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Am J Hum Genet. 2011 Dec 9;89(6):773-81. doi: 10.1016/j.ajhg.2011.11.002.

Homozygosity mapping and candidate prioritization identify mutations, missed by whole-exome sequencing, in SMOC2, causing major dental developmental defects.

Author information

1
Faculty of Dentistry, University of Strasbourg, 1 place de l'Hôpital, Strasbourg, France.

Abstract

Inherited dental malformations constitute a clinically and genetically heterogeneous group of disorders. Here, we report on a severe developmental dental defect that results in a dentin dysplasia phenotype with major microdontia, oligodontia, and shape abnormalities in a highly consanguineous family. Homozygosity mapping revealed a unique zone on 6q27-ter. The two affected children were found to carry a homozygous mutation in SMOC2. Knockdown of smoc2 in zebrafish showed pharyngeal teeth that had abnormalities reminiscent of the human phenotype. Moreover, smoc2 depletion in zebrafish affected the expression of three major odontogenesis genes: dlx2, bmp2, and pitx2.

PMID:
22152679
PMCID:
PMC3234372
DOI:
10.1016/j.ajhg.2011.11.002
[Indexed for MEDLINE]
Free PMC Article

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