Patat O, van Ravenswaaij-Arts CMA, Tantau J, Corsten-Janssen N, van Tintelen JP, Dijkhuizen T, Kaplan J, Chassaing N.
Otocephaly-Dysgnathia Complex: Description of Four Cases and Confirmation of the Role of OTX2.
Mol Syndromol 2013;
4:302-5. [PMID:
24167467 DOI:
10.1159/000353727]
[Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/22/2013] [Indexed: 11/19/2022] Open
Abstract
Otocephaly-dysgnathia complex is characterized by mandibular hypo- or aplasia, ear abnormalities, microstomia, and microglossia. Mutations in the orthodenticle homeobox 2 (OTX2) and paired related homeobox 1 (PRRX1) genes have recently been identified in some cases. We screened 4 otocephalic cases for these 2 genes and identified OTX2 mutations in 2 of them, thus confirming OTX2 is implicated in otocephaly. No PRRX1 mutation was identified. Interestingly, ocular involvement is not a constant feature in otocephalic cases with an OTX2 mutation. In one case, the mutation was inherited from a microphthalmic mother. The mechanism underlying this intrafamilial phenotypic variability remains unclear, but other genetic factors are likely to be necessary for the manifestation of the otocephalic phenotype.
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