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.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Kondo S,Schutte BC,Richardson RJ,Bjork BC,Knight AS,Watanabe Y,Howard E,de Lima RL,Daack-Hirsch S,Sander A,McDonald-McGinn DM,Zackai EH,Lammer EJ,Aylsworth AS,Ardinger HH,Lidral AC,Pober BR,Moreno L,Arcos-Burgos M,Vdoi
10.1038/ng985keywords:
subject
Has Abstractpub_date
2002-10-01 00:00:00pages
285-9issue
2eissn
1061-4036issn
1546-1718pii
ng985journal_volume
32pub_type
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