Vascularized Tissue Scaffold Using Dissolvable Filament Networks
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Solution Overview
Problem
Conventional bioreplicated biological tissues have limitations such as limited functionality, size, and immune reactions due to lack of blood vessels and extracellular matrix, layered structure, and high production costs.
Innovation Solution
A method involving the creation of a network structure from interconnected filaments of a support polymer, coated with protein material and seeded with endothelial and tissue-forming cells, followed by dissolution to form vascularized tissue with geometrically distributed cavities mimicking blood vessels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional bioreplicated biological tissue is produced using accumulated differentiated cells, then the tissue can be produced relatively simply, but the tissue lacks blood vessels and extracellular matrix, limiting its functionality and adaptability to natural tissue properties
Solution Approach 1:
The patent embeds a network structure containing both endothelial cells (forming blood vessels) and tissue-forming cells within a single scaffold. The endothelial cells line the network channels while tissue-forming cells populate the surrounding spaces, creating a nested cellular arrangement that mimics natural tissue architecture with blood vessels embedded within tissue parenchyma.
Solution Approach 2:
The patent introduces a soluble matrix material as an intermediary substance that fills the spaces between network filaments and provides a natural extracellular matrix environment. This intermediary material enables cell differentiation, migration, and organization while being subsequently removed to create vascularized tissue with native-like properties.
2Volume of moving object
If conventional tissue products are produced in larger dimensions, then more tissue is available for application, but cells within the tissue cannot be optimally supplied with nutrients and oxygen, leading to cell death
Solution Approach 1:
The patent divides the tissue structure into a network of interconnected channels separated by filaments, creating multiple small vascular units throughout the tissue volume. This segmentation ensures that no cell is far from a blood vessel, enabling efficient nutrient and oxygen distribution even in large-scale tissue constructs.
Solution Approach 2:
The patent creates different local environments within the tissue by positioning endothelial cells along network channels for vascular function and tissue-forming cells in surrounding regions for tissue-specific functions. This local differentiation of cell types and functions enables large-scale tissue production while maintaining cell viability through localized vascular supply.
3Ease of manufacture
If conventional tissue products are produced with layered structure in adherent state, then the tissue can be cultivated using standard methods, but the structure is not optimally adapted to the natural spatial form of tissue
Solution Approach 1:
The patent transitions from conventional two-dimensional layered tissue culture to three-dimensional network structure cultivation. The network filaments form a spatial framework that supports cells in three dimensions, replicating the natural spatial architecture of tissue while remaining compatible with standard bioreactor cultivation methods.
4Adaptability or versatility
If conventional tissue products are implanted into a biological organism, then the tissue can be used for research or implantation, but undesirable immune reactions or rejection reactions occur due to composition differences from natural tissue
Solution Approach 1:
The patent uses homogeneous natural materials for the network structure (such as collagen, gelatin, or alginate filaments) and soluble matrix material that match the composition of natural extracellular matrix. This material homogeneity reduces immunogenicity and enables the tissue to be recognized as self rather than foreign material upon implantation.
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
The vascularized tissue better adapts to natural tissue properties, allows larger dimensions, reduced immune reactions, and lower production costs, enabling new applications in research and implant medicine.
Implementation Method 1
dissolving the filaments of the network structure, so that the vascularized tissue is formed
Data Source
Figure 1A~2C
Figure 3A~5B
Figure 6A~7B
AI summary
The invention relates to a method for producing vascularized biological tissue, having the steps of producing a network structure made of a plurality of interconnected filaments (11) of a support polymer, coating the network structure with a protein material, populating the coated network structure with endothelial cells (2, 2A) and tissue-forming biological cells (3), and dissolving the filaments (11) such that the vascularized tissue (1) is formed. The vascularized tissue (1) comprises cardiomyocytes, liver cells, renal cells, nerve cells, and/or pancreatic cells, for example.