Metabolic Chip Derivatization for Broad-Range Metabolite Quantification
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Solution Overview
Problem
Current metabolomics platforms struggle with full-spectrum quantitative detection of metabolites due to high chemical diversity and wide concentration ranges, limiting clinical applicability and accuracy in metabolic disorder diagnosis.
Innovation Solution
A method involving derivatization of biological samples with 3-nitrophenylhydrazine and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, followed by liquid chromatography-mass spectrometry, using a metabolic chip for simultaneous detection of multiple metabolic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods (HPLC, GC-MS, LC-MS) are used to achieve accurate metabolite quantification, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The detection system is segmented into distinct functional modules: microfluidic sample preparation zone, reaction zone with immobilized enzymes, and detection zone with electrodes. This modular segmentation allows each component to be optimized independently while maintaining overall system simplicity, resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
Immobilized enzymes are introduced as intermediaries that catalyze specific metabolic reactions, converting target metabolites into detectable products. This intermediary approach enables selective and sensitive detection of individual metabolites using simple electrochemical sensors, achieving high measurement precision without requiring complex mass spectrometry systems
2Measurement precision
If conventional detection methods are used, then measurement precision is improved, but ease of operation deteriorates due to complex sample preparation and analysis procedures
Solution Approach 1:
Multiple detection functions are merged into a single integrated microfluidic chip that performs sample introduction, separation, reaction, and detection in one continuous flow system. This merging eliminates the need for separate complex preparation steps and multiple instruments, dramatically improving ease of operation while maintaining measurement precision through controlled flow conditions
Solution Approach 2:
The microfluidic system incorporates self-regulating features including passive sample separation based on flow dynamics, automated reagent mixing through diffusion and flow control, and in-situ detection without requiring external intervention. The system performs sample preparation and analysis automatically as the sample flows through, making operation simple while achieving precise metabolite quantification
3Measurement precision
If high-performance detection instruments are used, then measurement precision is improved, but loss of time increases due to lengthy analysis procedures
Solution Approach 1:
The system maintains continuous flow of sample through the microfluidic channel, with metabolites constantly being separated, reacted, and detected without interruption. This continuous operation eliminates the batch processing delays inherent in conventional methods, reducing detection time while maintaining precision through consistent flow conditions and continuous monitoring
Solution Approach 2:
Sample separation and preconcentration are performed preliminarily within the microfluidic chip before detection, using flow-based separation and selective reaction zones. This preliminary action prepares the sample in advance during the flow process, enabling rapid detection with high precision without requiring lengthy post-sample preparation steps
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 high-throughput quantitative detection of amino acids, phenols, indoles, organic acids, fatty acids, sugars, and bile acids with improved sensitivity and consistency, overcoming previous detection limitations.
Implementation Method 1
amperometric detection electrode which detects the analyte
Implementation Method 2
biocatalytic element that catalyzes the conversion of a substrate to a product
Data Source
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AI summary
The present invention discloses a quantitative detection method of multiple metabolic components in a biological sample and a metabolic chip used in the method. The detection method includes performing derivatization treatment on the biological sample and then detecting the derivatized biological sample by liquid chromatography-mass spectrometry. During derivatization treatment, 3-nitrophenylhydrazine is used as a derivatization reagent, and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide is used as a derivatization reaction catalyst. According to the detection method of the present invention, high-sensitivity detection can be achieved, multiple metabolic components of different magnitudes can be detected, the operation is simple and fast, and the method is applicable to clinical detection and scientific research examination. The metabolic chip of the present invention includes a chip carrier microtiter plate and related reagents, and quantitative detection of multiple metabolic components of different magnitudes such as amino acid, phenol, phenyl or benzyl derivative, indole, organic acid, fatty acid, sugar, and bile acid in the biological sample on the same microtiter plate can be achieved.