DVL mutations identified from human neural tube defects and Dandy-Walker malformation obstruct the Wnt signaling pathway

查看全文 作　　者：Lingling [1,2]Liu;Weiqi [1,2]Liu;Yan [1]Shi;Ling [1]Li;Yunqian [1]Gao;Yunping [3]Lei;Richard [1,3]Finnell;Ting [4]Zhang;Feng [1,2]Zhang;Li [1,2]Jin;Huili [6]Li;Wufan [1,7]Tao;Hongyan [1,2,5]Wang

机构地区：[1]Obstetrics and Gynecology Hospital,State Key Laboratory of Genetic Engineering at School of Life Sciences,Fudan University,Shanghai,200011,China;[2]NHC Key Lab of Reproduction(Shanghai Institute of Planned Parenthood Research),Institute of Reproduction and Development,Fudan University,Shanghai,200032,China;[3]Departments of Molecular and Cellular Biology and Medicine,Baylor College of Medicine,Houston,TX,77030,USA;[4]Capital Institute of Pediatrics,Beijing,100020,China;[5]Children's Hospital and Institutes of Biomedical Sciences,Fudan University,Shanghai,200032,China;[6]Molecular,Cellular and Developmental Biology,University of Colorado Boulder,Boulder,CO 80309,USA;[7]Insititute of Developmental Biology and Molecular Medicine,Fudan University,Shanghai,200433,China

出　　处：《Journal of Genetics and Genomics》索引2020年第47卷第6期,共10页

基　　金：supported by Research and Development Program of China(2016YFC1000500)to H.W.and W.T.;the National Natural Science Foundation of China(81430005,31521003,31771669)to H.W.and(31601029)to Y.G.;the Commission for Science and Technology of Shanghai Municipality(17JC1400902)to H.W. 摘　　要：Wnt signaling pathways,including the canonical Wnt/β-catenin pathway,planar cell polarity pathway,and Wnt/Ca2+signaling pathway,play important roles in neural development during embryonic stages.The DVL genes encode the hub proteins for Wnt signaling pathways.The mutations in DVL2 and DVL3 were identified from patients with neural tube defects(NTDs),but their functions in the pathogenesis of human neural diseases remain elusive.Here,we sequenced the coding regions of three DVL genes in 176 stillborn or miscarried fetuses with NTDs or Dandy-Walker malformation(DWM)and 480 adult controls from a Han Chinese population.Four rare mutations were identified:DVL1 p.R558 H,DVL1 p.R606 C,DVL2 p.R633 W,and DVL3 p.R222 Q.To assess the effect of these mutations on NTDs and DWM,various functional analyses such as luciferase reporter assay,stress fiber formation,and in vivo teratogenic assay were performed.The results showed that the DVL2 p.R633 W mutation destabilized DVL2 protein and upregulated activities for all three Wnt signalings(Wnt/β-catenin signaling,Wnt/planar cell polarity signaling,and Wnt/Ca2+signaling)in mammalian cells.In contrast,DVL1 mutants(DVL1 p.R558 H and DVL1 p.R606 C)decreased canonical Wnt/β-catenin signaling but increased the activity of Wnt/Ca2+signaling,and DVL3 p.R222 Q only decreased the activity of Wnt/Ca2+signaling.We also found that only the DVL2 p.R633 W mutant displayed more severe teratogenicity in zebrafish embryos than wild-type DVL2.Our study demonstrates that these four rare DVL mutations,especially DVL2 p.R633 W,may contribute to human neural diseases such as NTDs and DWM by obstructing Wnt signaling pathways. 关键词：DVL genes MUTATION NTD Dandy-Walker malformation Wnt pathway

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DVL mutations identified from human neural tube defects and Dandy-Walker malformation obstruct the Wnt signaling pathway

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