Document Type

Article

Peer Reviewed

1

Publication Date

12-15-2009

Journal, Book or Conference Title

Human molecular genetics

NLM Title Abbreviation

Hum Mol Genet

PubMed ID

19779022

DOI

10.1093/hmg/ddp444

Abstract

Nonsyndromic orofacial clefts are a common complex birth defect caused by genetic and environmental factors and/or their interactions. A previous genome-wide linkage scan discovered a novel locus for cleft lip with or without cleft palate (CL/P) at 9q22-q33. To identify the etiologic gene, we undertook an iterative and complementary fine mapping strategy using family-based CL/P samples from Colombia, USA and the Philippines. Candidate genes within 9q22-q33 were sequenced, revealing 32 new variants. Concurrently, 397 SNPs spanning the 9q22-q33 2-LOD-unit interval were tested for association. Significant SNP and haplotype association signals (P = 1.45E - 08) narrowed the interval to a 200 kb region containing: FOXE1, C9ORF156 and HEMGN. Association results were replicated in CL/P families of European descent and when all populations were combined the two most associated SNPs, rs3758249 (P = 5.01E - 13) and rs4460498 (P = 6.51E - 12), were located inside a 70 kb high linkage disequilibrium block containing FOXE1. Association signals for Caucasians and Asians clustered 5' and 3' of FOXE1, respectively. Isolated cleft palate (CP) was also associated, indicating that FOXE1 plays a role in two phenotypes thought to be genetically distinct. Foxe1 expression was found in the epithelium undergoing fusion between the medial nasal and maxillary processes. Mutation screens of FOXE1 identified two family-specific missense mutations at highly conserved amino acids. These data indicate that FOXE1 is a major gene for CL/P and provides new insights for improved counseling and genetic interaction studies.

Keywords

Chromosome Mapping, Chromosomes, Human, Pair 9/genetics, Cleft Lip/genetics, Cleft Palate/genetics, Forkhead Transcription Factors/genetics, Haplotypes, Humans, Lod Score

Published Article/Book Citation

The definitive version was published in Human molecular genetics, 18:24 (2009) pp.4879-4896. DOI:10.1093/hmg/ddp444.

Rights

Author Posting. Copyright © IRL Press, 2009. This article is posted here by permission of the publisher for personal use, not for redistribution.

 

URL

http://ir.uiowa.edu/nursing_pubs/757