Discrete Microenvironment Chamber for Ischemia Gradient Sampling
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Solution Overview
Problem
Existing experimental models fail to accurately recreate the tissue microenvironment and allow sampling of cells and media while retaining environmental conditions, making it difficult to study the effects of ischemia on cells in pathologies such as cancer and vascular stroke.
Innovation Solution
A discrete microenvironment chamber (DIMIC) device that mimics local tissue conditions by creating gradients of ischemia through diffusion and metabolite consumption, allowing extraction of cells and media from different local environments for biochemical analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in vivo experiments are used to study ischemic conditions, then the environmental context is preserved, but the experiments are prohibitively expensive and require destruction of tissue microarchitecture
Solution Approach 1:
The patent creates a simplified copy of the in vivo tissue microenvironment using a microfabricated chamber that replicates key features such as endothelial-lined channels, extracellular matrix, and controlled flow conditions. This allows study of ischemic conditions without requiring expensive animal models while preserving the essential environmental context through engineered tissue constructs
2Ease of manufacture
If conventional in vitro experiments are used, then the experiments are simple and affordable, but they cannot accurately mimic ischemic conditions and tissue complexities
Solution Approach 1:
The patent implements local quality by creating spatially heterogeneous conditions within the microenvironment chamber, including regions with varying oxygen levels, nutrient concentrations, and flow rates that mimic the heterogeneity of actual ischemic tissue. Different zones within the same chamber can support different cell types and metabolic states, accurately representing the complexity of diseased organs
3Quantity of substance
If tissue microarchitecture is destroyed for analysis, then biochemical sampling is enabled, but the environmental context information is lost
Solution Approach 1:
The patent divides the tissue microenvironment into discrete, addressable units within the microfabricated chamber, allowing selective sampling from specific regions while preserving the overall architectural context. The modular design enables researchers to extract samples from targeted zones without disrupting the entire tissue construct, maintaining spatial information about the environmental gradients and cell-cell interactions
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
Enables the study of ischemia's effects on cells with unprecedented cellular and molecular resolution, facilitating the analysis of metabolic changes and cell interactions, and is versatile, scalable, and affordable.
Implementation Method 1
creating gradients of ischemia through diffusion and metabolite consumption
Data Source
AI summary
The present invention provides a discrete microenvironment chamber (DIMIC) configured to accurately mimics the microenvironment of poorly perfused tissue. In one embodiment, the DIMIC of the present invention is further designed to allow the extraction of cells and media from different local environments for any type of biochemical analysis.