3D Tumor Model Using Pure dECM Bioink for TME Reproduction
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Solution Overview
Problem
Existing 3D tumor models fail to accurately reproduce the tumor microenvironment (TME) due to the use of exogenous biopolymers and rheological modifiers in decellularized extracellular matrix (dECM)-based bioinks, which interfere with cell behavior and mobility, especially in metastatic models.
Innovation Solution
A 3D tumor model is developed using FESH bioprinting technology with dECM-based bioinks that are free from exogenous polymers and crosslinking agents, featuring an inner core surrounded by a stromal shell, allowing for the reproduction of the TME without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If exogenous biopolymers and rheological modifiers are added to dECM-based bioinks to improve printability, then the printability and structural stability are improved, but the cell behavior and mobility are interfered with
Solution Approach 1:
The invention extracts and removes exogenous biopolymers and rheological modifiers from the dECM-based bioink formulation. By using pure decellularized extracellular matrix without additional additives, the patent eliminates the harmful interference with cell behavior while maintaining printability through the inherent properties of the dECM material.
Solution Approach 2:
The invention changes the physical and chemical parameters of the dECM material through controlled decellularization and processing to achieve optimal printability. By adjusting parameters such as crosslinking density, gelation temperature, and matrix composition during the decellularization process, the patent achieves printable properties without requiring exogenous additives.
2Stability of the object's composition
If crosslinking agents are used to stabilize the bioink structure, then the structural stability is improved, but the cell mobility and dynamic behavior are restricted
Solution Approach 1:
The invention employs self-service crosslinking mechanisms where the dECM material crosslinks itself through inherent biochemical processes without requiring exogenous crosslinking agents. The decellularized matrix contains endogenous crosslinking components that stabilize the structure while preserving cell mobility, as the crosslinking occurs through natural biochemical pathways compatible with living cells.
3Ease of operation
If simple 2D culture models are used, then the ease of operation is improved, but the reproduction of tumor microenvironment complexity is insufficient
Solution Approach 1:
The invention transitions from two-dimensional culture models to three-dimensional bioprinted structures that reproduce the spatial architecture of the tumor microenvironment. By adding the third dimension and creating layered constructs with different cell types and ECM compositions, the patent achieves high TME reproduction fidelity while maintaining operational simplicity through automated bioprinting processes.
Solution Approach 2:
The invention uses composite bioink formulations containing multiple cell types (tumor cells, stromal cells, immune cells) embedded in dECM matrix. This composite approach recreates the cellular and structural complexity of the tumor microenvironment within a single integrated 3D construct, achieving high biological fidelity without requiring multiple separate culture systems.
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 model provides a highly reproducible and dynamic representation of the TME, suitable for high-throughput drug screening and personalized medicine, enabling accurate analysis of metastatic and non-metastatic tumor behaviors.
Implementation Method 1
incubating the gel structure resulting from step c) at a temperature between 25 and 40 °C for the simultaneous crosslinking of the inner core and the outer stromal layer
Data Source
Figure 1A~1D
Figure 2A
Figure 2B
AI summary
The present invention refers to a process for preparing a three-dimensional tumor model having a core-shell structure using bioprinting techniques leading to tumor models capable of better reproducing the physiopathological complexity of real tumors, mimicking the tumor microenvironment and the original tumor tissue extracellular matrix. The process is based on the use of dECM (decellularized extracellular matrix) bioinks but with the particularity that no exogenous biopolymers that modify the rheological properties to improve printability are needed. The absence of rheological modifiers in the bioinks avoids any kind of physical or biochemical interference in the tumor model so obtained.