Controlling 3D Tissue Young's Modulus via Extracellular Matrix Diameter
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Solution Overview
Problem
Current methods for producing three-dimensional tissues using biocompatible scaffold materials fail to effectively control the Young's modulus, which is crucial for replicating the hardness of natural tissues, particularly for applications like cancer tissue models.
Innovation Solution
Adjusting the average diameter of the extracellular matrix within the three-dimensional tissue to control its Young's modulus by using a composition with extracellular matrices of varying diameters, specifically between 20 nm and 1000 nm, and incorporating a ratio of nanofibers and microfibers to achieve a desired mechanical property.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a highly biocompatible scaffold material is used to produce three-dimensional tissue, then the biocompatibility and biological fidelity are improved, but the ability to control the Young's modulus (tissue hardness) deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the average diameter of the extracellular matrix components (20-1000 nm) to adjust the Young's modulus of the three-dimensional tissue. By varying this physical parameter while maintaining biocompatible materials, the invention achieves control over tissue hardness without sacrificing biocompatibility.
Solution Approach 2:
The patent uses composite materials by combining cells with extracellular matrix components of specific size ranges (20-1000 nm average diameter). This composite structure enables the tissue to exhibit desired mechanical properties (Young's modulus of 20 kPa or more) while maintaining biological fidelity through the use of natural extracellular matrix materials.
2Strength
If the extracellular matrix concentration is increased to reproduce harder tissues, then the Young's modulus is improved, but the biocompatibility and naturalness of the tissue deteriorates
Solution Approach 1:
Instead of increasing extracellular matrix concentration to achieve higher Young's modulus, the patent changes the size parameter of the extracellular matrix components (averaging 20-1000 nm). This parameter change allows achieving the desired mechanical strength (20 kPa or more) while maintaining biocompatibility, as the smaller diameter components provide higher stiffness without requiring excessive concentration.
Data Source
AI summary
Disclosed is a method for controlling the Young’s modulus of a three-dimensional tissue containing cells and an extracellular matrix by adjusting the average diameter of an extracellular matrix in production of the three-dimensional tissue.