Abstract
PurposeTo develop a multiplexed assay for the newborn screening of lysosomal storage disorders and additional inborn errors in a flexible, comprehensive, and affordable manner to keep up with the expansion of the newborn screening panel. MethodsUltraperformance liquid chromatography–tandem mass spectrometry (UPLC-MS/MS) was chosen as the detection platform for its superiority compared to traditional flow-injection MS/MS. ResultsA high-throughput, 18-plex UPLC-MS/MS assay was developed for screening purposes with a sample turnaround time of 2.7minutes. The assay was consolidated such that only four dried blood spot punches were required, and it displayed good precision and reproducibility. ConclusionWe report a highly multiplexed UPLC-MS/MS assay that is appropriate for the newborn screening of 15 lysosomal storage diseases and 3 additional inborn errors. It can be further expanded to include additional conditions for which presymptomatic diagnosis may facilitate optimum treatment outcome.
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