Cell-Free Extract Calibration for Analyte Quantification
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Solution Overview
Problem
Current diagnostic systems for biological fluids and aqueous solutions face significant challenges in quantifying analytes due to inter-sample variability, particularly in complex samples like biological fluids, where matrix effects lead to inaccurate results and hinder the use of standard calibration approaches.
Innovation Solution
A method utilizing a cell-free extract (CFE) with a plurality of reference points, each corresponding to a distinct color representing a different analyte amount, allows for sample-specific calibration by determining a desired regulator amount, saturating analyte amount, and reaction time to generate a colorimetric gene product that corresponds to a known amount, thereby reducing or eliminating inter-sample variability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If standard calibration approaches are used in complex biological samples, then the measurement process is simple and equipment requirements are minimal, but matrix effects cause substantial variability and inaccurate results
Solution Approach 1:
The invention changes the calibration parameter from using external chemical standards to using sample-matched calibration curves generated from the actual biological samples. This parameter change allows the calibration to adapt to matrix effects in each sample, thereby maintaining measurement accuracy while keeping the system simple and equipment-minimal.
Solution Approach 2:
The invention creates a copy of the sample matrix within the calibration process by using the same biological sample for both calibration curve generation and analyte measurement. This copying approach ensures that matrix effects are identical in both calibration and measurement, eliminating their impact on accuracy while maintaining ease of use.
2Measurement precision
If sample-specific calibration is implemented to reduce inter-sample variability, then measurement accuracy improves, but the complexity of the diagnostic system increases
Solution Approach 1:
The invention implements self-service by enabling each biological sample to calibrate itself through automated generation of sample-specific calibration curves. The system uses the sample's own matrix characteristics to create the calibration curve, eliminating the need for complex external calibration procedures or specialized equipment, thus improving accuracy without significantly increasing system complexity.
3Ease of operation
If cell-free expression systems are used for quantitative measurement, then the system becomes portable and equipment-free, but the ability to perform robust quantification is limited by matrix effects
Solution Approach 1:
The invention applies preliminary action by generating the sample-specific calibration curve before performing the actual analyte quantification. This preliminary calibration step accounts for matrix effects in advance, ensuring that subsequent quantitative measurements are robust and reliable while maintaining the portability and equipment-free nature of the cell-free expression 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
This approach enables accurate and reliable quantification of analytes in biological and aqueous samples by accounting for matrix effects, providing a generalizable parallel calibration strategy that minimizes variability and enhances diagnostic accuracy.
Implementation Method 1
a colorimetric gene product is generated having a color corresponding to a color of a first reference point
Implementation Method 2
each reference point being a distinct color and corresponding to a different amount of the analyte
Data Source
AI summary
Disclosed herein are systems and methods for quantifying analytes in a desired complex solution with minimal inter-sample variability. The invention includes methods and diagnostic tools for quantifying analytes in aqueous solutions or biological fluid samples with sample-specific calibration and colorimetric or detectable output.