13C 15N Derivatization Reagents for Metabolomics
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Solution Overview
Problem
Biological samples require proficient chemical derivative preparation for effective metabolome characterization using Gas Chromatography-Mass Spectroscopy (GC/MS), which is underutilized due to complexity and the need for specific reagents, while existing methods with deuterated reagents face issues like retention time shifts and peak shape changes.
Innovation Solution
A kit comprising 13C and 15N labeled reagents such as methylchloroformate, ethylchloroformate, methanol, ethanol, acetyl anhydride, BSTFA, MTBSTFA, trimethylsilyl-diazomethane, PITC, aniline, and O-benzylhydroxylamine for Directed Isotopic Positional Derivatization (DIPD) to facilitate metabolomics/lipidomics profiling, allowing precise chromatographic registration and identification of metabolites without retention time shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If deuterated reagents are used for metabolome characterization, then chemical derivatives can be prepared for GC/MS analysis, but retention time shifts and peak shape changes occur
Solution Approach 1:
The patent changes the isotopic parameter from deuterium (²H) to carbon-13 (¹³C) labeling in the derivatization reagents. This parameter change eliminates retention time shifts and peak shape changes while maintaining the ability to track metabolites through mass spectrometry, as ¹³C-labeled compounds have identical chromatographic behavior to their ¹²C counterparts but produce distinct mass spectral signals.
2Measurement precision
If GC/MS is used for metabolome characterization, then metabolite identification can be achieved, but complex chemical derivative preparation is required
Solution Approach 1:
The patent develops universal derivatization reagents with multiple functional groups that can react with various metabolite classes (amino acids, organic acids, sugars, lipids) in a single derivatization step. The ¹³C-labeled reagents provide both derivatization functionality and isotopic labeling, eliminating the need for multiple specialized reagents and simplifying the overall workflow while maintaining comprehensive metabolite coverage.
3Reliability
If 13C and 15N derivatization reagents are used, then precise chromatographic registration is achieved, but reagent cost increases
Solution Approach 1:
The patent employs a mixed-labeling strategy where only critical internal standards and key metabolites are derivatized with expensive ¹³C/¹⁵N-labeled reagents, while other metabolites use unlabeled reagents. This partial application of isotopic labeling achieves sufficient precision for quantitative metabolomics without the prohibitive cost of complete ¹³C/¹⁵N labeling of all reagents, balancing accuracy requirements with budget constraints.
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 accurate and efficient metabolomic/lipidomic profiling by providing stable isotope labeling that maintains precise chromatographic registration, enhancing the identification and quantitation of metabolites with improved signal-to-noise ratios and compatibility with both GC/MS and LC/MS applications.
Implementation Method 1
Directed Isotopic Positional Derivatization (DIPD) approach that utilizes 13C and/or 15N derivatization reagents
Implementation Method 2
stable isotope labeling that maintains precise chromatographic registration
Implementation Method 3
Gas Chromatography-Mass Spectroscopy (GC/MS) and liquid chromatography/mass spectrometry (LC/MS)
Implementation Method 4
Gas Chromatography-Mass Spectroscopy (GC/MS) and liquid chromatography/mass spectrometry (LC/MS)
Data Source
AI summary
Disclosed are 13C and 15N derivatization reagents and their use for gas chromatography-mass spectroscopy and liquid chromatography/mass spectroscopy chemical identification and quantification.