Non-Fluorine Resin Substrate for Stable Cell Culture
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Solution Overview
Problem
Current methods for creating hydrophilic surfaces for cell culture are either complex, damage-prone, or require bio-derived materials that are unstable and prone to contamination, making it difficult to culture stem cells without specific environments like feeder cells or extracellular matrix proteins.
Innovation Solution
A non-fluorine resin substrate is treated with UV irradiation in a humidified oxygen and/or ozone atmosphere to generate a surface suitable for cell adhesion and proliferation, maintaining stem cell undifferentiation without the need for feeder cells or extracellular matrix proteins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If corona discharge treatment is used to impart hydrophilicity to the surface, then the surface becomes hydrophilic with oxygen atoms, but the oxygen atoms are rapidly removed and the surface deteriorates easily
Solution Approach 1:
The invention changes the treatment parameters by using plasma discharge instead of corona discharge, and by controlling the treatment conditions (vacuum environment, treatment time) to achieve stable oxygen atom incorporation without rapid removal. This parameter change resolves the contradiction between initial hydrophilicity and long-term stability.
Solution Approach 2:
The invention uses a vacuum environment during plasma discharge treatment, which acts as an inert atmosphere preventing rapid oxidation and removal of oxygen atoms from the surface. This protective environment allows the oxygen atoms to remain stable on the surface, resolving the deterioration problem.
2Quantity of substance
If plasma discharge is used to attain higher oxygen level than corona discharge, then hydrophilicity is improved, but the substrate needs to be treated in a vacuum and the treatment process becomes complicated
Solution Approach 1:
The invention optimizes the plasma discharge parameters including vacuum pressure, treatment time, and power input to achieve high oxygen content (20-40 at%) while maintaining a relatively simple treatment process. The controlled vacuum environment enables efficient oxygen incorporation without requiring complex multi-step procedures.
3Quantity of substance
If plasma discharge is used to increase oxygen level on the surface, then hydrophilicity is improved, but the surface is easily damaged
Solution Approach 1:
The invention applies partial plasma discharge treatment for a controlled duration (5-30 seconds) to achieve sufficient oxygen content (20-40 at%) without excessive treatment that would damage the surface. This partial action approach balances oxygen incorporation with surface integrity preservation.
Solution Approach 2:
The vacuum environment during plasma treatment acts as a protective inert atmosphere that prevents uncontrolled surface degradation while enabling efficient oxygen atom incorporation. This controlled environment allows high oxygen content to be achieved without proportional increase in surface damage.
4Adaptability or versatility
If bio-derived materials like feeder cells, cytokines, or extracellular matrix proteins are used to culture stem cells, then cell culture is enabled, but stability is low and contamination risk increases
Solution Approach 1:
The invention extracts and eliminates the need for bio-derived materials (feeder cells, cytokines, extracellular matrix proteins) by creating a synthetic hydrophilic surface through plasma discharge treatment. This extraction resolves the contradiction by achieving cell culture capability through physical-chemical surface modification rather than biological materials, thereby improving stability and reducing contamination risk.
Solution Approach 2:
The invention replaces the biological system (bio-derived materials) with a physical-chemical system (plasma discharge treatment creating hydrophilic surface). This substitution eliminates the instability and contamination issues inherent in bio-derived materials while maintaining stem cell culture capability.
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 method stably imparts hydrophilicity to the substrate, allowing for efficient cell adhesion and proliferation while reducing the need for bio-derived materials, thus enhancing stability and reducing contamination risks.
Implementation Method 1
irradiating UV to the cell supporting surface of the substrate under an oxygen and/or ozone atmosphere during and/or after the humidification step
Data Source
AI summary
The invention provides a method for producing a substrate for supporting cells, including a humidification step of humidifying the periphery of a non-fluorine resin based substrate, and a UV irradiation step of irradiating the substrate with UV in an oxygen and/or ozone containing atmosphere during and/or after the humidification step. The invention also provides a substrate for supporting cells, which is a non-fluorine resin based substrate. The substrate has a cell supporting surface for supporting cells, containing a component capable of generating C7H5O+ molecules by beam irradiation of a time-of-flight secondary ion mass spectrometer, such that cells are supported on the cell-supporting surface.