ORIGINAL RESEARCH article
Front. Genet.
Sec. Genetics of Common and Rare Diseases
Volume 16 - 2025 | doi: 10.3389/fgene.2025.1617418
This article is part of the Research TopicInsights in Genetics of Common and Rare Diseases 2024View all 23 articles
Expanded Newborn Screening for Inborn Errors of Metabolism and Genetic Variants in Xinjiang, China
Provisionally accepted
- 1新疆医科大学, 新疆维吾尔自治区, China
- 2乌鲁木齐市妇幼保健院产前诊断中心, 新疆维吾尔自治区, China
- 3乌鲁木齐市妇幼保健院科研科, 新疆维吾尔自治区, China
- 4新疆围产期疾病临床医学研究中心，乌鲁木齐市妇幼保健院产科, 新疆维吾尔自治区, China
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Inborn errors of metabolism (IEMs), with diverse clinical phenotypes, are featured primarily by complex etiology, lack of specificity in clinical manifestations, major damage to the nervous and digestive system, and even death, bringing great pain and economic burden to children and families. Expanded newborn screening for IEMs by tandem mass spectrometry (MS/MS) is effective to realize early diagnosis and presymptomatic treatment, which may be useful for preventing severe permanent sequelae and death. This study was scheduled to determine the disease spectrum, prevalence and gene variants of IEMs in Xinjiang, China. A sum of 107,741 newborns were screened by MS/MS from January 2019 to December 2024. After initial screening, 3947 newborns, who had positive results, needed to be recalled.The number of successful recalls was 3817 and the racall rate was 96.71%. Suspected positive patients were further diagnosed through next-generation sequencing (NGS) and validated by sanger sequencing. Seventy-three patients were diagnosed with IEMs in Xinjiang, resulting in an overall incidence of 1/1,476. The incidence of amino acid, organic acid, and fatty acid metabolic disorders were 1/1995, 1/8978 and 1/15392, respectively. Hyperphenylalaninemia, Hypermethioninemia and Methylmalonic acidemia ranked the top 3 of all detected IEMs. One hundred twenty-seven mutations in eleven IEMs-associated genes were identified in 69 confirmed cases.Several hotspot mutations in the PAH gene were identified. This study observed some unreported mutation sites in MAT1A gene，which enriched the gene database. Therefore, our data clearly elucidated the disease spectrum and genetic variants in Xinjiang, contributing to the treatment and prenatal genetic counseling of these disorders in this region.
Keywords: Inborn errors of metabolism, Newborn screening, Tandem Mass Spectrometry, Next-generation sequencing, genetic variants
Received: 24 Apr 2025; Accepted: 25 Jun 2025.
Copyright: © 2025 张, 田, 代, 张, 郭 and 丁. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: 桂凤 丁, 新疆围产期疾病临床医学研究中心，乌鲁木齐市妇幼保健院产科, 新疆维吾尔自治区, China
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