Isotopically Labeled Reagents for BMAA Detection
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Solution Overview
Problem
The limited availability of suitable analytical probes and methods hampers the study of β-N-Methylamino-L-Alanine (BMAA) incorporation into proteins, particularly in human proteins, and its mechanisms and functional consequences, due to the lack of effective detection and quantification tools.
Innovation Solution
The development of isotopically labeled reagents, including small molecules and peptides, that can be used to detect and quantify BMAA in samples using mass spectrometry, allowing for the analysis of BMAA incorporation in proteins through stable isotope labeling and isotope dilution analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional analytical methods are used to detect BMAA, then the study of BMAA incorporation into proteins is hampered, but the development of suitable analytical probes and methods is limited due to lack of effective detection tools
Solution Approach 1:
The patent applies parameter changes by introducing isotopically labeled BMAA standards (e.g., 13C and 15N labeled) to alter the mass-to-charge ratio parameter detectable by mass spectrometry. This enables differentiation between endogenous BMAA and labeled BMAA, allowing for accurate quantification through isotope dilution analysis while overcoming the previous inability to reliably detect and measure BMAA in complex protein samples
Solution Approach 2:
The isotopically labeled BMAA compounds serve as intermediary standards that mediate between the analytical instrument (mass spectrometer) and the target analyte (endogenous BMAA in protein samples). These labeled standards co-elute with endogenous BMAA but have distinct mass signatures, enabling internal calibration and accurate quantification that overcomes the previous lack of suitable analytical probes
2Measurement precision
If isotopically labeled reagents are developed for BMAA detection, then accurate detection and quantification is enabled, but the complexity of analytical methods increases
Solution Approach 1:
The isotopically labeled BMAA standards serve as self-calibrating internal references that automatically compensate for matrix effects, ionization efficiency variations, and instrument drift. By spiking samples with known amounts of labeled standards and using isotope dilution analysis, the method self-corrects for analytical variations without requiring complex external calibration curves or multiple standard preparations, thereby managing complexity while maintaining high precision
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 detection and quantification of BMAA in protein samples, facilitating a deeper understanding of its incorporation and mechanisms, and providing tools for clinical diagnosis and exposure monitoring.
Implementation Method 1
isotopically labeled reagents, including isotopically labeled small molecules and peptides, that can be used to detect and/or quantify β-N-methylamino-L-alanine (BMAA) in a sample. The reagents can be used as stable isotope labeled standards in analytical methods, including in conjunction with mass spectrometry
Implementation Method 2
The reagents can be used as stable isotope labeled standards in analytical methods, including in conjunction with mass spectrometry, to detect and/or quantify BMAA in a sample
Data Source
AI summary
Provided herein are isotopically labeled reagents, including isotopically labeled small molecules and peptides, that can be used to detect and/or quantify β-N-methylamino-L-alanine (BMAA) in a sample. The reagents can be used as stable isotope labeled standards in analytical methods, including in conjunction with mass spectrometry, to detect and/or quantify BMAA in a sample, such as a protein sample from a subject.