Spectrum and frequency of FZD4 mutations in familial exudative vitreoretinopathy

Carmel Toomes, Helen M. Bottomley, Sheila Scott, David A. Mackey, Jamie E. Craig, Binoy Appukuttan, J. Timothy Stout, Christina J. Flaxel, Kang Zhang, Graeme C.M. Black, Alan Fryer, Louise M. Downey, Chris F. Inglehearn

Research output: Contribution to journalArticlepeer-review

91 Citations (Scopus)


PURPOSE. Mutations in the frizzled-4 gene (FZD4) have recently been associated with autosomal dominant familial exudative vitreoretinopathy (FEVR) in families linking to the EVR1 locus on the long arm of chromosome 11. The purpose of this study was to screen FZD4 in a panel of 40 patients with FEVR to identify the types and location of mutations and to calculate what proportion of this heterogeneous condition is attributable to FZD4 mutations. METHODS. PCR products were generated from genomic DNA with primers designed to amplify the coding sequence of FZD4. The PCR products were screened for mutations by single-strand conformational polymorphism-heteroduplex analysis (SSCP-HA) and by direct sequencing. RESULTS. In total, eight mutations were identified, seven of which were novel. Three were deletions (c957delG, c1498delA, and c1501-1502delCT), one was a nonsense mutation (Q505X), and four were missense mutations (G36D, M105T, M157V, and S497F). CONCLUSIONS. Eight mutations have been identified in the FZD4 gene in a cohort of 40 unrelated patients with FEVR. This result indicates that FZD4 mutations are responsible for only 20% of FEVR index cases and suggests that the other FEVR loci may account for more cases than previously anticipated.

Original languageEnglish
Pages (from-to)2083-2090
Number of pages8
JournalInvestigative Ophthalmology and Visual Science
Issue number7
Publication statusPublished - Jul 2004
Externally publishedYes

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Copyright 2008 Elsevier B.V., All rights reserved.


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