Temperature-Responsive Substrate with Fluorine Polymer for Cell Detachment
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Solution Overview
Problem
Conventional temperature-responsive polymer-coated cell culture substrates face challenges in uniform cell attachment and detachment, with cell sheets often breaking during detachment due to the sea-island structure of the polymer coatings, leading to damage and contamination issues.
Innovation Solution
A temperature-responsive substrate with a fluorine-containing monomer-derived unit is developed, featuring a lower critical solution temperature (LCST) of 0 to 15°C, achieved through radiation surface graft polymerization, which enhances cell detachment with reduced damage and contamination, and allows for easier handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional temperature-responsive polymer coatings are used, then cell detachment function is provided, but cell sheets break during detachment due to non-uniform structure
Solution Approach 1:
The patent applies homogeneity by ensuring uniform distribution of temperature-responsive polymer chains throughout the coating layer. The coating is designed so that polymer chains are evenly dispersed at the molecular level, eliminating the sea-island structure. This uniform distribution ensures consistent cell detachment properties across the entire substrate surface, preventing cell sheet breakage during detachment while maintaining reliable temperature-responsive functionality.
2Ease of operation
If enzyme treatments or chemical treatments are used for cell detachment, then cells can be detached from substrate, but contamination risk increases and cell natural functions are impaired
Solution Approach 1:
The patent replaces chemical/enzymatic treatment systems with a physical temperature-responsive system. The coating contains polymer chains that undergo conformational changes in response to temperature variations. At physiological temperature, the chains maintain a state that promotes cell attachment, while at a slightly lower temperature, the chains transition to a state that reduces adhesion, enabling effortless cell detachment. This mechanical/physical approach eliminates the need for harmful chemicals and enzymes, thereby reducing contamination risk and preserving cell natural functions.
3Adaptability or versatility
If temperature-responsive polymer coating is applied, then cell detachment is enabled, but grafting does not progress uniformly in crystal portions leading to non-uniform cell attachment
Solution Approach 1:
The patent applies parameter changes by carefully controlling the molecular weight, composition, and density of the temperature-responsive polymer chains in the coating. These parameter adjustments ensure that the polymer chains remain in a flexible, non-crystalline state that allows uniform grafting across the entire substrate surface. The modified polymer parameters enable consistent interaction with cells throughout the coating layer, resulting in uniform cell attachment and growth while maintaining temperature-responsive detachment functionality.
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 substrate improves cell detachment efficiency, reduces damage to cell sheets, and facilitates easier handling by controlling detachment at lower temperatures, ensuring uniform cell growth and minimizing contamination risks.
Implementation Method 1
a temperature-responsive substrate having on its surface a layer comprising at least one polymer, wherein the at least one polymer is responsive to temperature and comprises a fluorine-containing monomer-derived unit
Implementation Method 2
achieved through radiation surface graft polymerization
Data Source
AI summary
A temperature-responsive substrate having on its surface a layer containing at least one polymer, the at least one polymer being responsive to temperature and containing a fluorine-containing monomer-derived unit. Also disclosed is a polymer and composition for use in producing the substrate, as well as methods for producing, using and evaluating the substrate.