Epicardial ECM Isolation for Native 3D Cell Culture Matrices
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Solution Overview
Problem
Current methods for obtaining and using extracellular matrix (ECM) for cell culture studies face challenges such as uncontrolled variability, limited availability, and the need for large animal sources, which complicates the study of epicardial-derived ECM, especially due to the limited cell number and short half-life of primary epicardial cultures, and existing cell lines do not adequately replicate the native properties of the ventricular epicardium.
Innovation Solution
The development of the EPIC cell line, which is an immortalized cell line derived from embryonic epicardium, provides a source for ECM that better replicates native structural and molecular properties, and a method of isolating ECM using NH4OH de-cellularization to preserve its native three-dimensional structure, allowing for improved cell culture applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If de-cellularised ECM from whole organs is used, then native ECM architecture is preserved, but uncontrolled variability and limited tissue source availability weaken its viability
Solution Approach 1:
The invention segments the ECM source from whole organs to specific cell types (epicardial cells). Instead of using de-cellularised whole heart tissue which has uncontrolled variability, the patent isolates and cultures pure epicardial cells to produce ECM with controlled and defined composition, while still maintaining native architectural features through the specific cell lineage's natural ECM production.
Solution Approach 2:
The invention creates a controlled copy of native ECM by using immortalized epicardial cell lines that naturally produce ECM with native-like composition and architecture. This copying approach through cell culture allows reproduction of native ECM properties without the variability and availability issues of whole organ sources.
2Stability of the object's composition
If native proteins from primary cultures are used, then cellular microenvironment is better preserved, but a large number of animals are required which violates the 3Rs principle
Solution Approach 1:
The invention performs preliminary action by establishing immortalized epicardial cell lines that can be expanded and stored indefinitely. This allows accumulation of sufficient ECM material from a single cell line source without needing to harvest from multiple animals, thus reducing animal usage while preserving the native cellular microenvironment characteristics.
Solution Approach 2:
The immortalized epicardial cell lines serve themselves by continuously producing ECM with native microenvironment properties. A single established cell line can generate unlimited amounts of ECM material through self-renewal and proliferation, eliminating the need for continuous animal harvesting while maintaining composition stability.
3Quantity of substance
If existing epicardium-derived cell lines are used, then sufficient ECM quantity can be obtained, but they do not adequately replicate the native properties of the ventricular epicardium
Solution Approach 1:
The invention changes the key parameter of cell line origin and characteristics. Instead of using existing epicardium-derived cell lines with altered properties, the patent employs immortalized cells directly from ventricular epicardium that maintain native phenotypic and molecular characteristics. This parameter change ensures both sufficient ECM production and faithful replication of native ventricular epicardium properties.
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 ECM derived from the EPIC cell line exhibits enhanced angiogenic and proliferative properties, outperforming commercial matrices like Matrigel in cell culture growth and retention, and can be used for cardiac conditions such as cardiac wall repair.
Implementation Method 1
a method for obtaining it, and its use
Data Source
Figure 1i~1iii'
Figure 2~3
Figure 4
AI summary
The present invention relates to an extracellular matrix obtained from an EPIC murine cell line, the method of obtaining same and uses in cell cultures.