Micropatterned Cell Culture Wells for Uniform 3D Spheroid Formation
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Solution Overview
Problem
Conventional two-dimensional and three-dimensional cell culture apparatuses face issues with bio-responsiveness, difficulty in adjusting spheroid size and position, complex configurations, and durability of anti-cell adhesion coatings, which affect cell formation and observation.
Innovation Solution
A cell culture apparatus with a plate featuring wells with a fine pattern on inner surfaces, including guide walls, culture recesses, and protrusions to form uniform spheroids, and integrated storage tanks for fluid supply and rotation to facilitate multi-cell networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate anti-cell adhesion coating layer is disposed on the bottom surfaces of wells to prevent cell adhesion, then cell adhesion is prevented, but the coating layer has low durability and may be easily damaged by contact with pipette during cell culturing
Solution Approach 1:
The invention removes the separate anti-cell adhesion coating layer from the well structure and replaces it with an integrated fine pattern directly formed on the well bottom surface. This extraction of the coating layer eliminates the durability problem while maintaining the cell adhesion prevention function through the fine pattern structure that physically spaces cells from the well surface.
Solution Approach 2:
The fine pattern is formed integrally with the well structure, merging the well function and the anti-adhesion function into a single integrated component. This eliminates the need for a separate coating layer and ensures that the anti-adhesion structure has the same durability as the well itself, resisting damage from pipette contact and other mechanical stresses.
2Ease of operation
If conventional two-dimensional cell culture apparatuses are used, then cell culture is relatively easy, but they have low bio-responsiveness and do not provide accurate biometric information
Solution Approach 1:
The invention transitions from two-dimensional flat well bottoms to three-dimensional fine pattern structures with protrusions and depressions. This dimensional change creates micro-environments that better mimic in vivo conditions, improving bio-responsiveness and biometric information accuracy while maintaining the simplicity of well-based culture formats.
3Shape
If conventional three-dimensional cell culture apparatuses are used, then spheroid formation is possible, but the configuration is excessively complicated due to many variables such as extracellular matrixes, cell culture factors, and shapes of cell culture containers
Solution Approach 1:
Instead of using complex extracellular matrixes and varying container shapes throughout, the invention applies localized fine patterns (protrusions and depressions) only on the bottom surfaces of standard wells. This localized modification provides the necessary three-dimensional cues for spheroid formation while keeping the rest of the system simple and standardized.
Solution Approach 2:
The invention changes the surface topology parameter of the well bottom from flat to patterned with specific protrusion and depression geometries. This parameter change enables spheroid formation without requiring changes to other system parameters such as extracellular matrix composition, container shape, or culture protocol complexity.
Data Source
AI summary
The present invention provides a cell culture apparatus. A cell culture apparatus according to one embodiment of the present invention is a cell culture apparatus for culturing a cell to form the cell into a three-dimensional spheroid. The cell culture apparatus may comprise: a plate; and a well which is arranged, in plural, on one side of the plate at predetermined intervals, has cells cultured inside, and has a micropattern disposed on the inner surface such that the inner surface and the cells are spaced apart from each other.