3D Cell Cluster Culture for Accurate In-Vitro Toxicity Testing

Solution Overview

Problem

Conventional in-vitro toxicity tests expose all cells to a toxic substance intensively, making it difficult to infer practical in-vivo toxic effects, as they do not accurately replicate cell-to-cell interaction found in vivo environments.

Innovation Solution

An in-vitro toxicity test method involving a cell culture dish coated with an artificial elastin-like extracellular matrix, where blast cells form three-dimensional clusters to simulate in vivo conditions, allowing for the measurement of toxic substances like PFOA and PFOS, enhancing cell-to-cell interaction and reducing excessive toxicity exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional in-vitro toxicity tests are performed with cells cultured on polystyrene-coated plates, then the testing process is simple and fast, but the test results do not accurately reflect practical in-vivo toxicity due to intensive exposure of all cells to toxic substances

Engineering Contradiction:

Improveaccuracy of toxicity test resultsVSAvoidcomplexity of cell culture system

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The invention transitions from traditional two-dimensional monolayer cell culture to three-dimensional cell cluster culture. By culturing cells in a three-dimensional configuration within a cell culture dish, the system replicates the spatial organization and cell-to-cell interactions found in in-vivo environments, thereby improving the accuracy of toxicity test results while maintaining a relatively simple culturing process

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The invention segments the cell population into distinct three-dimensional cell clusters rather than maintaining a uniform monolayer. Each cluster forms an independent microenvironment that mimics tissue organization, allowing for more realistic toxicity assessment while keeping the overall culturing system manageable

Inventive Principle:

Principle #1Segmentation

2Reliability

If all cells are cultured in a monolayer on polystyrene plates, then the cell culture process is easy to operate, but cell-to-cell interaction is insufficient to replicate in-vivo conditions

Engineering Contradiction:

Improverepresentativeness of in-vivo conditionsVSAvoidease of cell culture operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The invention transitions from traditional two-dimensional monolayer cell culture to three-dimensional cell cluster culture. By culturing cells in a three-dimensional configuration within a cell culture dish, the system replicates the spatial organization and cell-to-cell interactions found in in-vivo environments, thereby improving the accuracy of toxicity test results while maintaining a relatively simple culturing process

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The invention changes the physical and chemical parameters of the cell culture environment by using a cell culture dish with specific surface properties that promote three-dimensional cluster formation. This includes controlling surface energy, hydrophobicity, and mechanical properties to enable cells to self-organize into three-dimensional structures, thereby enhancing representativeness of in-vivo conditions

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP2808342B1Medium for in-vitro toxicity testing and in-vitro toxicity test method using the same

Publication Date: 2018.10.10 DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY

AI summary

Disclosed are a medium for in-vitro toxicity testing and an in-vitro toxicity test method using the same. Designed in in consideration of cell-to-cell interaction, the method can provide test results nearer to those obtained in practical, in-vivo toxicity tests than can conventional in-vitro toxicity tests.