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Current Topics in Genetics   Volumes    Volume 3 
The OFD1 (CXORF5) gene at Xp22 is not mutated in a subset of Simpson-Golabi-Behmel syndrome patients
Valeria Romanelli, Luis Magano, Mabel Segovia, Viviana Cosentino, Antonio González- Meneses, Miguel del Campo, Luis A. Pérez Jurado, Maria Luisa Giovannucci Uzielli, Virginia Soler, Amparo Sanchis, Pedro Arias, Ignacio Incera, Ricardo Gracia Bouthelier, Pablo Lapunzina
Pages: 45 - 47
Number of pages: 3
Current Topics in Genetics
Volume 3 

Copyright © 2008 Research Trends. All rights reserved

Simpson-Golabi-Behmel syndrome (SGBS, MIM #312870) is an X-linked overgrowth disorder comprising multiple congenital anomalies and increased risk for embryonal tumors, mainly Wilms tumor, hepatoblastoma and neuroblastoma [1-6]. It is characterized by pre- and postnatal overgrowth, visceral and skeletal anomalies, coarse face, macroglossia, supernumerary nipples, congenital heart defects and hypotonia. In some SGBS patients mutations/deletions of GPC3 localized at Xq26 have been observed [9-11]. We have evaluated 27 patients from the Spanish Overgrowth Syndrome Registry (who fulfil clinical criteria for SGBS) for both mutations and deletions of the GPC3 and deletions of GPC4 using a combination of MLPA and direct sequence analysis. Among them we found 9 patients with abnormalities on the GPC3 gene and 18 patients who did not have any aberration on these genes This result raised the possibility that those patients might have mutations of the OFD1 gene at the Xp22 region, so we conducted a mutation analysis of this gene through direct bi-directional sequencing of the 23 exons using specific primers and comparing with the published sequence. We found that none of the 18 patient presented deleterious mutations of the OFD1 gene. Our work confirms that a substantial proportion of patients with SGBS phenotype still remains without a molecularly proven cause of the disease.
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