Magneto-Responsive Substrate for Complex Cell Strain Control
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Solution Overview
Problem
Current mechanical-stimulation systems for biological materials are limited to simple deformation modes, require invasive contact, and struggle to reproduce and control complex, dynamic strain patterns, especially in scenarios like traumatic brain injury and pathological scarring, lacking non-invasive and real-time control.
Innovation Solution
A magneto-mechanical stimulation system using a magneto-responsive substrate with embedded magnetic particles and a magnetic stimulation device to apply external magnetic fields, allowing non-invasive, real-time control of complex strain patterns by varying stiffness and deformation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct mechanical loading is applied to polymeric substrates for cell culture, then mechanical stimuli can be delivered to biological materials, but the system is limited to simple deformation modes and requires invasive contact that risks contamination and local damage
Solution Approach 1:
The patent replaces direct mechanical loading systems with a magnetic field-based actuation system. Magneto-responsive particles embedded in the substrate are activated by external magnetic fields, generating mechanical forces indirectly without physical contact. This substitution enables non-invasive operation while maintaining complex deformation control through magnetic field programming.
Solution Approach 2:
The patent introduces magneto-responsive particles as an intermediary between the magnetic field and the biological material. These particles act as a mediator that converts magnetic field energy into mechanical deformation, allowing non-contact actuation while transmitting controlled strain patterns to the substrate and cultured cells.
2Ease of operation
If magneto-responsive substrates are used to support cells, then non-invasive stimulation is possible, but control is limited to overall stiffness changes and different deformation modes cannot be controlled
Solution Approach 1:
The patent segments the magnetic actuation system into multiple independently controllable magnetic sources arranged in different spatial configurations. Each magnetic source can be activated separately to generate specific strain patterns, enabling control over various deformation modes (tension, compression, shear, torsion) while maintaining non-invasive operation through external magnetic fields.
Solution Approach 2:
The patent implements dynamic control of magnetic field parameters including strength, direction, and temporal variation. By programmatically adjusting magnetic field characteristics in real-time, the system can dynamically switch between different deformation modes and simulate complex mechanical scenarios such as impact loading or cyclic loading patterns.
3Ease of operation
If photo-activated changes in material properties are used for non-direct contact stimulation, then invasive contact is avoided, but penetration depth of visible light in material and surrounding medium is limited
Solution Approach 1:
The patent substitutes optical actuation (photo-activated changes) with magnetic field actuation. Magnetic fields penetrate biological materials and surrounding media much more effectively than visible light, eliminating the penetration depth limitation while maintaining non-invasive operation. The magneto-responsive particles respond to magnetic fields regardless of tissue depth.
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
Enables non-invasive, real-time generation and control of complex strain patterns, facilitating the study of mechanobiological processes under dynamic deformation states, such as traumatic brain injury and pathological scarring, by simulating physiological scenarios and providing insights into mechanistic-mediated biological processes.
Implementation Method 1
The substrate comprises a polymeric matrix with embedded magnetic particles... When imposing an external magnetic field, the particles magnetize leading to internal forces in the form of dipole-dipole interactions. These forces are transmitted to the polymeric matrix leading to mechanical deformation
Implementation Method 2
When imposing an external magnetic field, the particles magnetize leading to internal forces in the form of dipole-dipole interactions
Implementation Method 3
The magnetic stimulation device is configured to generate a complex strain pattern on the biological material by generating a magnetic field which acts over the magneto-responsive substrate
Data Source
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AI summary
Method for generating and controlling complex strain patterns on biological materials comprising the steps of providing a magnetic stimulation device and a magneto-responsive substrate; culturing biological material in the substrate; determining the position of the magnetic stimulation device for obtaining a defined strain pattern on the biological material; placing the magnets in the position determined; and activating a magnetic stimulation device to generate a complex strain pattern in the magneto-responsive substrate and consequently in the biological material; and magneto-mechanical stimulation system comprising a magneto-responsive substrate configured to hold biological material; a holder for placing the magneto-responsive substrate; a magnetic stimulation device configured to generate a complex strain pattern on the biological material by generating a magnetic field which acts over the magneto-responsive substrate; a computing module; an imaging module for long-term monitoring; and an interface module for performing the steps of the method.