Cell Cluster Production Using Centrifuged Micro-Recesses
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Solution Overview
Problem
Existing methods for producing cell clusters, such as organoids, often result in non-uniform sizes and structures, leading to inconsistencies in in vitro studies, which can differ from in vivo results.
Innovation Solution
A production method involving centrifugation of a cell suspension into wells with recesses of specific dimensions and configurations, combined with the use of cell-non-adhesiveness surfaces and extracellular matrix, to form uniformly sized cell clusters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cell culture methods are used, then cell clusters can be formed, but the cell clusters exhibit non-uniform sizes and structures
Solution Approach 1:
The culture container bottom is segmented into multiple recesses, each serving as an independent micro-environment for cell cluster formation. This segmentation allows precise control over cell suspension distribution and enables uniform cell cluster sizes while maintaining a relatively simple overall container structure.
Solution Approach 2:
The recesses provide localized controlled environments with specific geometric parameters (depth, opening area, volume) that differ from the bulk culture medium. This local quality control ensures uniform cell cluster formation in each recess while the rest of the system remains simple.
2Manufacturing precision
If cell suspension is simply added to culture wells, then the process is simple, but cell clusters form with inconsistent sizes
Solution Approach 1:
The recesses are pre-formed in the culture container bottom before cell suspension addition. This preliminary structural preparation ensures that when cell suspension is added, the cells are automatically positioned and confined to uniform volumes, achieving consistent cell cluster sizes without complex addition procedures.
Solution Approach 2:
By controlling specific parameters of the recesses (opening area ≤1 mm², depth 100-1000 μm, volume 0.1-10 μL), the system achieves uniform cell cluster formation. These parameter specifications provide precise control while maintaining ease of manufacture through standard fabrication techniques.
3Manufacturing precision
If cells are cultured in unlimited space, then cell growth is unrestricted, but cell clusters become non-uniform in size
Solution Approach 1:
The culture system is segmented into discrete recesses that physically limit cell cluster expansion. Each recess acts as an independent containment unit, ensuring uniform sizes while allowing flexible adjustment of culture conditions (cell type, medium composition, centrifugal force) across different experiments.
Solution Approach 2:
The recess parameters (volume 0.1-10 μL, opening area ≤1 mm²) are optimized to constrain cell cluster size. These fixed geometric parameters provide uniformity, while other culture parameters (temperature, pH, cell concentration) remain adjustable to maintain versatility.
4Manufacturing precision
If centrifugal force is not applied, then the culture process is simple, but cell suspension does not distribute uniformly into recesses
Solution Approach 1:
Centrifugal force creates a uniform potential gradient that drives cell suspension into the recesses. By applying controlled centrifugal acceleration (200-1000×g), the system achieves uniform cell distribution across all recesses without complex mechanical positioning systems.
Solution Approach 2:
The centrifugal field acts as a hydraulic force that moves the cell suspension medium and dispersed cells into the recesses. This fluid dynamic approach simplifies the system by using force fields rather than mechanical pumps or valves to achieve uniform distribution.
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
This method ensures the production of uniformly sized cell clusters, enhancing the reliability and consistency of in vitro studies by mimicking in vivo conditions.
Implementation Method 1
a step in which the cell-cultivation container is centrifuged to move the dispersed cells in the recesses
Data Source
AI summary
This method for producing a cell cluster group comprises: a step for putting, into a well, a cell suspension obtained by suspending dispersed cells in a medium, using a cell incubator which includes the well and two or more recesses formed in the bottom of the well and in which the area of an opening of each recess in plan view is at most 1 mm2; a step for centrifuging the cell incubator; and a step for culturing the dispersed cells in the recesses.