Photoreactive Layer for Selective Cell Detachment
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Solution Overview
Problem
Existing cell culture instruments cannot selectively detach cells at a desired position, as the working position of proteases used for cell detachment is not limited, leading to incomplete recovery of cells.
Innovation Solution
A cell culture instrument featuring a substrate with a laminated photoreactive layer that includes a polymer with photosolubility and photothermal convertibility, allowing for selective detachment of cells through controlled light irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If protease is used to detach cells, then cells on the entire surface can be recovered, but the working position of the protease cannot be limited so that cells at the desired position cannot be selectively detached
Solution Approach 1:
The culture instrument surface is divided into regions with different properties: a photoreactive layer is formed only at the specific position where cell detachment is desired, while other areas maintain the original substrate properties. This local modification enables selective detachment at the targeted region without affecting other areas.
Solution Approach 2:
A photoreactive layer serves as an intermediary substance between the substrate and cells at the desired position. This layer can be selectively removed or activated by light irradiation, mediating the detachment process only at specific locations where the photoreactive layer is present.
2Productivity
If protease is used for cell detachment, then complete cell recovery is achieved, but selectivity of detachment at desired position is lost
Solution Approach 1:
The chemical action of protease is replaced by a photophysical process. Instead of using protease that acts uniformly across the entire surface, light irradiation is used to activate or remove the photoreactive layer selectively, providing spatial control over detachment without relying on enzyme diffusion and action.
Solution Approach 2:
The properties of the culture instrument surface are changed by introducing a photoreactive layer that responds to light parameters. By controlling light irradiation parameters (wavelength, intensity, duration, position), selective detachment is achieved while maintaining high cell recovery efficiency.
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 instrument enables precise detachment of cells at desired positions by using light to induce photodissolution and photothermal conversion, improving the efficiency and selectivity of cell recovery.
Implementation Method 1
a first irradiation step of irradiating the photoreactive layer with first light that causes photodissolution
Implementation Method 2
a second irradiation step of irradiating the photoreactive layer with second light that causes photothermal conversion
Data Source
AI summary
A cell culture instrument configured to detach cells at a desired position and a cell processing method using the cell culture instrument. The cell culture instrument includes: a substrate; and a photoreactive layer having a photosolubility and a photothermal convertibility, wherein the photoreactive layer is laminated on the substrate, and the photoreactive layer includes a polymer having a photosolubility and a photothermal convertibility.