Nanocrystal Activation Platform for Cellular Potential Monitoring
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Solution Overview
Problem
Current methods for high-throughput screening of ion channels are limited by low throughput, low sensitivity, and high rates of false negatives and false positives, and lack the ability to effectively monitor and manipulate transmembrane potentials in cells.
Innovation Solution
The use of nanocrystal-based activation platforms, comprising multiple layers of immobilized nanocrystals covered by an adhesion substrate, which allow for optical stimulation and emission detection to correlate with changes in transmembrane potentials, enabling non-invasive monitoring and manipulation of cellular membrane potentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional patch clamp method is used to study ion channels, then detailed biophysical characterization can be achieved, but throughput is low and ease of use is unsatisfactory for mass screening
Solution Approach 1:
The patent replaces the mechanical patch clamp system with an optical sensing system using fluorescent indicators and microscopy. This substitution enables non-contact measurement of membrane potential changes through fluorescence intensity detection, eliminating the need for physical sealing and manual manipulation while maintaining measurement precision and enabling high-throughput screening
Solution Approach 2:
The patent uses fluorescent dyes and indicators that create optical copies of electrical signals. Instead of directly measuring current through a patch clamp, the system converts electrical membrane potential changes into fluorescent signal copies that can be detected optically, allowing simultaneous measurement of multiple cells in parallel
2Loss of information
If traditional ion channel screening methods are used, then some functional information can be obtained, but false negatives and false positives rates are high
Solution Approach 1:
The patent implements feedback mechanisms where cells are stimulated with test compounds and the resulting membrane potential changes are monitored in real-time. The optical signals provide continuous feedback on channel activity, allowing for accurate determination of compound effects and reducing false results through dynamic monitoring rather than static measurements
Solution Approach 2:
The patent changes the measurement parameter from direct current measurement to fluorescent signal intensity. This parameter transformation enables more reliable detection of channel activity through optical signals that are less susceptible to artifacts and interference, improving the reliability of screening results
3Power
If patch clamp instrumentation is used, then ion channel currents can be measured, but repeated stimulation to generate action potentials in a physiologically relevant manner is not allowed
Solution Approach 1:
The patent enables periodic optical stimulation of cells using light sources that can be activated in repeated cycles. This periodic optical stimulation allows generation of action potentials through light-induced ion channel activation, providing physiologically relevant repeated stimulation capability that was not possible with traditional patch clamp instrumentation
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 provides high sensitivity, high temporal resolution, and low rates of false results, allowing for effective monitoring and manipulation of transmembrane potentials, suitable for drug discovery and understanding cellular function and communication.
Implementation Method 1
nanoparticles and their use in monitoring and manipulating transmembrane voltages
Implementation Method 2
assaying emission from the activation platform; and correlating the emission with the change in transmembrane potential
Data Source
AI summary
The use of nanostructures to monitor or modulate changes in cellular membrane potentials is disclosed.