ECM-Induced Self-Assembly for Mature 3D Printed Artificial Tissue
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Solution Overview
Problem
Existing 3D printing methods for tissue engineering face limitations in tissue induction and maturity, particularly when using synthetic materials that can generate harmful byproducts or form non-uniform cell-biomaterial complexes, and require separate cell growth factors for differentiation.
Innovation Solution
A method involving decellularizing and powdering tissue-derived extracellular matrix (ECM) to form a cell-DECM self-assembly, which is then cultured with cells to create a tissue strand ink, optimized through homogenization, and applied to 3D printing to produce artificial tissue that mimics the biological characteristics of the target organ.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If synthetic materials are used in 3D printing tissue engineering, then printing capability and shape implementation are improved, but harmful byproducts are generated and cell-biomaterial complexes become non-uniform
Solution Approach 1:
The patent extracts and removes cellular components from the extracellular matrix through decellularization, leaving only the ECM framework. This extracted ECM is then used as the biomaterial, eliminating the need for synthetic materials and their harmful byproducts while maintaining printing capability through the natural ECM structure.
Solution Approach 2:
The patent changes the material parameter from synthetic to natural ECM-based biomaterials. By using decellularized ECM powder and processing it into hydrogels or sponges, the material maintains biocompatibility and eliminates harmful byproducts while still enabling 3D printing through controlled fabrication processes.
2Ease of operation
If separate cell growth factors and differentiation factors are used, then cell differentiation control is improved, but process complexity increases
Solution Approach 1:
The patent merges multiple functions into the decellularized ECM structure itself. The ECM provides both structural support and biochemical cues for cell differentiation simultaneously, eliminating the need for separate growth factors and differentiation factors. This integration simplifies the overall process while maintaining differentiation control.
Solution Approach 2:
The decellularized ECM serves multiple functions autonomously: it provides structural framework, delivers biochemical signals for differentiation, and supports cell growth. The ECM structure itself performs the differentiation guidance function without requiring external addition of separate factors, thereby reducing process complexity.
3Reliability
If tissue-derived biomaterials are used in 3D printing, then tissue induction and maturity are improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the tissue engineering process into distinct modular steps: decellularization of tissue, powder processing, hydrogel or sponge formation, and 3D printing. This segmentation allows each step to be optimized independently, reducing overall manufacturing complexity while maintaining high tissue induction and maturity through the use of authentic tissue-derived ECM.
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 fine patterning with micrometer-range widths and maturation into tissue that mimics the biological characteristics of the target organ, allowing for the production of artificial tissues suitable for regenerative medicine applications.
Implementation Method 1
forming a cell-DECM self-assembly by adding the DECM powder to a culture medium containing cells and then culturing the same
Data Source
AI summary
The present invention relates to a method for preparing an extracellular matrix-induced self-assembly-based 3D printed artificial tissue, and artificial tissue prepared thereby, and provides: a method in which a self-assembly, formed by inducing stem cell differentiation using extracellular matrix-derived biomaterials, is applied to 3D printing so that artificial tissue can be fine-patterned with widths in units of micrometers and morphological appearance of origin tissue can be implemented; and artificial tissue printed in a mature tissue form, which is not that of a cell-biomaterial mixture from the time of printing. The artificial tissue prepared by the preparation method of the present invention mimics the biological characteristics of a target organ according to the origin of the extracellular matrix, and thus enables artificial tissue and artificial organs very similar to actual original tissue to be provided.