Transparent Dual-Layer Cell Culture Substrate for Real-Time Observation
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Solution Overview
Problem
Conventional dual-layer culture substrates for intestinal epithelial tissue models are expensive, have a small culture surface, and lack functionality and structure, making them unsuitable for real-time observation and effective tissue formation.
Innovation Solution
A transparent dual-layer culture substrate composed of a porous cellulose derivative membrane and polymer microfibers, which becomes light-permeable when soaked in an aqueous medium, enabling real-time optical microscopy observation and supporting the formation of a three-dimensional intestinal villus structure with enhanced mucus production and enzymatic activities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional porous membrane is used for cell culture, then cell culture is possible, but real-time optical observation cannot be performed due to poor light permeability
Solution Approach 1:
The patent applies parameter changes by controlling the porosity of the cellulose derivative membrane within a specific range (porosity of 5-80%) to achieve optimal balance between light permeability and structural integrity. By adjusting physical parameters like porosity and material composition, the membrane transitions from opaque to transparent while maintaining its function as a culture substrate, enabling real-time optical observation without compromising observation capability
Solution Approach 2:
The patent uses composite materials by combining cellulose derivative (such as cellulose acetate) with specific porosity characteristics to create a membrane that exhibits both mechanical strength and optical transparency. The composite structure allows light transmission while providing a stable substrate for cell culture, resolving the contradiction between light permeability and observation capability
2Reliability
If a dual-layer structure with microfibers is added to improve tissue model functionality, then three-dimensional structure and mucus production are enhanced, but light permeability and real-time observation capability are reduced
Solution Approach 1:
The patent applies local quality by creating a dual-layer structure where each layer has distinct properties: the lower layer (porous membrane) provides structural support and optimized light permeability for observation, while the upper layer (microfiber layer) provides three-dimensional structure and biological functionality. This spatial differentiation of functions allows both light transmission and tissue model functionality to coexist
Solution Approach 2:
The patent uses dimensionality change by arranging layers in a vertical configuration with the transparent porous membrane at the bottom and microfibers on top. This vertical stacking allows optical observation through the transparent lower layer while the upper layer provides the necessary three-dimensional structure, effectively separating the observation function from the structural function in different spatial dimensions
3Area of stationary object
If conventional substrates are used, then cell culture is possible, but the culture surface area is limited and cost is high
Solution Approach 1:
The patent applies the principle of using cost-effective materials by selecting cellulose derivative as the base membrane material, which is significantly cheaper than conventional polymeric culture substrates. The porous structure is created through cost-efficient methods, enabling large-area substrates to be manufactured at low cost while maintaining functionality
Solution Approach 2:
The patent uses segmentation by dividing the culture substrate into a modular dual-layer structure that can be independently optimized and manufactured. This segmentation allows for scalable production where each layer can be produced separately and assembled, facilitating large-area substrates with reduced manufacturing costs through standardized production processes
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 transparent dual-layer substrate allows for cost-effective, large-area tissue culture with improved functionality and structure, enabling real-time observation and efficient formation of intestinal epithelial tissue models with enhanced mucus production and enzymatic activities, overcoming the limitations of conventional substrates.
Implementation Method 1
The dual-layer culture substrate turns transparent when it is soaked in an aqueous medium such as a culture medium, which enables real-time and temporal observation of culture cells using an optical microscope
Implementation Method 2
a porous cellulose derivative membrane which is light-permeable under a wet condition
Data Source
AI summary
The purpose of the present invention is to provide: a cell culture substrate, which is suitable for the fabrication of an in vitro biological tissue model of a biological tissue having an air-liquid interface and which enables temporal and real-time observation under an optical microscope, and a method for manufacturing the same; and a biological tissue model fabricated by using the cell culture substrate and a method for fabricating the same. A cellulose derivative membrane that is light-permeable under a wet condition by an aqueous medium is made porous to thereby impart water absorption properties suitable for a culture substrate thereto. This porous cellulose derivative membrane is combined with polymer microfibers to give a transparent dual-layer substrate as a cell culture substrate. Further, cells are cultured at an air-liquid interface using the transparent dual-layer substrate to give an in vitro biological tissue model having characteristics similar to a biological tissue.