Crowded Collagen Constructs for Reproducible Organoid Scaffolds
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Solution Overview
Problem
Current methods for deriving epithelial organoids in three-dimensional matrices result in stochastically developing tissues with limited lifespan, size, and restricted experimental manipulation, hindering their use in research and clinical applications due to heterogeneous and irreproducible structures, as well as a lack of addressing longer length-scale tissue developmental processes.
Innovation Solution
A method involving the formation of crowded collagen constructs using a collagen solution and a macromolecular bath solution with high molecular weight polyethylene glycol (PEG), allowing for rapid synthesis of extracellular matrix-based scaffolds of various shapes and sizes, from micro to macroscales, by delivering the collagen solution into the PEG bath to create constructs such as disk-shaped, elongated strips, or vascularized tissue constructs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional three-dimensional matrices are used to derive epithelial organoids, then organoid formation occurs, but the structures become heterogeneous and irreproducible with limited lifespan and size
Solution Approach 1:
The patent applies preliminary action by pre-forming standardized collagen constructs with defined geometries (spheres, cylinders, sheets) before introducing epithelial cells. This pre-structuring ensures that cells develop within controlled architectural frameworks rather than forming stochastic structures, thereby improving reproducibility and homogeneity of organoid compositions.
Solution Approach 2:
The patent utilizes parameter changes by controlling collagen concentration (1-5 mg/mL), crosslinking conditions (transglutaminase or glutaraldehyde), and construct geometry to systematically optimize tissue structure. By adjusting these parameters, the method achieves homogeneous and reproducible organoid formations with extended lifespan and size compared to traditional matrices.
2Productivity
If rapid synthesis of ECM-based scaffolds is implemented, then productivity increases, but manufacturing precision may be compromised
Solution Approach 1:
The patent employs preliminary action by pre-forming collagen constructs into standardized geometries (spheres, cylinders, sheets) using molds or extrusion techniques before rapid assembly. This allows quick production of multiple identical scaffolds while maintaining precise geometric control, thus achieving both high productivity and manufacturing precision simultaneously.
Solution Approach 2:
The patent exploits phase transitions by controlling the sol-gel transition of collagen through temperature changes (4°C storage followed by 37°C incubation) and chemical crosslinking. This enables rapid transformation from liquid collagen solution to solid gel scaffolds with defined geometries, achieving fast synthesis without compromising structural precision.
3Ease of operation
If closed cystic architecture is formed in organoids, then self-organization occurs, but experimental manipulation is restricted and homeostasis is prohibited
Solution Approach 1:
The patent applies segmentation by dividing the tissue architecture into modular components: an outer structural framework (collagen construct), intermediate functional layers (epithelial cell layers), and internal luminal spaces. This segmented design maintains self-organization while creating accessible interfaces for experimental manipulation and enabling controlled homeostatic conditions.
Solution Approach 2:
The patent transitions from two-dimensional monolayer cultures to three-dimensional constructs with internal cavities and layered structures. This dimensional change allows cells to self-organize in physiologically relevant 3D configurations while maintaining accessibility from multiple directions, facilitating both homeostasis and experimental manipulation.
4Length of moving object
If traditional organoid methods are used, then local self-organization occurs, but longer length-scale tissue developmental processes are not addressed
Solution Approach 1:
The patent scales up from micro-scale organoids to macro-scale tissue constructs by increasing the dimensions of collagen scaffolds (centimeter-scale sheets and blocks) and controlling hierarchical self-assembly. This enables study of tissue development across multiple length scales, from cellular to organ-level processes, while maintaining self-organization principles.
Solution Approach 2:
The patent creates a universal platform using collagen-based constructs that can accommodate various cell types (epithelial, stromal, vascular) and tissue configurations (sheets, tubes, solid constructs). This multi-functional approach allows the same basic methodology to address both local self-organization and long-range tissue developmental processes across different tissue types and scales.
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 the rapid generation of scaffolds for tissue engineering, allowing for fast synthesis of tissues, instant positioning of cells in a 3D environment, and the creation of various geometries, including macroscopic tissue strips, facilitating bioprinting and enabling the fabrication of collagen constructs in any shape, thereby overcoming the limitations of existing organoid derivation methods.
Implementation Method 1
providing a macromolecular bath solution, and delivering the collagen solution into the macromolecular bath solution to form crowded collagen constructs
Data Source
AI summary
In some aspects, the present invention provides a method of forming crowded collagen based constructs, having the steps of providing a collagen solution in a buffer, providing a macromolecular bath solution, and delivering the collagen solution into the macromolecular bath solution to form crowded collagen constructs. In other aspects, the present invention provides a method of forming crowded cellular based constructs, having the steps of providing a cellular solution in a buffer, providing a macromolecular bath solution, and delivering the cellular solution into the macromolecular bath solution to form crowded cellular constructs.