Multiwell Microelectrode Array with Integrated Optical Stimulation
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Solution Overview
Problem
Conventional multiwell microelectrode arrays are limited in their ability to deliver selective stimulation to cell cultures, as electrical stimulation can excite all nearby cells regardless of type and creates artifacts in recordings, while optogenetic techniques offer a more selective method but require precise light delivery.
Innovation Solution
A multiwell microelectrode array system with integrated optical stimulation capabilities, featuring independently controllable light-emitting elements and electrode sets for simultaneous electrical recording and optical stimulation, allowing for targeted cell manipulation and minimal artifact creation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical stimulation is used to manipulate cell cultures, then cell activity can be controlled, but stimulation artifacts are created in recordings and all nearby cells are excited regardless of type
Solution Approach 1:
The patent introduces light as an intermediary medium to indirectly stimulate cells expressing light-sensitive opsins, rather than directly applying electrical stimulation. This mediator approach allows selective activation of specific cell types through optical means while keeping electrical recording electrodes separate from the stimulation source, thereby eliminating stimulation artifacts in electrical recordings while maintaining selectivity.
2Measurement precision
If multiple single-well measurement test beds are used to test multiple cell or tissue samples, then each sample can be tested individually, but significant monetary investment and time allocation are required
Solution Approach 1:
The patent merges multiple single-well measurement capabilities into a single multiwell platform where multiple cell or tissue samples can be tested simultaneously in different wells. Each well maintains its own electrode array for independent electrical recording, allowing parallel processing of multiple samples which dramatically increases productivity while preserving the ability to analyze individual samples separately.
Solution Approach 2:
The multiwell MEA platform provides universal functionality by enabling simultaneous testing of multiple different cell or tissue samples across multiple wells, making the system adaptable to various experimental configurations and sample types without requiring separate dedicated equipment for each sample.
3Ease of operation
If electrical stimulation pulses are delivered to excite nearby cells, then cell activity can be manipulated, but the amount of charge injection required can saturate sensitive electronics and leave residual charge on electrodes
Solution Approach 1:
The patent replaces the electrical stimulation mechanism with an optical stimulation mechanism. Instead of delivering electrical pulses that require charge injection and risk saturating electronics, the system uses light delivery to activate cells expressing light-sensitive opsins. This substitution eliminates the charge injection problem entirely while maintaining the ability to manipulate cell activity, and keeps the electrical recording electrodes free from residual charge artifacts.
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 selective control of cell networks with reduced stimulation artifacts, providing a cost- and time-efficient platform for large-scale in vitro testing and precise manipulation of cell cultures using optogenetic methods.
Implementation Method 1
at least one light-emitting element set corresponding to a respective one of the plurality of wells and configured to deliver optical stimulation to at least a portion of the respective well
Implementation Method 2
Each electrode set comprises at least one electrode configured to collect an electric signal associated with at least a portion of the respective well
Data Source
AI summary
An electro-optical stimulation and recording system is disclosed, including a substrate and a plurality of wells coupled to the substrate. The system also includes at least one electrode set disposed proximate a respective one of the plurality of wells, wherein the electrode set comprises at least one electrode configured to collect an electric signal associated with at least a portion of the respective well. The system also includes a light-emitting element set corresponding to a respective one of the wells and configured to deliver optical stimulation to at least a portion of the respective well.