Multi-Well Plate Reader With Independent Optical Stimulus and Readout
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Solution Overview
Problem
Current drug discovery methods for neurological disorders are hindered by the lack of translatable assays that can predict human efficacy and provide high throughput, with existing instruments damaging cells and requiring expensive specialized plates, and chemical stimuli failing to reflect physiological processes.
Innovation Solution
A multi-well plate reader with independent optical channels that transmit and detect light at multiple spectrally distinct wavelengths, enabling optogenetic assays with uniform illumination and high-throughput screening, using beam shaping optics and sCMOS image sensors to analyze cellular activity without physical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If physical electrodes are used for stimulation and recording, then automated electrophysiology measurements can be obtained, but cell membranes are damaged and cells cannot be reused
Solution Approach 1:
The patent replaces physical electrodes with optical channels that use light to stimulate and detect cellular activity. This substitution eliminates mechanical contact with cells, avoiding membrane damage while maintaining automated measurement capabilities. The optical system uses non-invasive light-based interaction to achieve the same functional goals without the harmful mechanical effects of electrode insertion.
Solution Approach 2:
The patent introduces optical channels as an intermediary medium between the measurement system and cells. Instead of direct physical contact through electrodes, light serves as the intermediary that transfers energy and information to and from the cells, enabling measurement without direct mechanical interaction and thus preventing cell damage.
2Productivity
If chemical stimuli are used to activate cellular activity, then FLIPR measurements can be obtained, but the stimuli may not reflect physiological processes or in vivo cellular activity
Solution Approach 1:
The patent changes the stimulation parameter from chemical to optical. By using light of specific wavelengths to activate optogenetic actuators in cells, the system achieves physiological relevance because optogenetic actuators respond to light in a manner that more closely mimics natural cellular processes. This parameter change allows the system to maintain high throughput while improving the reliability and physiological accuracy of cellular responses.
3Measurement precision
If electrical field stimulation is used with fluorescent readout, then cellular activity can be measured, but voltage control is limited and field nonuniformities cause overstimulation or electroporation
Solution Approach 1:
The patent implements local quality control by providing independent voltage control for each optical channel. This allows precise adjustment of stimulation parameters for individual channels, ensuring uniform and controlled light delivery to cells. The system can optimize each channel's output to avoid overstimulation and electroporation while maintaining accurate fluorescent detection, addressing both measurement precision and cell safety.
4Productivity
If dissociated cells are used for automated electrophysiology, then measurements can be obtained, but neurons and other cell types are damaged and cellular compartments are lost
Solution Approach 1:
The patent replaces the mechanical dissociation process with an optical measurement system. By using optical channels to stimulate and detect activity in intact cells, the system eliminates the need for cell dissociation. This allows neurons and other sensitive cell types to remain in their native, undamaged state with all cellular compartments intact, while still enabling automated high-throughput measurements.
5Measurement precision
If specialized assay plates are used for automated electrophysiology, then cell measurements can be obtained, but the assays become expensive
Solution Approach 1:
The patent creates a universal platform where optical channels can measure multiple parameters (fluorescence, light transmission, scattering) using the same basic hardware. This multi-functionality eliminates the need for specialized assay plates for different measurement types. Standard plates can be used for multiple assay formats, significantly reducing the cost of specialized consumables while maintaining measurement precision through the versatile optical detection system.
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 sensitive optical detection and stimulation of living cells, allowing for high-throughput drug screening and characterization of neural activity, reducing cell damage and cost, while providing uniform illumination and improved spatial resolution.
Implementation Method 1
a plurality of independent optical channels, wherein each channel transmits light to, and detect subsequent emission from, samples in a set of wells of a multi-well plate at a plurality of spectrally-distinct wavelengths
Implementation Method 2
optical reporters of cellular activity... detect subsequent emission from, samples
Data Source
AI summary
The invention provides a multi-well plate reader for providing simultaneous transmission of stimulation light to, and detection of emission light from, individual wells of a multi-well plate at a plurality of distinct wavelengths.