Angled Microcavity Vessel for Spheroid Retention During Media Exchange
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Solution Overview
Problem
Existing cell culture vessels face challenges in maintaining the integrity of three-dimensional cell cultures during media changes, as the displacement of spheroids from microcavities can occur due to the binding properties of the surface coatings, leading to disruption and reduced long-term culture viability.
Innovation Solution
A cell culture vessel design featuring a base plane and cell culture chambers with angled bottom surfaces, allowing liquid to flow through the vessel by gravity, minimizing the dislodgment of spheroids during media exchange, and incorporating microcavities with non-binding coatings to promote three-dimensional cell growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If media exchange is performed in cell culture vessels, then nutrient supply and waste removal are improved, but spheroid displacement from microcavities occurs due to surface coating binding properties
Solution Approach 1:
The microcavity structure is segmented into multiple depth levels with varying binding characteristics. The shallower regions provide weak binding for media exchange, while deeper regions maintain strong binding for spheroid retention. This segmentation allows different zones to serve different functions during media exchange operations.
Solution Approach 2:
Different regions of the microcavity have different surface coating binding properties. The patent applies local quality variations where certain areas have enhanced binding affinity for spheroids while other areas have reduced binding to facilitate media flow and exchange. This creates functional zonation within the microcavity structure.
2Stability of the object's composition
If surface coatings with high binding properties are used, then cell attachment and three-dimensional growth are improved, but spheroid displacement during media changes increases
Solution Approach 1:
The microcavity structure is segmented into multiple depth levels with varying binding characteristics. The shallower regions provide weak binding for media exchange, while deeper regions maintain strong binding for spheroid retention. This segmentation allows different zones to serve different functions during media exchange operations.
Solution Approach 2:
Different regions of the microcavity have different surface coating binding properties. The patent applies local quality variations where certain areas have enhanced binding affinity for spheroids while other areas have reduced binding to facilitate media flow and exchange. This creates functional zonation within the microcavity structure.
3Ease of manufacture
If conventional flat-bottomed vessels are used, then manufacturing simplicity is maintained, but three-dimensional cell culture physiological accuracy is reduced
Solution Approach 1:
The patent transitions from conventional two-dimensional flat-bottomed vessels to three-dimensional microcavity structures. This dimensional change enables cells to grow in a more physiological three-dimensional configuration that better replicates in vivo conditions, while the microcavities are integrated into the vessel base to maintain manufacturing feasibility.
Solution Approach 2:
Multiple microcavities are nested within the base structure of the vessel, creating a hierarchical structure where smaller culture chambers are embedded within the larger vessel framework. This nesting approach enables complex three-dimensional cell culture capabilities while maintaining overall vessel simplicity and manufacturability.
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 design enhances the long-term culture of spheroids by reducing the risk of displacement during media changes, maintaining the integrity of three-dimensional cell structures and facilitating more physiologically accurate cell growth, which is crucial for studying diseases, toxicology, and medication efficacy.
Implementation Method 1
allowing liquid to flow through the vessel by gravity
Data Source
AI summary
A cell culture vessel includes a base defining a base plane extending in a first direction and a second direction perpendicular to the first direction, a plurality of cell culture chambers stacked one atop another, each cell culture chamber having a top, a bottom and sidewalls, each of the top, bottom and sidewalls having an interior surface, wherein at least the bottom surface has an array of microcavities supporting the culture of cells as spheroids and each bottom surface is at an angle with respect to the plane of a table or surface upon which the vessel sits. Further, liquid can flow into each cell culture chamber via an inlet and out of each cell culture chamber via an outlet. The angled cell culture surface allows the cell culture chambers to be perfused or allows media changes without dislodging spheroids from microcavities.