate ways. This method may be applied to a single species that is self-associating or to multiple species that are hetero-associating. This method may also be used to characterize and quantify the association between a modulator and the associating species.