Acoustic Patterning of Pore-Forming Particles for Tissue Engineering
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Solution Overview
Problem
Existing tissue engineering technologies, such as bio-3D printing, molding, and laser ablation, struggle to accurately replicate the anisotropic structures of tissues like blood vessels due to limitations in cell concentration and physical resolution, making it difficult to efficiently fabricate functional tissues with capillary structures.
Innovation Solution
The method involves aligning cells and pore-forming particles using acoustic waves to create a hydrogel structure with directionally arranged pores, which facilitates cell migration, proliferation, and tissue formation, while also enabling the rapid fabrication of thick tissue units and vascular structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing technologies (bio-3D printing, molding, laser ablation) are used to fabricate tissues, then the fabrication process can be performed, but the physical resolution exceeds 100 micrometers and cell concentration is low, making it impossible to copy capillary structures
Solution Approach 1:
The patent replaces mechanical/chemical fabrication methods (3D printing, molding, laser ablation) with acoustic wave-based patterning. Acoustic waves create standing wave patterns that physically arrange cells and pore-forming particles at precise spacings of tens to hundreds of micrometers, achieving both high resolution and efficiency in tissue fabrication
Solution Approach 2:
The patent changes the fundamental parameter of patterning from mechanical/chemical control to acoustic wave control. By adjusting acoustic wave parameters (frequency, amplitude), the spacing between pores and cells can be precisely controlled at the micro-scale, enabling fabrication of capillary structures that were previously unachievable
2Loss of time
If pores are pre-formed in a specific direction to facilitate cell growth, then tissue fabrication time is reduced, but the complexity of the fabrication process increases
Solution Approach 1:
The patent applies preliminary action by pre-forming pores in a specific directional arrangement before cell infiltration. The acoustic waves create standing wave patterns that pre-position pore-forming particles in the desired spatial configuration, and these pores are then used to guide cell migration and tissue formation, significantly reducing the time needed for subsequent tissue regeneration
Solution Approach 2:
The patent replaces complex mechanical pore formation systems with acoustic wave-based patterning. The acoustic waves automatically create the directional pore arrangement through standing wave patterns, eliminating the need for complex mechanical molding or 3D printing systems while achieving the same functional outcome
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 the rapid and efficient fabrication of tissues with aligned structures, such as blood vessels, by creating a conducive environment for cell growth and tissue regeneration, significantly reducing the time required for tissue formation compared to traditional methods.
Implementation Method 1
applying an acoustic wave in one or more directions to the liquid hydrogel with which the cells and the pore-forming particles have been mixed, thereby aligning the cells and the pore-forming particles with each other
Implementation Method 2
When the surface acoustic waves are used to generate standing waves in a solution containing high-concentration cells, the cells move to nodes arranged at spacings of 100 micrometers
Data Source
AI summary
Disclosed is a method of applying a three-dimensional acoustic wave to cells and pore-forming particles similar in size to cells contained in a hydrogel to perform the micro-sized patterning thereof, and then melting the particles to form pores in which the tissue is rapidly cultured and is regenerated.