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- W2088844687 abstract "We report the results of molecular neonatal screening for homocystinuria (cystathionine beta-synthase deficiency) in neonates of Qatari origin, developed in conjunction with a novel biochemical screening approach. DNA was extracted from dried blood spots (DBS); the prevalent Qatari CBS gene mutation p.R336C (c.1006C>T) and a second mutation were tested with specific TaqMan assays. Over a period of 2 years we screened 12,603 neonates and identified six affected neonates homozygous for p.R336C. There were 225 heterozygous carriers for p.R336C. One additional child with homocystinuria detected through biochemical screening was homozygous for a mutation not previously identified in Qatar. Homocystinuria in the Qatari population has an incidence of 1:1,800, the highest in the world and even higher than previously estimated. Allele frequency of the mutation p.R336C is approximately 1%, displaying a significant deviation from Hardy Weinberg equilibrium. In conclusion, first-line molecular neonatal screening is technically feasible and may be developed as an option for presymptomatic identification of genetic disorders caused by specific mutations or a limited number of prevalent mutations. However, sensitivity for the diagnosis of disorders caused by various mutations is limited even in a homogeneous population such as Qatar. Hum Mutat 30:1–2, 2009. © 2009 Wiley-Liss, Inc." @default.
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- W2088844687 date "2009-06-01" @default.
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- W2088844687 title "Molecular neonatal screening for homocystinuria in the Qatari population" @default.
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- W2088844687 doi "https://doi.org/10.1002/humu.20994" @default.
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