Polar Metabolite Extraction Buffer for Chromatography Analysis
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Solution Overview
Problem
Current metabolomics analysis technologies face challenges in effectively separating and analyzing polar metabolites due to limitations in gas and liquid chromatography, including derivatization artifacts and reduced separation capacity in the presence of proteins and salts.
Innovation Solution
A method involving the use of an extraction buffer with a phase separator and volatile neutral ammonium salt for immediate cell disruption, followed by chromatographic separation and analysis of polar metabolites, which enhances extraction efficiency and reduces interference from proteins and salts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gas chromatography is used for metabolite analysis, then separation precision is improved, but derivatization is required which causes artefacts and increases process complexity
Solution Approach 1:
The patent extracts only the essential function of gas chromatography (separation precision) while removing the problematic derivatization step by using direct injection of water-soluble metabolites into the GC system, achieving separation without additional chemical preparation steps
Solution Approach 2:
The patent changes the physical-chemical parameters of the metabolites by converting them to volatile derivatives through silylation or acylation reactions that preserve the original metabolite structure while enabling direct GC analysis without complex derivatization protocols
2Device complexity
If liquid chromatography is used for metabolite analysis, then process complexity is reduced, but separation capacity is drastically reduced due to proteins and salts
Solution Approach 1:
The patent extracts and removes proteins and salts from the biological sample before liquid chromatography analysis, eliminating the interfering substances that reduce separation capacity while maintaining the simplicity of the LC approach
Solution Approach 2:
The patent introduces an intermediary purification step using solid-phase extraction or ultrafiltration membranes that selectively remove proteins and salts while preserving water-soluble metabolites, enabling effective LC analysis
3Productivity
If conventional extraction methods are used, then cell disruption is achieved, but extraction efficiency is reduced due to incomplete metabolite release
Solution Approach 1:
The patent applies preliminary action by pre-freezing cells and using rapid thawing followed by immediate vortexing and centrifugation, creating optimal conditions for complete metabolite release while preventing degradation before analysis begins
Solution Approach 2:
The patent utilizes phase transitions by freezing cells at -80°C and then rapidly thawing them, leveraging the physical state change to disrupt cell membranes and release intracellular metabolites efficiently while maintaining their integrity
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 method allows for precise separation and analysis of polar metabolites with increased sensitivity and reduced degradation, improving the detection of metabolites and their isomers, and enabling high-throughput analysis.
Implementation Method 1
extracting a biological sample with an extraction buffer comprising a phase separator and a volatile neutral ammonium salt under conditions which allow for immediate disruption of cells comprised by the biological sample
Implementation Method 2
separating the polar metabolites comprised by the extract obtained in step i) by chromatography
Data Source
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AI summary
The present invention is concerned with the analysis of polar metabolites and provides methods for analyzing polar metabolites comprising extracting a biological sample with a extraction buffer comprising a phase separator and a volatile neutral ammonium salt under conditions which allow for immediate disruption of cells comprised by the biological sample, separating the polar metabolites comprised by the extract by chromatography, and analyzing the separated polar metabolites. Moreover, a method for quenching a biological sample comprising cellular material is contemplated.