3D Fiber Cell Culture Sheet for High-Density Cell Recovery
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Solution Overview
Problem
Existing cell culture methods face challenges in achieving high-density cell culture, maintaining cell adhesion, preventing agglomeration, and efficiently recovering cells without damaging them, especially in large-capacity systems.
Innovation Solution
A cell culture sheet with a 3-dimensional network structure and functional coating layer promoting cell adhesion, proliferation, and differentiation, using support fibers with specific diameters and basis weights, and a functional coating layer comprising fusion proteins and adhesion proteins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the area of the cell culture sheet is increased to culture a large amount of cells through two-dimensional proliferation, then the cell production capacity is improved, but the device volume requirement increases and hits a limitation in large-capacity systems
Solution Approach 1:
The patent transitions from two-dimensional cell culture on flat sheets to three-dimensional cell culture within porous fiber webs. The porous structure provides internal void spaces that enable cells to proliferate in three dimensions, significantly increasing cell production capacity without requiring proportional increases in device volume. This dimensional transformation allows efficient use of available space in large-capacity culture systems.
Solution Approach 2:
The patent employs porous fiber webs as the cell culture substrate. The porous structure provides three-dimensional space for cell infiltration and proliferation, allowing cells to grow throughout the volume of the substrate rather than just on the surface. This enables high-density cell culture with improved productivity while maintaining compact device dimensions.
2Reliability
If the adhesion between the cell culture sheet and cells is improved to maintain cell attachment during medium circulation, then cell culture efficiency is improved, but cell recovery becomes difficult and may require damaging physical or chemical treatment
Solution Approach 1:
The patent applies functional coating layers with specific adhesion properties to the fiber web substrate. These coatings provide localized adhesion characteristics that are sufficient to maintain cell attachment during medium circulation but allow for controlled detachment during recovery. The local quality of the coating enables differential behavior during culture versus recovery phases.
Solution Approach 2:
The adhesion characteristics of the cell culture sheet are designed to be dynamic rather than static. The functional coating layers provide strong adhesion during the culture phase to maintain cell attachment under flow conditions, but allow for controlled detachment during the recovery phase through physiological means, eliminating the need for harsh physical or chemical treatments.
3Ease of manufacture
If cells are cultured to form a thin film combined with various substances for recovery, then cell collection is simplified, but cell separation into individual cells becomes difficult and the cell mass is difficult to use for research purposes
Solution Approach 1:
The porous fiber web structure allows cells to be collected within the three-dimensional matrix rather than as a thin film. The porous architecture maintains cell individuality while enabling easy collection through substrate removal or detachment, providing both simplified recovery and efficient cell separation for research applications.
Solution Approach 2:
The patent maintains cells as discrete individual units within the porous matrix rather than allowing them to form confluent thin films. This segmentation approach enables easy collection of the fiber web with attached cells, followed by simple separation of individual cells from the matrix, providing both collection efficiency and research-grade cell preparations.
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 solution enables high-density cell culture with improved adhesion and recovery efficiency, producing younger and healthier cells, particularly stem cells, with enhanced differentiation capabilities in large-capacity systems.
Implementation Method 1
a functional coating layer which is coated on the support fibers exposed on at least one surface of the fiber web, and has a function of promoting one or more of the adhesion, movement, proliferation and differentiation of cells
Data Source
AI summary
Provided is a cell culture sheet. A cell culture sheet according to an embodiment of the present invention includes: a fiber web which has a 3-dimensional network structure formed through the accumulation of support fibers having an average diameter of at most 1.5 μm, and has a basis weight of 1 to 15 g/m2; and a functional coating layer which is coated on the support fibers exposed on at least one surface of the fiber web, and has a function of promoting one or more of the adhesion, movement, proliferation, and differentiation of cells. Accordingly, cell adhesion is improved due to the large specific surface area and the surface morphology suitable for cells, and the adhered cells are stably supported. Moreover, the cells can be cultured at high density at a high culture efficiency, and can be cultured and recovered without agglomeration caused by forming a thin film.