Title

Mutations in IRF6 cause Van der Woude and popliteal pterygium syndromes

Document Type

Article

Peer Reviewed

1

Publication Date

10-1-2002

NLM Title Abbreviation

Nat Genet

Journal/Book/Conference Title

Nature genetics

PubMed ID

12219090

DOI of Published Version

10.1038/ng985

Abstract

Interferon regulatory factor 6 (IRF6) belongs to a family of nine transcription factors that share a highly conserved helix-turn-helix DNA-binding domain and a less conserved protein-binding domain. Most IRFs regulate the expression of interferon-alpha and -beta after viral infection, but the function of IRF6 is unknown. The gene encoding IRF6 is located in the critical region for the Van der Woude syndrome (VWS; OMIM 119300) locus at chromosome 1q32-q41 (refs 2,3). The disorder is an autosomal dominant form of cleft lip and palate with lip pits, and is the most common syndromic form of cleft lip or palate. Popliteal pterygium syndrome (PPS; OMIM 119500) is a disorder with a similar orofacial phenotype that also includes skin and genital anomalies. Phenotypic overlap and linkage data suggest that these two disorders are allelic. We found a nonsense mutation in IRF6 in the affected twin of a pair of monozygotic twins who were discordant for VWS. Subsequently, we identified mutations in IRF6 in 45 additional unrelated families affected with VWS and distinct mutations in 13 families affected with PPS. Expression analyses showed high levels of Irf6 mRNA along the medial edge of the fusing palate, tooth buds, hair follicles, genitalia and skin. Our observations demonstrate that haploinsufficiency of IRF6 disrupts orofacial development and are consistent with dominant-negative mutations disturbing development of the skin and genitalia.

Keywords

Animals, Binding Sites/genetics/physiology, Blotting, Northern, Cleft Lip/genetics, Cleft Palate/genetics, DNA/metabolism, DNA-Binding Proteins/genetics, Diseases in Twins/genetics, Female, Genitalia/abnormalities, Humans, In Situ Hybridization, Interferon Regulatory Factors, Male, Mice, Mutation, Missense, Pedigree, Reverse Transcriptase Polymerase Chain Reaction, Skin Abnormalities/genetics, Structure-Activity Relationship, Syndrome, Transcription Factors/genetics, Twins, Monozygotic/genetics

Published Article/Book Citation

Nature genetics, 32:2 (2002) pp.285-289. DOI:10.1038/ng985.

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URL

https://ir.uiowa.edu/nursing_pubs/770