3D Cell Culture Microwells for Controlled Organotypic Structures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing in vitro models fail to accurately recapitulate the complex three-dimensional nature of organs, lacking cellular composition, tissue-tissue interfaces, organ-level structures, and fluid flows, and do not support the formation of spheroid and organotypic structures under well-controlled conditions, limiting preclinical drug screening and personalized medicine.
Innovation Solution
A three-dimensional cell culture platform with microwells and spacers that mimic the local tissue and organ microenvironment, allowing for the formation of complex tissue-like structures and co-culture with other cell types in a pre-defined supporting matrix, using a cell supporting medium with microwells and spacers to create a surface interface for cell growth and delivery of agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two-dimensional mono-culture systems are used for preclinical drug screening, then the simplicity of the system is maintained, but the ability to recapitulate complex tissue and organ microenvironment is lost
Solution Approach 1:
The invention transitions from two-dimensional cell culture surfaces to three-dimensional microwell structures within a hydrogel matrix. The microwells provide defined three-dimensional spaces that enable cells to form spheroids and organotypic structures, thereby recapitulating the spatial architecture and microenvironment of native tissues while maintaining system controllability
Solution Approach 2:
The system combines multiple materials and cell types within a single platform: a hydrogel matrix (cell supporting medium) provides the three-dimensional scaffold, microwell spacers define structured cavities, and multiple cell types are co-cultured together. This composite approach enables simultaneous maintenance of structural organization and biological complexity
2Reliability
If spheroids are grown large enough to generate oxygen and nutrient gradients, then cell-cell and cell-ECM interactions are improved, but the ability to expose cells to blood or nutrient rich medium is lost
Solution Approach 1:
The system segments the culture environment into distinct zones: the hydrogel matrix provides a three-dimensional scaffold for cell embedding and interaction, while microwells create discrete compartments that can be individually accessed. This segmentation allows large spheroids to form within microwells for accurate cell interactions, while the surrounding hydrogel matrix remains accessible to nutrient-rich medium through the entrance defined by micrawell spacers
3Reliability
If organoids are cultured as closed structures, then complex cellular composition is achieved, but direct access to the epithelial lumen and tissue-tissue interfaces is lost
Solution Approach 1:
The micrawell spacers act as intermediary structures that define the entrance to micrawells while maintaining the integrity of the hydrogel matrix. This intermediary structure allows the epithelial lumen to remain enclosed for complex cellular composition, while simultaneously providing a defined access point through the micrawell entrance for medium delivery and observation
4Reliability
If cells are embedded in a gel matrix system, then cell-cell and cell-matrix interactions are maintained, but the ability to incorporate other cell types in a controlled manner is limited
Solution Approach 1:
The system segments the cell population into distinct groups housed in separate micrawells. Each micrawell can contain a specific cell type or combination of cell types, embedded in the hydrogel matrix. This segmentation enables controlled co-culture of multiple cell types while maintaining their individual microenvironments and interactions with the matrix
Solution Approach 2:
The hydrogel matrix serves multiple functions: it provides the three-dimensional scaffold for cell embedding, maintains cell-matrix interactions, and allows for the incorporation of diverse cell types. The micrawell structure adds universal applicability by providing a standardized container that can accommodate different cell types and configurations
Data Source
AI summary
A three-dimensional cell culture platform includes a cell supporting medium having at least one microwell formed therein; and one or more microwell spacers defining an entrance of the or each microwell, the entrance enabling the introduction of a cell culture medium into the or each microwell. The volume of a microwell is determined by a surface of the one or more microwell spacers defining the entrance of the microwell, and by an interface of the cell supporting medium of the microwell. The one or more microwell spacers are in direct contact with the cell supporting medium prior to one or more cells being delivered to the three-dimensional cell culture platform.