Expanded newborn screening for inherited metabolic disorders and genetic characteristics in a southern Chinese population

2019 ◽  
Vol 494 ◽  
pp. 106-111 ◽  
Author(s):  
Yiming Lin ◽  
Quanzhi Zheng ◽  
Tianwen Zheng ◽  
Zhenzhu Zheng ◽  
Weihua Lin ◽  
...  
Keyword(s):  
Newborn Screening ◽  
Chinese Population ◽  
Metabolic Disorders ◽  
Genetic Characteristics ◽  
Southern Chinese ◽  
Inherited Metabolic Disorders ◽  
Expanded Newborn Screening

scholarly journals Spectrum Analysis of Inherited Metabolic Disorders for Expanded Newborn Screening in a Central Chinese Population

2022 ◽  
Vol 12 ◽  
Author(s):  
Xia Li ◽  
Jun He ◽  
Ling He ◽  
Yudong Zeng ◽  
Xuzhen Huang ◽  
...  
Keyword(s):  
Newborn Screening ◽  
Incidence Rate ◽  
Intellectual Development ◽  
Metabolic Disorders ◽  
Carnitine Deficiency ◽  
Acid Oxidation ◽  
Abnormal Growth ◽  
Inherited Metabolic Disorders ◽  
Expanded Newborn Screening ◽  
Confirmatory Tests

Neonatal inherited metabolic disorders (IMDs) are closely associated with early neonatal death and abnormal growth and development. Increasing attention has been paid to IMDs because of their high incidence and diversity. However, there are no reports about the incidence of IMDs in Changsha, China. Therefore, we retrospectively analyzed the screening results of neonates to evaluate the characteristics of IMDs in the area. From January 2016 to December 2020, 300,849 neonates were enrolled for expanded newborn screening by tandem mass spectrometry in the Neonatal Disease Screening Center of the Changsha Hospital for Maternal & Child Health Care. Newborns with mild initial results were recalled for repeated tests; if the second test was still positive, the patient was referred for confirmatory tests. A total of 71 confirmed cases were identified in our study, with an incidence rate of 1:4,237. There were 28 cases of amino acid metabolic disorders, representing 39.44% of the IMDs diagnosed, with an incidence rate of 1:10,745. Twelve newborns were diagnosed with organic acid metabolic disorders, accounting for 16.66% of IMDs, with an incidence rate of 1:25,071. There were 31 cases of fatty acid oxidation disorders, representing 43.05% of IMDs, with an incidence rate of 1:9,705. Overall, 14 types of IMDs were found in Changsha. The most common disorders in the region were primary carnitine deficiency, hyperphenylalaninemia and short-chain acyl-CoA dehydrogenase deficiency. Their incidence rate is respectively 1:13,675, 1:16,714 and 1:42,978. The mutations in PAH, SLC22A5, and ACADS are the leading causes of IMDs in this area. This study demonstrates the importance of utilizing MS/MS in IMD screening for early diagnosis and treatment. This strategy may be used for prenatal genetic counseling to avoid irreversible growth and intellectual development disorders in children.

scholarly journals First Results From Expanded Newborn Screening in slovak Republic

2014 ◽  
Vol 61 (1) ◽  
Author(s):  
S. Dluholucký ◽  
M. Knapková ◽  
M. Záhorcová
Keyword(s):  
Newborn Screening ◽  
Metabolic Disorders ◽  
Slovak Republic ◽  
Blood Samples ◽  
Inherited Metabolic Disorders ◽  
Expanded Newborn Screening ◽  
First Results ◽  
The One ◽  
Cpt I ◽  
Suspected Diagnosis

AbstractA one-and-a-half year experience with expanded newborn screening (ENBS) in Slovakia provided by means of tandem mass spectrometry (LC-MS/MS) is presented.Method ENBS was realised from dry blood samples of the regular NBS in National Screening Centre SK. The LC-MS/MS software used allowed evaluating even 73 analytes in MRM mode after cut-of limits in 99 percentile of daily values. The regular ENBS was oriented to 10 inherited metabolic disorders (IMDs), organic acids and carnitine defects (PKU/HPA, MSUD, GAI, IVA, MCAD, LCHAD, SCAD, CPT I, CPT II, CACT). Except these, many other variations of results were registered in perimeter of the method. They were individually evaluated until the confrmation or exclusion of the suspected diagnosis.Results During the one-and-a-half years, 82 892 newborns were evaluated by ENBS and 34 positive cases of IMDs were detected and confrmed, which represents a screening prevalence of 1:2438 newborns. Out of these, 24 cases were from regular ENBS (PKU/HPA, MSUD, MCAD) with an incidence of 1:3 454, and 10 additional cases at the periphery of LC-MS/MS evaluation with a prevalence of 1:8 286.Conclusion Preliminary experience and results with ENBS confrmed its high efectiveness not only in 10 IMDs included in regular ENBS, but also at perimeter of LC-MS/MS method, in which it is possible to detect additional IMDs not included in regular spectrum of ENBS. This group comprised 29% of all cases. In general, the prevalence is comparable with PKU and/or CAH.

scholarly journals Spectrum analysis of inborn errors of metabolism for expanded newborn screening in a northwestern Chinese population

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ruixue Zhang ◽  
Rong Qiang ◽  
Chengrong Song ◽  
Xiaoping Ma ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Newborn Screening ◽  
Inborn Errors Of Metabolism ◽  
Northwest China ◽  
Methylmalonic Acidemia ◽  
Shaanxi Province ◽  
Inborn Errors ◽  
Organic Acidurias ◽  
Genetic Characteristics ◽  
Disease Spectrum ◽  
Expanded Newborn Screening

AbstractExpanded newborn screening facilitates early identification and intervention of patients with inborn errors of metabolism (IEMs), There is a lack of disease spectrum data for many areas in China. To determine the disease spectrum and genetic characteristics of IEMs in Xi'an city of Shaanxi province in northwest China, 146152 newborns were screening by MSMS from January 2014 to December 2019 and 61 patients were referred to genetic analysis by next generation sequencing (NGS) and validated by Sanger sequencing. Seventy-five newborns and two mothers were diagnosed with IEMs, with an overall incidence of 1:1898 (1:1949 without mothers). There were 35 newborns with amino acidemias (45.45%, 1:4176), 28 newborns with organic acidurias (36.36%, 1:5220), and 12 newborns and two mothers with FAO disorders (18.18%; 1:10439 or 1:12179 without mothers). Phenylketonuria and methylmalonic acidemia were the two most common disorders, accounting for 65.33% (49/75) of all confirmed newborn. Some hotspot mutations were observed for several IEMs, including PAH gene c.728G>A for phenylketonuria; MMACHC gene c.609G>A and c.567dupT, MMUT gene c.323G>A for methylmalonic acidemia and SLC25A13 gene c.852_855del for citrin deficiency. Our study provides effective clinical guidance for the popularization and application of expanded newborn screening, genetic screening, and genetic counseling of IEMs in this region.

scholarly journals Biochemical And Genetic Characteristics of Patients With Primary Carnitine Deficiency Identified Through Newborn Screening

2021 ◽  
Author(s):  
Yiming Lin ◽  
Bangbang Lin ◽  
Yanru Chen ◽  
Zhenzhu Zheng ◽  
Qingliu Fu ◽  
...  
Keyword(s):  
Newborn Screening ◽  
Allele Frequency ◽  
Large Scale ◽  
Autosomal Recessive Disorder ◽  
Carnitine Deficiency ◽  
Acid Oxidation ◽  
Genetic Characteristics ◽  
Pathogenic Variants ◽  
Southern Chinese ◽  
Primary Carnitine Deficiency

Abstract Background: Primary carnitine deficiency (PCD) is an autosomal recessive disorder of the carnitine transportation that leads to impaired fatty acid oxidation. Large-scale studies on newborn screening (NBS) for PCD are limited. This study aimed to investigate the biochemical and genetic characteristics of patients with PCD detected by NBS.Results: A total of 548,247 newborns were screened for PCD between January 2014 and June 2021, 1714 newborns had low free carnitine (C0) levels were called back and forty-nine patients were diagnosed with PCD. The latest incidence rate in Quanzhou, China was estimated to be 1 in 11,189 newborns. NBS results showed that all patients had varying degrees of decreased C0 levels, while seven patients exhibited normal C0 levels during recall review. All patients harbored biallelic pathogenic variants in the SLC22A5 gene. Nineteen distinct SLC22A5 variants were detected in the 49 patients, most of the detected variants were clustered in exons 1, 4, and 7. The top eight variants together had an allele frequency of 86.73%. The most common variant was c.760C>T (p.R254*) with an allele frequency of 31.63%, followed by c.51C>G (p.F17L) (17.35%) and c.1400C>G (p.S467C) (16.33%). The C0 level of patients with N/N genotype was significantly lower than that of M/M group. The C0 level of patients with genotypes of R254*/R254* and R254*/F17L were far lower than patients with genotype of R254*/S467C.Conclusions: This study presented more than 500,000 NBS data with the latest incidence of 1:11,189 in Quanzhou area. The SLC22A5 variant spectrum in the selected southern Chinese population was updated. Patients with null variants were associated with low C0 levels. It is necessary to combine genetic testing to improve screening efficiency due to PCD patients may have normal C0 levels during NBS and recall review.

scholarly journals OPTIMIZATION OF THE DIAGNOSTICS OF INHERITED METABOLIC DISORDERS WITH A POSITIVE RESULT OF EXTENDED NEWBORN SCREENING

2020 ◽  
Vol 10 (2(36)) ◽  
pp. 19-28
Author(s):  
T. K. Znamenska ◽  
O. V. Vorobiova ◽  
I. E. Kuzneczov ◽  
I. V. Lastivka ◽  
I. H. Samoylenko ◽  
...  
Keyword(s):  
Positive Result ◽  
Newborn Screening ◽  
Metabolic Disorders ◽  
Inherited Metabolic Disorders

scholarly journals Including Classical Galactosaemia in the Expanded Newborn Screening Panel Using Tandem Mass Spectrometry for Galactose-1-Phosphate

2019 ◽  
Vol 5 (2) ◽  
pp. 19 ◽  
Author(s):  
Arieh Cohen ◽  
Marta Baurek ◽  
Allan Lund ◽  
Morten Dunø ◽  
David Hougaard
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Newborn Screening ◽  
Metabolic Disorders ◽  
Tandem Mass ◽  
Screening Programs ◽  
Screening Performance ◽  
Expanded Newborn Screening ◽  
Classical Galactosaemia

Galactosaemia has been included in various newborn screening programs since 1963. Several methods are used for screening; however, the predominant methods used today are based on the determination of either galactose-1-phosphate uridyltransferase (GALT) activity or the concentration of total galactose. These methods cannot be multiplexed and therefore require one full punch per sample. Since the introduction of mass spectrometry in newborn screening, many diseases have been included in newborn screening programs. Here, we present a method for including classical galactosaemia in an expanded newborn screening panel based on the specific determination of galactose-1-phosphate by tandem mass spectrometry. The existing workflow only needs minor adjustments, and it can be run on the tandem mass spectrometers in routine use. Furthermore, compared to the currently used methods, this novel method has a superior screening performance, producing significantly fewer false positive results. We present data from 5500 routine newborn screening samples from the Danish Neonatal Screening Biobank. The cohort was enriched by including 14 confirmed galactosaemia positive samples and 10 samples positive for other metabolic disorders diagnosed through the Danish newborn screening program. All galactosaemia positive samples were identified by the method with no false positives. Furthermore, the screening performance for other metabolic disorders was unaffected.

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