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Merello, Elisa; Kibar, Zoha; Allache, Redouane; Piatelli, Gianluca; Cama, Armando; Capra, Valeria; De Marco, Patrizia
Birth defects research. A Clinical and molecular teratology, July 2013, Letnik: 97, Številka: 7Journal Article
BACKGROUND Neural tube defects (NTDs) are severe malformations that arise when the neural tube fails to close during embryogenesis. The planar cell polarity pathway is involved in neural tube closure and has been implicated in the pathogenesis of NTDs both in animal models and human cohorts. Dishevelled (Dvl/Dsh) is a multi‐module protein and a key regulator of both the canonical Wnt and the PCP pathway. In mouse, all Dvl1−/−; Dvl2−/− double mutants display craniorachischisis, a severe form of open NTDs. Recently, we have reported a possible role for rare variants of DVL2 as risk factors for NTDs. METHODS In view of these data, we hypothesized that DVL1 mutations might increase the risk for NTDs in some cases. Resequencing of the DVL1 gene in a cohort of 473 NTDs patients and 150 ethnically matched controls was performed. Prediction of the downstream effects of the nonsynonymous variants was done using computational methods. RESULTS We identified six missense variants that were absent in our ethnically matched controls group, and four of them (p.Arg153Cys; p.Glu544Arg; p.Arg568Trp; p.Val644Phe) were predicted to have a functional effect on protein structure by one or more bioinformatic programs. However, there was no difference in the overall rate of deleterious variants between the patients and controls (four in patients and three in controls; p = 0.36). CONCLUSION Our findings did not provide evidence for the implication of DVL1 in the pathogenesis of human NTDs. Birth Defects Research (Part A) 97:452–455, 2013. © 2013 Wiley Periodicals, Inc.
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