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Background

Clefts of the lip and/or palate (cleft lip/palate) are notable for their complex etiology. The WNT pathway regulates multiple developmental processes including craniofacial development and may play a role in cleft lip/palate and other defects of craniofacial development such as tooth agenesis. Variations in WNT genes have been recently associated with cleft lip/palate in humans. In addition, two WNT genes, Wnt3 and Wnt9B, are located in the clf1 cleft locus in mice.

Methods

We investigated 13 SNPs located in Wnt3A, Wnt5A, Wnt8A, Wnt11, Wnt3, and Wnt9B genes for association with cleft lip/palate subphenotypes in 463 cleft cases and 303 unrelated controls. Genotyping of selected polymorphisms was carried out using Taqman assays. PLINK 1.06 software was used to test for differences in allele frequencies of each polymorphism between affected and unaffected individuals. Haplotype analysis was also performed.

Results

Individuals carrying variant alleles in WNT3 presented an increased risk for cleft lip/palate (p = 0.0003; OR, 1.61; 95% CI, 1.29-2.02) in the population studied.

Conclusion

Our results continue to support a role for WNT genes in the pathogenesis of cleft lip/palate. Although much remains to be learned about the function of individual WNT genes during craniofacial development, additional studies should focus on the identification of potentially functional variants in these genes as contributors to human clefting. Birth Defects Research (Part A), 2010. © 2010 Wiley-Liss, Inc."xsd:string
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http://purl.uniprot.org/citations/20890934http://purl.uniprot.org/core/name"Birth Defects Res A Clin Mol Teratol"xsd:string
http://purl.uniprot.org/citations/20890934http://purl.uniprot.org/core/pages"995-1000"xsd:string
http://purl.uniprot.org/citations/20890934http://purl.uniprot.org/core/title"Studies with Wnt genes and nonsyndromic cleft lip and palate."xsd:string
http://purl.uniprot.org/citations/20890934http://purl.uniprot.org/core/volume"88"xsd:string
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