Tandem Mass Spectrometry Assay for Simultaneous CAH Steroid Profiling
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Solution Overview
Problem
Current methods for detecting congenital adrenal hyperplasia (CAH) analytes, such as 21-hydroxylase deficiency, rely on incomplete or inefficient techniques that do not accurately measure multiple steroid hormones simultaneously, limiting effective diagnosis and monitoring.
Innovation Solution
The use of tandem mass spectrometry to detect and quantify multiple CAH panel analytes, including pregnenolone, 17-OH pregnenolone, progesterone, androstenedione, testosterone, and others, in a single sample injection, through ionization and fragmentation analysis, enabling precise determination of hormone levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection methods are used for CAH analytes, then the detection process is simpler, but the measurement accuracy and ability to detect multiple steroid hormones simultaneously is insufficient
Solution Approach 1:
The patent combines multiple steroid hormone detections into a single mass spectrometry platform, enabling simultaneous measurement of multiple CAH analytes (17-OH progesterone, progesterone, testosterone, androstenedione, DHEA, cortisol, 11-deoxycortisol) in one assay, thereby improving measurement precision while managing system complexity through integration
Solution Approach 2:
The mass spectrometry system is designed to perform multiple functions by detecting various steroid hormones through a universal detection platform, allowing the same instrument to measure different analytes using standardized mass spectrometric techniques with appropriate ionization and detection parameters
2Productivity
If multiple steroid hormones are detected simultaneously, then the diagnostic efficiency is improved, but the device complexity and analytical requirements increase
Solution Approach 1:
The patent integrates multiple hormone detection capabilities into a single mass spectrometry run, allowing simultaneous quantification of multiple CAH-related steroid hormones in one sample injection, which significantly improves diagnostic efficiency by reducing the number of separate assays needed
Solution Approach 2:
The patent employs parameter optimization in mass spectrometry detection, including adjusting ionization voltage, collision energy, and mass-to-charge ratio settings to enable simultaneous detection of multiple analytes with different molecular weights and properties, thereby managing system complexity through controlled parameter variations
3Measurement precision
If tandem mass spectrometry is used for accurate measurement, then the measurement precision is improved, but the operational complexity and technical requirements increase
Solution Approach 1:
The patent implements preliminary sample preparation steps including protein precipitation and extraction before mass spectrometry analysis, which simplifies the operational complexity by pre-processing samples to remove interfering substances, making the subsequent mass spectrometry measurement more straightforward and reliable
Solution Approach 2:
The patent uses internal standards as intermediaries in the mass spectrometry analysis, which facilitate accurate quantification by compensating for variations in ionization efficiency and instrument response, thereby improving measurement precision while providing a reference framework that simplifies data interpretation
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 approach allows for accurate and simultaneous measurement of multiple CAH analytes, enhancing diagnostic capabilities and monitoring of CAH conditions by providing reliable hormone level data.
Implementation Method 1
subjecting a sample to an ionization source under conditions suitable to produce one or more ions detectable by mass spectrometry
Implementation Method 2
determining the amounts of one or more ions from each of the one or more analytes by tandem mass spectrometry
Data Source
AI summary
Methods are provided for detecting the amount of one or more CAH panel analytes (i.e., pregnenolone, 17-OH pregnenolone, progesterone, 17-OH progesterone, dehydroepiandrosterone (DHEA), androstenedione, testosterone, deoxycorticosterone, 11-deoxycortisol, and cortisol) in a sample by mass spectrometry. The methods generally involve ionizing one or more CAH panel analytes in a sample and quantifying the generated ions to determine the amount of one or more CAH panel analytes in the sample. In methods where amounts of multiple CAH panel analytes are detected, the amounts of multiple analytes are detected in the same sample injection.