Microfluidic Device for Myocardial Ischemia Simulation
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Solution Overview
Problem
Current in vitro models for studying myocardial ischemia are limited in their ability to accurately simulate the physiological conditions of ischemia and hypoxia, leading to incomplete understanding and ineffective therapeutic development.
Innovation Solution
A microfluidic device is developed that mimics the microenvironment of myocardial tissue by creating a synthetic or idealized microvascular network, allowing for controlled induction of ischemia and hypoxia through selective blockage of oxygen and nutrient flow, thereby simulating the blockage of coronary arteries and studying the effects on cardiomyocytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional in vitro models use Petri dishes with coverslips to restrict nutrient supply, then ischemic zones can be created, but the models fail to accurately simulate physiological microenvironment and produce incomplete understanding
Solution Approach 1:
The patent creates a synthetic microvascular network that copies the physiological microenvironment of myocardial tissue, including endothelial cells lining channels and pericytes surrounding them. This copying approach allows accurate simulation of blood flow, oxygen delivery, and tissue microenvironment without using complex animal models, thereby improving reliability while maintaining manageable device complexity
Solution Approach 2:
The device segments the microenvironment into distinct functional zones: endothelial cell-lined channels for blood flow simulation, pericyte-surrounded regions for oxygen delivery control, and myocardial tissue chambers for cell culture. This segmentation enables independent control of each component to accurately simulate physiological conditions
2Measurement precision
If animal models are used to study myocardial ischemia, then detailed representation of ischemic conditions can be obtained, but the experiments become expensive, technically complex and raise ethical concerns
Solution Approach 1:
The patent creates a synthetic microvascular network that copies the physiological microenvironment of myocardial tissue, including endothelial cells lining channels and pericytes surrounding them. This copying approach allows accurate simulation of blood flow, oxygen delivery, and tissue microenvironment without using complex animal models, thereby improving reliability while maintaining manageable device complexity
Solution Approach 2:
The device allows precise control of physiological parameters including flow rate through the synthetic vasculature, oxygen concentration in the media, and nutrient delivery. By independently adjusting these parameters, the system can simulate various ischemic conditions with high measurement precision while avoiding the technical complexity of animal models
3Ease of manufacture
If conventional in vitro methods alter cellular metabolism with chemical agents, then ischemic conditions can be induced, but the models lack physiological relevance and fail to accurately represent ischemia
Solution Approach 1:
The patent uses a microfluidic pumping system to control fluid flow through the synthetic microvascular network. By adjusting pump rates, the system can simulate normal blood flow, reduced flow during ischemia, and reperfusion conditions. This hydraulic approach provides physiological relevance while maintaining ease of operation through simple pump control
Solution Approach 2:
The device allows precise control of physiological parameters including flow rate through the synthetic vasculature, oxygen concentration in the media, and nutrient delivery. By independently adjusting these parameters, the system can simulate various ischemic conditions with high measurement precision while avoiding the technical complexity of animal models
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 device enables more physiologically relevant studies of ischemia and hypoxia, facilitating the development of new therapeutics by accurately reproducing the microenvironment of myocardial tissue and allowing for real-time visualization and high-throughput screening of therapeutic agents.
Implementation Method 1
A microfluidic device is developed that mimics the microenvironment of myocardial tissue by creating a synthetic or idealized microvascular network, allowing for controlled induction of ischemia and hypoxia through selective blockage of oxygen and nutrient flow
Implementation Method 2
The device enables more physiologically relevant studies of ischemia and hypoxia, facilitating the development of new therapeutics by accurately reproducing the microenvironment of myocardial tissue
Data Source
AI summary
A method of inducing ischemia includes: providing a cell culture device having a first cell culture in an internal chamber and a second cell culture in at least one fluid channel and a perfusion modulating system that causes changes in oxygen flow in the internal chamber and/or at least one fluid channel; flowing liquid media having oxygen through the internal chamber and at least one fluid channel of the cell culture device; modulating oxygen perfusion in the internal chamber with the perfusion modulating system by varying and selectively blocking the flow rate of at least one of the liquid media or oxygen through the internal chamber to induce varying levels of ischemia; and assaying for ischemia in the first cell culture.