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- W1584826477 abstract "Copy number variations (CNVs) are thought to act as an important genetic mechanism underlying phenotypic heterogeneity. Impaired folate metabolism can result in neural tube defects (NTDs). However, the precise nature of the relationship between low folate status and NTDs remains unclear. Using an array-comparative genomic hybridization (aCGH) assay, we investigated whether CNVs could be detected in the NTD embryonic neural tissues of methotrexate (MTX)-induced folate dysmetabolism pregnant C57BL/6 mice and confirmed the findings with quantitative real-time PCR (qPCR). The CNVs were then comprehensively investigated using bioinformatics methods to prioritize candidate genes. We measured dihydrofolate reductase (DHFR) activity and concentrations of folate and relevant metabolites in maternal serum using enzymologic method and liquid chromatography/tandem mass spectrometry (LC/MS/MS). Three high confidence CNVs on XqA1.1, XqA1.1-qA2, and XqE3 were found in the NTD embryonic neural tissues. Twelve putative genes and three microRNAs were identified as potential susceptibility candidates in MTX-induced NTDs and possible roles in NTD pathogenesis. DHFR activity and 5-methyltetrahydrofolate (5-MeTHF), 5-formyltetrahydrofolate (5-FoTHF), and S-adenosylmethionine (SAM) concentrations of maternal serum decreased significantly after MTX injection. These findings suggest that CNVs caused by defects in folate metabolism lead to NTD, and further support the hypothesis that folate dysmetabolism is a direct cause for CNVs in MTX-induced NTDs. © 2014 Wiley Periodicals, Inc. Develop Neurobiol 74: 877–893, 2014" @default.
- W1584826477 created "2016-06-24" @default.
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- W1584826477 date "2014-06-17" @default.
- W1584826477 modified "2023-09-25" @default.
- W1584826477 title "Analyses of copy number variation reveal putative susceptibility loci in MTX-induced mouse neural tube defects" @default.
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- W1584826477 doi "https://doi.org/10.1002/dneu.22170" @default.
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