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Interferon Regulatory Factor 6 (IRF6) and Fibroblast Growth Factor Receptor 1 (FGFR1) Contribute to Human Tooth Agenesis
Journal article   Open access   Peer reviewed

Interferon Regulatory Factor 6 (IRF6) and Fibroblast Growth Factor Receptor 1 (FGFR1) Contribute to Human Tooth Agenesis

Alexandre R Vieira, Adriana Modesto, Raquel Meira, Anna Renata Schneider Barbosa, Andrew C Lidral and Jeffrey C Murray
American journal of medical genetics. Part A, Vol.143(6), pp.538-545
03/15/2007
DOI: 10.1002/ajmg.a.31620
PMCID: PMC2570343
PMID: 17318851
url
https://www.ncbi.nlm.nih.gov/pmc/articles/2570343View
Open Access

Abstract

Phenotypic characteristics expressed in syndromes give clues to the factors involved in the cause of isolated forms of the same defects. We investigated two genes responsible for craniofacial syndromes, FGFR1 and IRF6 , in a collection of families with isolated tooth agenesis. Cheek swab samples were obtained for DNA analysis from 116 case/parent trios. Probands had at least one developmentally missing tooth, excluding third molars. In addition, we studied 89 cases and 50 controls from Ohio to replicate any positive findings. Genotyping was performed by kinetic polymerase chain-reaction or TaqMan assays. Linkage disequilibrium analysis and transmission distortion of the marker alleles were performed. The same variants in the IRF6 gene that are associated with isolated orofacial clefts are also associated with human tooth agenesis (rs861019, P = 0.058; rs17015215—V274I, P = 0.0006; rs7802, P = 0.004). Mutations in IRF6 cause Van der Woude and popliteal pterygium syndromes. The craniofacial phenotypic characteristics of these syndromes include oral clefts and preferential tooth agenesis of incisors and premolars, besides pits on the lower lips. Also it appears that preferential premolar agenesis is associated with FGFR1 ( P = 0.014) and IRF6 ( P = 0.002) markers. There were statistically significant data suggesting that IRF6 interacts not only with MSX1 ( P = 0.001), but also with TGFA ( P = 0.03).
muscle segment Van der Woude syndrome hypodontia cleft lip and palate oligodontia paired-box PAX9 transforming growth factor alpha orofacial clefts TGFA MSX1 Kallmann syndrome

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