Title
A known SOST gene mutation causes sclerosteosis in a familial and an isolated case from Brazili A known SOST gene mutation causes sclerosteosis in a familial and an isolated case from Brazili
Author
Faculty/Department
Faculty of Pharmaceutical, Biomedical and Veterinary Sciences . Biomedical Sciences
Publication type
article
Publication
New York, N.Y. ,
Subject
Human medicine
Source (journal)
Genetic testing. - New York, N.Y.
Volume/pages
12(2008) :4 , p. 475-479
ISSN
1090-6576
ISI
000261730600003
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Sclerosteosis is a severe, rare, autosomal recessive bone condition that is characterized by a progressive craniotubular hyperostosis. The main features are a significant sclerosis of the long bones, ribs, pelvis, and skull, leading to facial distortion and entrapment of cranial nerves. Clinical features include a tall stature, nail dysplasia, cutaneous syndactyly of some fingers, and raised intracranial pressure. The sclerosteosis gene has been mapped to chromosome 17q1221 and is currently known as the SOST gene encoding the sclerostin protein. Here, we report on one familial and one isolated case of Brazilian origin with the clinical and molecular diagnosis of sclerosteosis. The radiological and clinical features are described, and the diagnosis of sclerosteosis was confirmed in both cases by mutation analysis of the SOST gene showing a homozygous nonsense mutation (Trp124X) in the two patients. We reported this mutation previously in other sclerosteosis patients from a consanguineous Brazilian family. Interestingly, all three families were from the same state in Brazil, but they denied familial relationship. These patients confirm the clinical picture as found in other cases with a loss of function mutation in the SOST gene.
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