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  • Title: Detecting multiple lysosomal storage diseases by tandem mass spectrometry--a national newborn screening program in Taiwan.
    Author: Liao HC, Chiang CC, Niu DM, Wang CH, Kao SM, Tsai FJ, Huang YH, Liu HC, Huang CK, Gao HJ, Yang CF, Chan MJ, Lin WD, Chen YJ.
    Journal: Clin Chim Acta; 2014 Apr 20; 431():80-6. PubMed ID: 24513544.
    Abstract:
    BACKGROUND: Interest in lysosomal storage diseases in newborn screening programs has increased in recent years. Two techniques, fluorescence (4-MU) and tandem mass spectrometry (MS/MS) methods are frequently used. We report a pilot study of large scale newborn screening for Fabry, Pompe, Gaucher, and MPS I diseases by using the MS/MS method in Taiwan and compared the performance of the MS/MS with 4-MU methods. METHODS: More than 100,000 dried blood spots (DBSs) were collected consecutively as part of the national Taiwan newborn screening programs. The enzyme activities were detected by the MS/MS method from a DBS punch. Mutation analysis was further performed for newborns with detected enzyme deficiency. RESULTS: The DNA sequence analysis for suspected cases revealed 64 newborns with confirmed Fabry mutations, 16 were classified as infantile or late-onset Pompe disease, and 1 was characterized as Gaucher disease. The positive predict value increased from 4.0% to 7.1% in the Pompe study, and from 61.0% to 95.5% in the Fabry study by the MS/MS method compared to 4-MU assay. CONCLUSIONS: The MS/MS method has been validated as a more specific, powerful and efficient tool than the 4-MU assay. It also provided a multiplex solution of newborn screening for lysosomal storage diseases.
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