Gas Dissolution Testing for Cytotoxicity Across Mammalian Cells
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Solution Overview
Problem
Existing methods are inadequate for evaluating the cytotoxicity of gases on cells other than bronchial- or lung-derived cells.
Innovation Solution
A method involving dissolving a gas in a cell culture medium at a pH of 7.1 to 7.7 and temperature of 35 to 39°C, followed by a cell function measurement step, to assess cytotoxicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a semi-permeable membrane is used at the air-liquid interface to expose cells to gas, then gas toxicity can be evaluated on bronchial- or lung-derived cells, but the method cannot be applied to other types of cells present in cell culture medium
Solution Approach 1:
The patent removes the semi-permeable membrane component from the evaluation system, directly exposing cells in the cell culture medium to the test gas. This extraction of the membrane element simplifies the system and enables application to various cell types not limited to bronchial- or lung-derived cells.
Solution Approach 2:
The patent introduces a gas-permeable cap as an intermediary component that allows direct gas exposure to cells in the culture medium while maintaining system integrity. This mediator enables versatile cell type application without requiring complex membrane-based interfaces.
2Measurement precision
If cells are cultured on a semi-permeable membrane for direct gas exposure, then gas cytotoxicity can be measured, but the method is limited to specific cell types and requires complex setup
Solution Approach 1:
By removing the semi-permeable membrane and using direct gas exposure through a gas-permeable cap, the method maintains measurement precision for cytotoxicity evaluation while significantly improving ease of operation and applicability to various cell types.
3Adaptability or versatility
If gas is dissolved in cell culture medium at controlled pH and temperature, then cytotoxicity can be evaluated on various mammalian cells, but requires specific condition control
Solution Approach 1:
The patent utilizes parameter changes (pH 7.1-7.7 and temperature 35-39°C control) of the cell culture medium to optimize gas dissolution and enable cytotoxicity evaluation on various mammalian cells. This approach achieves versatility across cell types while using standard cell culture conditions.
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 cytotoxicity evaluation of gases on various mammalian cells, including cardiomyocytes, by maintaining cell viability and function assessment.
Implementation Method 1
a gas dissolution step for dissolving a gas in a cell culture medium
Data Source
AI summary
A method for evaluating the cytotoxicity of a gas, the method being applicable to cells present in a cell culture medium, namely, to cells other than bronchial- or lung-derived cells. The method including: a gas dissolution step for dissolving a gas in a cell culture medium, and a cell evaluation step for measuring a cell function, in this order.