Near-Infrared Cell Detachment via Photothermal Polymer Films
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Solution Overview
Problem
Conventional methods for detaching cells from culture containers, such as using trypsin, can damage cells and limit the ability to selectively detach desired cells without harming them, which restricts cell proliferation and differentiation capabilities.
Innovation Solution
A cell culture container with a conductive polymer or metal oxide film that absorbs near-infrared radiation, utilizing photothermal characteristics to detach cells without damage, allowing for selective and efficient cell detachment, proliferation, and differentiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional methods like trypsin are used to detach cells, then cells can be detached from culture containers, but the cells are damaged and their proliferation and differentiation capabilities are limited
Solution Approach 1:
The patent replaces chemical detachment methods (trypsin) with a physical method using near-infrared light irradiation. The culture container is designed to absorb near-infrared light and convert it to heat, creating localized thermal effects that detach cells without chemical damage. This substitution eliminates the harmful chemical action of trypsin while achieving the desired cell detachment function.
Solution Approach 2:
The patent changes the physical parameters of the culture container by incorporating materials with specific near-infrared absorption characteristics. By selecting materials that absorb near-infrared light at specific wavelengths and convert it to thermal energy, the system achieves selective heating and cell detachment through controlled parameter changes in the container material properties.
2Adaptability or versatility
If conventional detachment methods are used, then cells can be released, but selective detachment of desired cells without harming them is limited
Solution Approach 1:
The patent applies local quality by designing the culture container with specific regions or patterns that have different near-infrared absorption properties. This allows selective heating of specific areas where desired cells are located, enabling spatially selective cell detachment. The localized thermal effect detaches only the target cells while leaving other cells intact, achieving both selectivity and cell integrity.
Solution Approach 2:
The replacement of chemical detachment with controlled thermal fields enables precise spatial and temporal control over cell detachment. The near-infrared irradiation can be focused on specific regions and controlled in duration, allowing selective detachment of desired cell populations while maintaining the integrity of both detached and retained cells.
3Productivity
If trypsin is treated entirely to a culture container, then cells can be detached, but it is difficult to partially obtain desired cells
Solution Approach 1:
The culture container is designed with spatially varying optical properties, allowing different regions to respond differently to near-infrared irradiation. By controlling the irradiation pattern and duration, users can selectively detach cells from specific regions while leaving other regions unchanged, enabling partial harvesting of desired cell populations with high efficiency and flexibility.
Solution Approach 2:
The system introduces dynamic control over the detachment process through adjustable near-infrared irradiation parameters (intensity, duration, spatial distribution). This dynamic control allows the user to optimize detachment conditions in real-time and perform partial detachments by controlling the irradiation to affect only specific regions or time periods, enhancing both productivity and versatility.
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 solution enables higher proliferation rates of stem cells and allows for the selective detachment and differentiation of cells into specific types like osteocytes, adipocytes, and chondrocytes without harming the cells, improving cell therapy applications.
Implementation Method 1
A cell culture container with a conductive polymer or metal oxide film that absorbs near-infrared radiation, utilizing photothermal characteristics to detach cells without damage
Data Source
AI summary
The present invention relates to a method for selective cell attachment/detachment, cell patternization and cell harvesting by means of near infrared rays. More particularly, conducting polymers or metal oxides having exothermic characteristics upon irradiation of near infrared light is used as a cell culture scaffold, thus selectively attaching/detaching cells without an enzyme treatment. The scaffold has an effect of promoting proliferation or differentiation of stem cells, and therefore, can be used as a stem cell culture scaffold. The scaffold enables cell attachment/detachment without temporal or spatial restrictions, thus enabling cell patternization.