ChemFET Sensor Arrays With Fluidic Control for Single-Cell Analysis
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Solution Overview
Problem
Current methods for electrophysiological and metabolic phenotyping of cells, such as patch clamp and microelectrode voltammetry, are cumbersome and inefficient, limiting the ability to accurately measure single cell behavior and metabolic functions in large populations.
Innovation Solution
A cell analysis system utilizing ChemFET sensor arrays with subcellular addressability, combined with an automated fluidic system and precision temperature control, enables real-time electrical and metabolic measurements of single cells with simultaneous data acquisition and imaging, allowing for controlled reagent delivery and gas equilibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If patch clamp and microelectrode voltammetry methods are used, then electrical measurements of single cells can be obtained, but the methods are cumbersome and inefficient
Solution Approach 1:
The patent divides the measurement function into multiple independent ChemFET sensors arranged in arrays, where each sensor can independently measure electrical parameters of single cells. This segmentation allows parallel measurement of multiple cells simultaneously, reducing operational complexity while maintaining measurement precision through standardized sensor designs
Solution Approach 2:
The patent replaces the mechanical patch clamp technique with ChemFET sensors that detect electrical parameters through field effects. This substitution eliminates the need for manual mechanical manipulation of electrodes, automating the measurement process and significantly reducing operational complexity while maintaining measurement capability
2Quantity of substance
If population-level biochemical workflows are used, then metabolic function interrogations can be performed, but single cell behavior analysis is inefficient
Solution Approach 1:
The patent segments the cell population into individually addressable units by positioning cells over specific ChemFET sensors in arrays. Each sensor monitors a single cell or small group of cells, enabling simultaneous analysis of multiple cells what would traditionally require sequential population-level processing, thereby reducing total analysis time while maintaining throughput
Solution Approach 2:
The patent transitions from two-dimensional population averaging to three-dimensional single-cell resolution by adding the spatial dimension of individual cell positioning over sensor arrays. This dimensional enhancement allows parallel processing of multiple cells without increasing biochemical workflow complexity, effectively reducing analysis time per cell
3Measurement precision
If ChemFET sensor arrays with small pitch are used, then subcellular addressability is achieved, but device manufacturing complexity increases
Solution Approach 1:
The patent achieves subcellular addressability by optimizing the pitch parameter of ChemFET sensors to fall within the range of about 3.36 μm to about 850 nm. This parameter selection balances the need for high spatial resolution with the practical constraints of semiconductor manufacturing capabilities, ensuring that sensors can be precisely positioned without requiring extreme manufacturing tolerances
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 system provides high-resolution, real-time analysis of single cell electrical and metabolic activity with subcellular precision, overcoming the limitations of existing methods by enabling accurate and efficient measurement of cellular responses and metabolic functions.
Implementation Method 1
ChemFET sensors can be used to detect changes in ion concentrations, pH, and other parameters of the cellular environment
Data Source
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AI summary
Systems, devices and methods for cell analysis provide an end user with real-time cell analysis and imaging of single cells in a population. Various cell analysis systems can provide both optical imaging, as well as electroscopic imaging, which is an image of cellular response as detected by sensors covering a cell footprint or cellular efflux. An automated fluidic system can provide an end-user selected sequence of reagents to cells, while precision controlled sensor array device thermostatting, and analysis compartment environmental control provide consistency in the cell analysis system environment.