Electrodynamic Field Active Transport for Charged Molecules
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Solution Overview
Problem
Conventional methods for transporting molecules into, within, and from matrices, such as biological systems, are often slow and inefficient, particularly for thick tissues, where passive diffusion is impractically slow and can cause tissue deformation due to the stress of directed molecular movement.
Innovation Solution
The use of electric fields, specifically electrodynamic fields with stochastic properties, to facilitate the active transport of charged molecules through matrices, utilizing electrophoretic random walk mechanisms that minimize tissue deformation while achieving rapid and uniform distribution of molecules, such as antibodies and detergents, within whole tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If passive diffusion is used to transport molecules into thick tissues, then the process is simple and requires no external force, but the transport rate is impractically slow
Solution Approach 1:
The patent replaces passive diffusion (random thermal motion) with electrophoretic transport using electric fields. Charged molecules are moved through tissues by applying controlled electric fields, substituting the slow random walk mechanism with directed electrophoretic migration that achieves much faster transport rates while maintaining simplicity of the overall system
Solution Approach 2:
The patent changes the transport mechanism by introducing electric field parameters (field strength, duration, waveform) to control molecular movement. By adjusting these electrical parameters, the transport rate can be optimized to achieve rapid and uniform distribution of molecules throughout thick tissues without mechanical intervention
2Speed
If active transport with directed force is applied to move molecules rapidly, then the transport speed increases, but tissue deformation occurs due to stress
Solution Approach 1:
The patent employs dynamic electric field application where the field strength, direction, and timing are adjusted during the transport process. This dynamic control allows molecules to be moved rapidly through tissues while the field parameters are modulated to prevent accumulation of stress that would cause tissue deformation, maintaining structural integrity throughout the process
Solution Approach 2:
The patent uses periodic or pulsed electric field application rather than continuous forcing. By applying fields in controlled cycles with appropriate intervals, molecules are transported efficiently while the tissue is given time to relax between pulses, preventing cumulative stress and deformation of the tissue structure
3Productivity
If conventional transport methods are used, then the process maintains tissue integrity, but the distribution uniformity is poor and efficiency is low
Solution Approach 1:
The patent creates a multi-functional electric field system that simultaneously achieves rapid transport, uniform distribution, and tissue preservation. The electric field serves multiple purposes: driving molecular movement, ensuring even distribution throughout the tissue volume, and maintaining tissue integrity through controlled parameter adjustment, thereby resolving the trade-off between efficiency and precision
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 significantly enhances the diffusion rate of molecules, achieving four orders of magnitude increase in diffusivity and enabling rapid optical clearing and molecular phenotyping of thick tissues like whole mouse brains, while maintaining tissue integrity by distributing molecules uniformly and avoiding deformation.
Implementation Method 1
driving a molecule through at least a portion of a charged matrix, using an electric field
Implementation Method 2
driving a molecule through at least a portion of a matrix using an electrodynamic field
Implementation Method 3
at least a portion of the chamber is defined by a semipermeable material
Data Source
AI summary
Articles and methods for the active transport of molecules into, within, and/or from a matrix are generally described. In some embodiments, an electric field may be used to alter the position of the molecule with respect to the matrix. The electric field may be used to move the molecule to a new location within the matrix, remove the molecule from the matrix, or infuse the molecule into the matrix. For instance, the electric field may be used to move a molecule having a binding partner within the matrix into or away from the vicinity of the binding partner. In some embodiments, the position of the molecule may be altered by exposing the molecule to an electrodynamic field. In some such embodiments, the molecule exposed to the dynamic electric field may have enhanced mobility and minimal adverse matrix interactions relative to conventional molecular transport methods, and in some cases, a molecule exposed to an electrostatic field. The active transport methods and articles, described herein, may be particularly well-suited for a variety of applications including histological, biological, and pharmaceutical applications.