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Publication : FOXI3 pathogenic variants cause one form of craniofacial microsomia.

First Author	Mao K	Year	2023
Journal	Nat Commun	Volume	14
Issue	1	Pages	2026
PubMed ID	37041148	Mgi Jnum	J:336768
Mgi Id	MGI:7463349	Doi	10.1038/s41467-023-37703-6
Citation	Mao K, et al. (2023) FOXI3 pathogenic variants cause one form of craniofacial microsomia. Nat Commun 14(1):2026

abstractText

Craniofacial microsomia (CFM; also known as Goldenhar syndrome), is a craniofacial developmental disorder of variable expressivity and severity with a recognizable set of abnormalities. These birth defects are associated with structures derived from the first and second pharyngeal arches, can occur unilaterally and include ear dysplasia, microtia, preauricular tags and pits, facial asymmetry and other malformations. The inheritance pattern is controversial, and the molecular etiology of this syndrome is largely unknown. A total of 670 patients belonging to unrelated pedigrees with European and Chinese ancestry with CFM, are investigated. We identify 18 likely pathogenic variants in 21 probands (3.1%) in FOXI3. Biochemical experiments on transcriptional activity and subcellular localization of the likely pathogenic FOXI3 variants, and knock-in mouse studies strongly support the involvement of FOXI3 in CFM. Our findings indicate autosomal dominant inheritance with reduced penetrance, and/or autosomal recessive inheritance. The phenotypic expression of the FOXI3 variants is variable. The penetrance of the likely pathogenic variants in the seemingly dominant form is reduced, since a considerable number of such variants in affected individuals were inherited from non-affected parents. Here we provide suggestive evidence that common variation in the FOXI3 allele in trans with the pathogenic variant could modify the phenotypic severity and accounts for the incomplete penetrance.

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Publication : FOXI3 pathogenic variants cause one form of craniofacial microsomia.

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