Microfluidic Organoid Chamber With Interstitial Flow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current in vitro systems for producing brain organoids fail to simulate an in vivo environment, leading to reproducibility issues, unphysiologic necrotic cores, and inadequate consideration of interstitial fluid flow, which is crucial for nutrient delivery and waste removal.
Innovation Solution
A microfluidic device with at least two fluid channels and a main chamber, featuring a slotted structure and pillars, allows for controlled interstitial fluid flow, supporting the cultivation of brain organoids under dynamic conditions, promoting neuronal and dopaminergic neuron marker expression, reducing necrotic cores, and enabling neurite outgrowth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional microwell and cell culture plate formats are used for organoid production, then the method is simple and well-established, but the organoids show reproducibility issues and unphysiologic necrotic cores due to lack of active nutrient and oxygen supply
Solution Approach 1:
The device segments the culture system into multiple independent microwells, each capable of producing organoids under controlled conditions. This segmentation allows for standardized, reproducible organoid formation while maintaining ease of manufacture through modular well structures
Solution Approach 2:
The invention introduces a microfluidic system with fluid channels that deliver culture medium actively to each microwell. This hydraulic approach replaces passive diffusion with controlled fluid flow, ensuring reliable nutrient and oxygen supply that eliminates necrotic cores while maintaining reproducibility
2Device complexity
If conventional cell culture plate formats are used, then the setup is simple, but there is no active removal of degradation products leading to inferior physiologic properties
Solution Approach 1:
The microfluidic system uses hydraulic flow to actively remove degradation products from each microwell through dedicated outlet channels. This active waste removal system enhances physiologic quality by preventing accumulation of toxic metabolites, while the integrated design keeps the system relatively simple
3Ease of operation
If static culture conditions are used, then the culture system is simple to operate, but organoids fail to experience mechanical stresses such as fluid flow that are important for physiologic function
Solution Approach 1:
The system transitions from static to dynamic culture conditions by implementing controlled fluid flow through the microwells. This dynamic approach exposes organoids to physiological mechanical stresses including shear stress and fluid flow, enhancing physiologic relevance while maintaining ease of operation through automated flow control
Solution Approach 2:
The microfluidic system uses hydraulic principles to generate controlled fluid flow that mimics in vivo conditions. This approach provides necessary mechanical stresses for organoid development and function, improving physiologic reliability while the system remains easy to operate through standardized fluid delivery
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
The microfluidic device enables long-term cultivation of mammalian cells, particularly iPSC-derived human midbrain organoids, maintaining high cellular viability and eliciting physiologically relevant phenotypes, facilitating drug screening applications with improved reproducibility and efficiency.
Implementation Method 1
the slotted structure (5) is permeable to a liquid
Implementation Method 2
Interstitial fluid flow not only plays an important role in the delivery of nutrients and removal of metabolic waste
Implementation Method 3
an array of pillars (8) extending from the inner top surface (6) into the cross section of the main chamber (3) in direction of the inner bottom surface (7)
Data Source
AI summary
The present invention relates to a microfluidic device (1) for cultivating cells, in particular for generating brain organoids, comprising at least two fluid channels (2) positioned essentially opposite to each other and a main chamber (3) located between the fluid channels (2), wherein the main chamber (3) comprises at least one preferably sealable access opening, and each of the at least two fluid channels (2) is fluidly connected to the main chamber (3) at at least one point of contact (4), wherein a slotted structure (5) is provided at each point of contact (4) separating the main chamber (3) from the respective fluid channel (2), wherein the slotted structure (5) is permeable to a liquid.