Hsiang-Yu Lin , Chung-Lin Lee , Ya-Hui Chang , Yuan-Rong Tu , Yun-Ting Lo , Jun-Yi Wu , Dau-Ming Niu , Mei-Ying Liu , Hsin-Yun Liu , Hsiao-Jan Chen , Shu-Min Kao , Li-Yun Wang , Huey-Jane Ho , Chih-Kuang Chuang , Shuan-Pei Lin
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引用次数: 0
Abstract
Purpose
Mucopolysaccharidosis IVA (MPS IVA) is a rare lysosomal storage disorder arising from a deficiency in N-acetylgalactosamine-6-sulfatase.
Methods
From September 2019 to October 2023, a total of 264,843 Taiwanese newborns underwent screening for MPS IVA using dried blood spots and tandem mass spectrometry.
Results
Among the 95 referred infants, 9 (9%) were confirmed to have MPS IVA (group 1), 18 (19%) were highly suspected to have MPS IVA (group 2), 61 (64%) were identified as heterozygotes of MPS IVA (group 3), and 7 (7%) were determined not to have MPS IVA (group 4). A total of 34 different GALNS (HGNC:4122) gene variants were identified through our MPS IVA newborn screening program. The most prevalent variant was c.857C>T p.(Thr286Met), found in 33 cases (29%), followed by c.953T>G p.(Met318Arg) in 22 cases (19%). Intravenous enzyme replacement therapy was initiated in 5 patients at ages ranging from 0.3 to 1.7 years. The estimated incidence of MPS IVA in this screening program was 3.4 per 100,000 live births.
Conclusion
Because of the progressive nature of MPS IVA, an early diagnosis facilitated by newborn screening and prompt initiation of enzyme replacement therapy before irreversible organ damage occurs may result in improved clinical outcomes.
期刊介绍:
Genetics in Medicine (GIM) is the official journal of the American College of Medical Genetics and Genomics. The journal''s mission is to enhance the knowledge, understanding, and practice of medical genetics and genomics through publications in clinical and laboratory genetics and genomics, including ethical, legal, and social issues as well as public health.
GIM encourages research that combats racism, includes diverse populations and is written by authors from diverse and underrepresented backgrounds.