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- W2036040400 abstract "Increased plasma total homocysteine (tHcy), a risk factor for cardiovascular disease, is related to genetic, environmental, and nutritional factors, in particular folate status. Future large epidemiologic studies of the genetic basis of hyperhomocysteinemia will require high-throughput assays for polymorphisms of genes related to folate and Hcy metabolism.We developed a high-level multiplex genotyping method based on matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for the detection of 12 polymorphisms in 8 genes involved in folate or Hcy metabolism. The assay includes methylenetetrahydrofolate reductase (MTHFR) 677C>T and 1298A>C, methionine synthase (MTR) 2756A>G, methionine synthase reductase (MTRR) 66A>G, cystathionine beta-synthase (CBS) 844ins68 and 699C>T, transcobalamin II (TCII) 776C>G and 67A>G, reduced folate carrier-1 (RFC1) 80G>A, paraoxonase-1 (PON1) 575A>G and 163T>A, and betaine homocysteine methyltransferase (BHMT) 742G>A.The failure rate of the assay was < or = 1.7% and was attributable to unsuccessful DNA purification, nanoliter dispensing, and spectrum calibration. Most errors were related to identification of heterozygotes as homozygotes. The mean error rate was 0.26%, and error rates differed for the various single-nucleotide polymorphisms. Identification of CBS 844ins68 was carried out by a semiquantitative approach. The throughput of the MALDI-TOF MS assay was 1152 genotypes within 20 min.This high-level multiplex method is able to genotype 12 polymorphisms involved in folate or Hcy metabolism. The method is rapid and reproducible and could facilitate large-scale studies of the genetic basis of hyperhomocysteinemia and associated pathologies." @default.
- W2036040400 created "2016-06-24" @default.
- W2036040400 creator A5026276538 @default.
- W2036040400 creator A5039611683 @default.
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- W2036040400 date "2004-02-01" @default.
- W2036040400 modified "2023-10-10" @default.
- W2036040400 title "High-Level Multiplex Genotyping of Polymorphisms Involved in Folate or Homocysteine Metabolism by Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry" @default.
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- W2036040400 doi "https://doi.org/10.1373/clinchem.2003.026799" @default.
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