Single-Channel PCR Multiplexing via Spectral Unmixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multiplexed real-time quantitative polymerase chain reaction (qPCR) technologies require multiple detection channels and reporters with different spectra, leading to increased complexity and cost, as well as inefficiencies in signal detection due to overlapping emission spectra, which complicates the detection and quantification of multiple amplicons.
Innovation Solution
A method and algorithm that enable multiplexed qPCR using a single channel detector and non-specific dyes with a shared emission spectrum, allowing for the detection and quantification of multiple amplicons through mathematical analysis of a sum amplitude signal, reducing hardware requirements and improving signal intensity by utilizing a wider bandwidth for detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple detection channels and reporters with different spectra are used for multiplexed qPCR, then different amplicons can be detected, but device complexity and cost increase
Solution Approach 1:
The patent merges multiple detection channels into a single detection channel by using a single excitation wavelength and detecting emission spectra through one detector. Multiple amplicons are detected simultaneously in a single channel by analyzing their unique emission spectral signatures, thereby reducing device complexity while maintaining detection capability
Solution Approach 2:
The patent makes a single detection channel universal for detecting multiple different amplicons by utilizing the unique emission spectra of different reporters. One detection channel performs the function of multiple channels by resolving spectral overlap through mathematical analysis and spectral unmixing algorithms
2Adaptability or versatility
If reporters with different spectra are used for each amplicon, then multiplexed detection is enabled, but signal detection efficiency decreases due to overlapping emission spectra
Solution Approach 1:
The patent introduces mathematical analysis algorithms and spectral unmixing methods as intermediaries between the overlapping emission spectra and the detection signal. These computational tools separate and resolve the overlapping spectra, enabling accurate quantification of individual amplicons even when their emission spectra overlap in a single detection channel
Solution Approach 2:
The patent changes the detection parameter from separate wavelength-specific detection to simultaneous multi-wavelength detection with computational resolution. By collecting spectral information across a range of wavelengths and applying mathematical decomposition, the system achieves precise measurement of multiple amplicons despite spectral overlap
3Device complexity
If a single channel detector is used with non-specific dyes, then hardware requirements are reduced, but differentiation of multiple amplicons becomes more difficult
Solution Approach 1:
The patent utilizes differences in emission spectral characteristics (color changes) of different reporters excited at the same wavelength. Even though a single detector is used, each reporter produces a distinct spectral signature that can be resolved through spectral analysis, enabling differentiation of multiple amplicons without additional detection channels
Solution Approach 2:
The patent transitions from one-dimensional detection (single wavelength per channel) to multi-dimensional spectral detection within a single channel. By collecting and analyzing spectral information across multiple wavelengths simultaneously, the system creates an additional dimension for differentiating amplicons, effectively converting a single-channel system into a multi-parameter 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
This approach simplifies and cost-effectively enables the detection and quantification of multiple amplicons in a single channel, reducing errors and contamination risks, while allowing for more efficient signal collection and faster reaction times, and can be applied to various detection techniques beyond qPCR.
Implementation Method 1
reporters with different spectra (e.g. emission wavelengths) for each different amplicon
Data Source
AI summary
Methods and algorithms for a multiplexed single detection channel amplification process and quantification of generated amplicons is presented. Various mathematical approaches for quantifying and verifying the amplicons in a reaction are presented. Usage of such methods and approaches allow upgrading of existing single and multiple channel instruments for further multiplexing capabilities.