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- W2892080904 abstract "Congenital adrenal hyperplasia (CAH) is a group of autosomal recessive disorders that occur due to defects in the steroidogenesis pathway. Approximately 90% of CAH cases can be diagnosed by the measurement of serum 17-hydroxyprogesterone alone. However, the quantification of six additional steroids could significantly improve CAH laboratory diagnosis. Using dried blood spot (DBS) as specimen of choice can further improve patient care due to the small sample volume required for CAH diagnosis in neonates. An optimized DBS sample preparation method was employed for steroids quantification without the need of derivatization. A LC-MS/MS assay was developed and optimized using a reverse phase-ultra high-pressure liquid chromatography (RP-UHPLC) system combined with triple quadrupole mass spectrometry using positive electrospray ionization mode. The assay was validated according to CLSI analytical guidelines, including lower limit of quantification (LLOQ), linearity, precision, accuracy, carryover, and method comparison. The analytical measuring range of the method for all steroids was 2.5, 5, or 10 ng/ml to 250 ng/ml in DBS, r2 ≥ 0.995. The LLOQ, intra-day and inter-day precision were 0.11–1.8 ng/ml, 1.2–6.4 ng/ml, 1.8–11.5%, and 5.3–13.8%, respectively. Our LC-MS/MS assay simultaneously detects 7 steroids for the diagnosis of CAH and can be readily implemented in clinical laboratories to provide superior analytical performance over traditional immunoassays." @default.
- W2892080904 created "2018-09-27" @default.
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- W2892080904 date "2021-09-01" @default.
- W2892080904 modified "2023-09-25" @default.
- W2892080904 title "Measuring steroids from dried blood spots using tandem mass spectrometry to diagnose congenital adrenal hyperplasia" @default.
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- W2892080904 doi "https://doi.org/10.1016/j.cca.2021.06.005" @default.
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