Colloidal Silica Coated Cell Culture Substratum for Thermal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Polystyrene cell culture dishes have low cell adhesion rates and viability, poor thermal stability, and are not recyclable due to heat sterilization limitations, and they absorb ultraviolet rays, making them inadequate for advanced cell culture applications.
Innovation Solution
A cell culture substratum with an inorganic material surface featuring concavo-convex structures that accommodate integrin proteins and extracellular matrix proteins, providing improved cell adhesion and viability, thermal stability, and resistance to ultraviolet light, along with a method for producing and recycling the substratum and a maintenance fluid for protein degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a polystyrene cell culture dish is used, then it is easy to manufacture and inexpensive, but the cell adhesion rate and cell viability are low
Solution Approach 1:
The invention applies local quality by coating only the culture surface of the polystyrene dish with a colloidal silica film. This creates a localized region with enhanced cell adhesion properties while maintaining the overall polystyrene structure. The silica coating provides specific surface characteristics that promote cell attachment, addressing the low cell adhesion rate problem without requiring complete replacement of the polystyrene material.
Solution Approach 2:
The invention uses composite materials by combining polystyrene base material with a colloidal silica coating layer. This composite structure integrates the manufacturing advantages of polystyrene with the cell-adhesion benefits of silica. The two materials work together to provide both ease of manufacture and improved cell adhesion performance.
2Ease of manufacture
If a polystyrene cell culture dish is used, then it is easy to manufacture, but the heat resistance is low and it cannot be recycled via heat sterilization
Solution Approach 1:
The silica coating is applied locally to the culture surface, creating a heat-resistant layer where it is most needed for cell culture operations. This localized approach provides thermal stability enhancement without requiring the entire polystyrene dish to be replaced with high-temperature resistant material, thus maintaining ease of manufacture while improving heat resistance.
Solution Approach 2:
The composite structure of polystyrene with silica coating provides combined properties: the polystyrene maintains ease of manufacture and molding, while the silica layer contributes heat resistance and enables recycling through heat sterilization. The composite material approach allows integration of complementary properties from different materials.
3Quantity of substance
If a polystyrene cell culture dish is used, then it is inexpensive, but it absorbs ultraviolet rays making it inadequate for advanced cell culture applications
Solution Approach 1:
The silica coating is applied specifically to the culture surface where cells are grown and observed. This localized treatment addresses the UV absorption problem in the critical observation area without requiring complete replacement of the polystyrene dish, thus maintaining cost-effectiveness while reducing UV interference for advanced cell culture applications.
Solution Approach 2:
The composite of polystyrene and silica creates a material system where the silica component reduces ultraviolet absorption. The silica layer modifies the optical properties of the dish surface, making it more suitable for applications requiring UV transparency while maintaining the cost advantages of the polystyrene base material.
4Reliability
If the substrate surface is coated with a colloidal silica film, then cell adhesion and heat resistance improve, but the surface structure becomes more complex
Solution Approach 1:
The colloidal silica film forms a porous structure on the polystyrene surface. This porous morphology increases the effective surface area and provides multiple attachment sites for cells, thereby enhancing cell adhesion. The porous structure is formed through the natural assembly of colloidal silica particles, creating a complex but functional surface architecture that promotes cell interaction.
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 substratum enhances cell adhesion and viability, maintains thermal stability, and prevents ultraviolet absorption, facilitating efficient cell culture and recycling, while allowing for effective cell observation and material reuse.
Implementation Method 1
the substrate surface for culturing cells is coated with a colloidal silica film
Implementation Method 2
the polystyrene cell culture dish is problematic in that it cannot be recycled via heat sterilization because of its low heat resistance
Implementation Method 3
they absorb ultraviolet rays, making them inadequate for advanced cell culture applications
Implementation Method 4
multiple concavo-convex structures on a culturing surface thereof, when the concavo-convex structures are measured with an atomic force microscope
Data Source
AI summary
The purpose of the present invention is to provide a cell culture substratum which has excellent resistance to liquid culture media and low cytotoxicity, can achieve a high cell adhesion ratio and a high viability of cultured cells, has excellent thermal stability, and is less likely to absorbs ultraviolet ray. A cell culture substratum which is provided with a substrate made from an inorganic material and has multiple concavo-convex structures on a culturing surface thereof, wherein, when the concavo-convex structures are measured with an atomic force microscope in accordance with JISB0601 and JISR1683 (measured area: a 1 μm-square, cut-off value of a low-pass contour curve filter: 1 nm, cut-off value of a high-pass contour curve filter: 170 nm), the average of the lengths of contour curve elements of the concavo-convex structures is 1 to 170 nm as measured in at least one direction (when a curve showing long-wavelength components that are blocked by the high-pass contour curve filter is converted to a straight line by the least square method, the average line is a line that is parallel with the straight line and indicates a height cumulative relative frequency distribution in the contour curve of 50%).