Czeschik, J. C. and Voigt, C. and Alanay, Y. and Albrecht, B. and Avci, S. and FitzPatrick, D. and Goudie, D. R. and Hehr, U. and Hoogeboom, A. J. and Kayserili, H. and Simsek-Kiper, P. O. and Klein-Hitpass, L. and Kuechler, A. and Lopez-Gonzalez, V. and Martin, M. and Rahmann, S. and Schweiger, B. and Splitt, M. and Wollnik, B. and Luedecke, H-J and Zeschnigk, M. and Wieczorek, D. (2013) Clinical and mutation data in 12 patients with the clinical diagnosis of Nager syndrome. HUMAN GENETICS, 132 (8). pp. 885-898. ISSN 0340-6717,
Full text not available from this repository. (Request a copy)Abstract
Nager syndrome (MIM #154400) is the best-known preaxial acrofacial dysostosis, mainly characterized by craniofacial and preaxial limb anomalies. The craniofacial abnormalities mainly consist of downslanting palpebral fissures, malar hypoplasia, micrognathia, external ear anomalies, and cleft palate. The preaxial limb defects are characterized by radial and thumb hypoplasia or aplasia, duplication of thumbs and proximal radioulnar synostosis. Haploinsufficiency of SF3B4 (MIM *605593), which encodes SAP49, a component of the pre-mRNA spliceosomal complex, has recently been identified as the underlying cause of Nager syndrome. In our study, we performed exome sequencing in two and Sanger sequencing of SF3B4 in further ten previously unreported patients with the clinical diagnosis of Nager syndrome, including one familial case. We identified heterozygous SF3B4 mutations in seven out of twelve patients. Four of the seven mutations were shown to be de novo; in three individuals, DNA of both parents was not available. No familial mutations were discovered. Three mutations were nonsense, three were frameshift mutations and one T > C transition destroyed the translation start signal. In three of four SF3B4 negative families, EFTUD2 was analyzed, but no pathogenic variants were identified. Our results indicate that the SF3B4 gene is mutated in about half of the patients with the clinical diagnosis of Nager syndrome and further support genetic heterogeneity for this condition.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TREACHER-COLLINS-SYNDROME; ACROFACIAL DYSOSTOSIS; MANDIBULOFACIAL DYSOSTOSIS; HAPLOINSUFFICIENCY; COMPONENT; ATRESIA; Acrofacial dysostosis; Preaxial limb defect; Thumb hypoplasia; Radial hypoplasia; SF3B4; EFTUD2; Exome sequencing |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Humangenetik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Apr 2020 10:29 |
| Last Modified: | 06 Apr 2020 10:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/16325 |
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