Energy Transfer Dye Conjugates for Multiplex PCR Signal Interference
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Solution Overview
Problem
Current multiplex PCR assays are limited by the number of fluorophores and probes that can be effectively measured in a single reaction, due to signal interference and the need for unique spectral profiles, which restricts the number of targets that can be analyzed.
Innovation Solution
Development of energy transfer fluorescent dye conjugates with a donor dye, an acceptor dye, and a linker, which allows for increased multiplexing capabilities by utilizing unique optical properties and spectral channels already available on some commercial instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple fluorophores are used in a single multiplex PCR reaction, then the number of targets that can be analyzed increases, but signal interference between fluorophores increases and measurement precision deteriorates
Solution Approach 1:
The patent transitions from traditional single-fluorophore detection to a two-dye energy transfer system, adding a dimensional aspect to fluorescence detection. By using a donor dye and acceptor dye pair where energy transfers between them, the system creates new spectral detection channels that don't rely solely on emission wavelength separation, thereby reducing signal interference and improving measurement precision while maintaining high productivity
Solution Approach 2:
The patent changes the detection parameters by utilizing energy transfer efficiency and spectral channel characteristics rather than relying only on emission wavelength differences. By optimizing the donor and acceptor dye selection based on their energy transfer properties and matching them with appropriate spectral channels, the system achieves reduced signal interference and improved measurement accuracy while analyzing multiple targets
2Measurement precision
If traditional fluorophores with unique spectral profiles are used, then signal interference is reduced, but the number of fluorophores that can be effectively measured is limited
Solution Approach 1:
The patent makes the energy transfer dye conjugates universally applicable across multiple spectral channels by optimizing their emission spectra to match available instrument channels. The donor and acceptor dyes are selected and characterized to ensure their energy transfer properties work effectively with standard commercial qPCR instruments, allowing the same dye conjugate structure to be used in various multiplex configurations without requiring custom instrumentation
Solution Approach 2:
By introducing energy transfer as an additional detection dimension beyond traditional emission wavelength separation, the patent enables more fluorophores to be measured simultaneously. The energy transfer process creates distinct spectral signatures that can be detected in available channels, effectively increasing the capacity for multiplexing beyond what traditional fluorophore selection alone would allow
3Productivity
If more probes are added to increase multiplexing capability, then the number of targets detectable increases, but the complexity of the assay system increases
Solution Approach 1:
The patent merges the functions of multiple probes by using energy transfer dye conjugates where the energy transfer process itself provides the detection mechanism. Instead of requiring separate detection channels for each probe, the energy transfer between donor and acceptor dyes creates a unified detection approach that simplifies the overall assay system while maintaining high multiplexing capability
Solution Approach 2:
The energy transfer dye conjugates are designed to be universally detectable across multiple spectral channels, allowing a single probe design to work in various multiplex configurations. This universality reduces the need for highly specialized probe designs for each target, thereby reducing overall assay system complexity while maintaining high productivity
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 use of energy transfer dye conjugates enables higher order multiplexing, allowing for the detection and quantification of multiple targets in a single PCR reaction with increased sensitivity and reduced signal interference.
Implementation Method 1
Fluorescence resonance energy transfer (FRET) within dual-labeled oligonucleotide probes is widely used in assays for genetic analysis. FRET can occur between reporter and quencher groups and can involve different modes of energy transfer (ET). For example, energy transfer can involve fluorescence quenching mechanisms whereby an excitation electron can be transferred from a donor molecule to an acceptor molecule via a non-radiative path when there is interaction between the donor and acceptor.
Data Source
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AI summary
Energy transfer dye pairs including a donor dye covalently attached to an acceptor dye through a linker, uses of the energy transfer dye pairs, for example, in conjugates of an energy transfer dye pair covalently attached to a quencher and an analyte (e.g., an oligonucleotide), for biological applications including, for example, amplification assays such as quantitative polymerase chain reaction (qPCR) and digital polymerase chain reaction (dPCR). Systems and methods include those in which (1) two dyes have the same excitation wavelength range, but different emission wavelength ranges and/or (2) two dyes have the same emission wavelength range, but different excitation wavelength ranges.