Microfluidic 3D Motor Unit Models for ALS Drug Screening
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Solution Overview
Problem
Current in vitro models for studying neurodegenerative diseases like ALS lack the ability to mimic in vivo conditions, limiting the scope of drug development and treatment options.
Innovation Solution
A microfluidic device is developed that allows for the coculture of neuronal and muscle cells, forming a three-dimensional neuromuscular junction, enabling the monitoring of molecular, biochemical, and morphological differences in healthy and diseased cells, and testing compounds for therapeutic effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional in vitro culture methods are used, then the model is simple to maintain, but it cannot mimic in vivo conditions
Solution Approach 1:
The patent introduces a microfluidic device as an intermediary system that bridges the gap between simple in vitro cultures and complex in vivo conditions. The device creates controlled microenvironments with specific flow patterns, oxygen gradients, and nutrient delivery systems that mimic physiological conditions without requiring actual in vivo systems.
Solution Approach 2:
The invention transitions from traditional two-dimensional flat cultures to three-dimensional spheroid structures. This dimensional change allows cells to self-organize into more physiologically relevant configurations, improving the reliability of disease modeling while maintaining in vitro simplicity.
2Measurement precision
If 3D motor unit formation is implemented, then the model accuracy improves, but the device complexity increases
Solution Approach 1:
The microfluidic device is designed with multi-functionality, serving as both a culture chamber and a measurement platform. It integrates neuronal cell culture, muscle cell culture, and contractility measurement capabilities within a single system, reducing the need for multiple separate devices while maintaining high measurement precision.
Solution Approach 2:
The patent combines previously separate experimental components into an integrated microfluidic system. Neuronal cells, muscle cells, and measurement mechanisms are merged into a single coordinated platform that enables simultaneous culture and assessment of motor unit formation and function.
3Reliability
If coculture of neuronal and muscle cells is performed, then the physiological relevance increases, but the difficulty of detecting and measuring increases
Solution Approach 1:
The system enables self-service monitoring where the physiological interactions between neuronal and muscle cells automatically generate measurable outputs. The formation of functional neuromuscular junctions naturally produces contractile responses that can be detected, eliminating the need for complex external intervention or invasive measurement techniques.
Data Source
AI summary
Microfluidic devices with neuronal cells, muscle cells, and optionally other cell types co-cultured therein are provided. Typically one or more the cells has a mutation that contributes to or causes a neuronal or muscular disease or disorder. For example, in some embodiments, one or more of the cultured cells are derived from a subject with a neuronal or muscular disease or disorder. The microfluidic device can facilitate formation of a 3D motor unit and a neuromuscular junction in vitro, and be used to monitor the molecular, biochemical, cellular, and morphological differences in the formation of such structures by healthy and diseased cells, and for testing compounds, dosages of compounds, dosing regimes, and combinations thereof, that may improve or worsen their formation. An exemplary combination drug therapy identified in this way is also provided.