V-Shaped Cell Culture Substrate for Easier Adherent Cell Detachment
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Solution Overview
Problem
Existing culture vessels with increased surface areas for adherent cells face difficulties in detaching cells due to rigid structures and special-shaped grooves or concave portions, making it challenging to recover cells efficiently.
Innovation Solution
A sheet-shaped adherent cell culture substrate with V-shaped grooves and a thickness of 1 mm or less, allowing easy detachment by applying impact after using a dissociation agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a groove or concave portion is formed in the culture portion to increase surface area, then the culture area is increased, but it becomes very difficult to detach adherent cells from the culture vessel
Solution Approach 1:
The culture portion is divided into multiple stages (first stage, second stage, etc.) with grooves formed between them. This segmentation increases the total culture surface area while the grooves are designed with specific dimensions (depth ≤ 1mm, inclination angle ≤ 80°) to allow easy cell detachment, resolving the contradiction between increased culture area and ease of cell recovery
Solution Approach 2:
The groove parameters (depth, inclination angle) are specifically optimized to enable easy cell detachment. By controlling the groove depth to 1mm or less and the inclination angle to 80 degrees or less, the substrate allows cells to be easily detached by tapping, thus resolving the contradiction between increased surface area and ease of operation
2Strength
If a rigid vessel with thick substrate is used to form special-shaped grooves, then the structure is stable, but it is difficult to sufficiently detach adherent cells by applying impact
Solution Approach 1:
The substrate thickness is specifically controlled to be thin (allowing groove depth ≤ 1mm) to enable easy cell detachment by impact, while the overall vessel structure maintains stability through proper design. This parameter optimization resolves the contradiction between structural strength and ease of cell detachment
3Productivity
If a multistage cell culture vessel is used to culture adherent cells in large quantities, then the cell yield is increased, but performing pipetting in each stage becomes extremely troublesome
Solution Approach 1:
The culture vessel is designed with multiple stages stacked vertically, each providing culture surface area. This segmentation enables large-scale cell culture (increased productivity) while the standardized groove design in each stage facilitates uniform and easier cell recovery operations compared to conventional single-stage vessels
4Area of stationary object
If the groove depth is increased to increase culture area, then more surface area is available for cell attachment, but the distance from the crest to the other surface exceeds 1mm making cell detachment difficult
Solution Approach 1:
The groove depth parameter is specifically optimized to be 1mm or less, balancing the need for increased culture surface area with the requirement for easy cell detachment. This parameter control resolves the contradiction between maximizing culture area and maintaining ease of operation
Data Source
AI summary
An adherent cell culture substrate, which is a sheet-shaped substrate used for producing a culture vessel for adherent cells, includes a groove including a crest-shaped portion and a valley-shaped portion on one surface side of the substrate, in which a distance from a top end portion of the crest-shaped portion to the other surface of the substrate is 1 mm or less. Further, it is preferable that a cross section of the groove perpendicular to a direction in which the groove extends is formed in a substantially V-shape and an inclination angle of a side surface of the substantially V-shape of the groove is 80 degrees or less. Further, it is preferable that a plurality of the grooves are linearly arranged in parallel and the top end portions of the crest-shaped portions are formed in a linear shape.