Article (Scientific journals)
Evaluation of Neonatal Screening Programs for Tyrosinemia Type 1 Worldwide
Kuypers, Allysa M.; Bouva, Marelle J.; Loeber, J. Gerard et al.
2024In International Journal of Neonatal Screening, 10 (4), p. 82
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Abstract :
[en] In The Netherlands, newborn screening (NBS) for tyrosinemia type 1 (TT1) uses dried blood spot (DBS) succinylacetone (SUAC) as a biomarker. However, high false-positive (FP) rates and a false-negative (FN) case show that the Dutch TT1 NBS protocol is suboptimal. In search of optimization options, we evaluated the protocols used by other NBS programs and their performance. We distributed an online survey to NBS program representatives worldwide (N = 41). Questions focused on the organization and performance of the programs and on changes since implementation. Thirty-three representatives completed the survey. TT1 incidence ranged from 1/13,636 to 1/750,000. Most NBS samples are taken between 36 and 72 h after birth. Most used biomarkers were DBS SUAC (78.9%), DBS Tyrosine (Tyr; 5.3%), or DBS Tyr with second tier SUAC (15.8%). The pooled median cut-off for SUAC was 1.50 µmol/L (range 0.3–7.0 µmol/L). The median cut-off from programs using laboratory-developed tests was significantly higher (2.63 µmol/L) than the medians from programs using commercial kits (range 1.0–1.7 µmol/L). The pooled median cut-off for Tyr was 216 µmol/L (range 120–600 µmol/L). Overall positive predictive values were 27.3% for SUAC, 1.2% for Tyr solely, and 90.1% for Tyr + SUAC. One FN result was reported for TT1 NBS using SUAC, while three FN results were reported for TT1 NBS using Tyr. The NBS programs for TT1 vary worldwide in terms of analytical methods, biochemical markers, and cut-off values. There is room for improvement through method standardization, cut-off adaptation, and integration of new biomarkers. Further enhancement is likely to be achieved by the application of post-analytical tools.
Disciplines :
Pediatrics
Author, co-author :
Kuypers, Allysa M. ;  Section of Metabolic Diseases, Beatrix Children’s Hospital, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
Bouva, Marelle J. ;  Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands
Loeber, J. Gerard;  International Society for Neonatal Screening (ISNS) Office, 3721 CK Bilthoven, The Netherlands
Boelen, Anita ;  Endocrine Laboratory, Department of Clinical Chemistry, Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
Dekkers, Eugenie;  Centre for Population Research, National Institute for Public Health and the Environment (RIVM), 3720 BA Bilthoven, The Netherlands
Petritis, Konstantinos ;  Newborn Screening and Molecular Biology Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
Pickens, C. Austin ;  Newborn Screening and Molecular Biology Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
Boemer, François  ;  Centre Hospitalier Universitaire de Liège - CHU > > Service de génétique
van Spronsen, Francjan J. ;  Section of Metabolic Diseases, Beatrix Children’s Hospital, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
Heiner-Fokkema, M. Rebecca ;  Laboratory of Metabolic Diseases, Department of Laboratory Medicine, University Medical Center Groningen, University of Groningen, P.O. Box 30 001, 9700 RB Groningen, The Netherlands
Language :
English
Title :
Evaluation of Neonatal Screening Programs for Tyrosinemia Type 1 Worldwide
Publication date :
16 December 2024
Journal title :
International Journal of Neonatal Screening
eISSN :
2409-515X
Publisher :
MDPI
Volume :
10
Issue :
4
Pages :
82
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 27 December 2024

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