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  • Title: Simpson-Golabi-Behmel syndrome: genotype/phenotype analysis of 18 affected males from 7 unrelated families.
    Author: Hughes-Benzie RM, Pilia G, Xuan JY, Hunter AG, Chen E, Golabi M, Hurst JA, Kobori J, Marymee K, Pagon RA, Punnett HH, Schelley S, Tolmie JL, Wohlferd MM, Grossman T, Schlessinger D, MacKenzie AE.
    Journal: Am J Med Genet; 1996 Dec 11; 66(2):227-34. PubMed ID: 8958336.
    Abstract:
    Simpson-Golabi-Behmel syndrome (SGBS) is an X-linked overgrowth disorder recently shown to be caused by mutations in the heparan sulfate proteoglycan GPC3 [Pilia et al., Nat Genet; 12:241-247 1996]. We have used Southern blot analysis and polymerase chain reaction amplification of intra-exonic sequences to identify four new GPC3 mutations and further characterize three previously reported SGBS mutations. De novo GPC3 mutations were identified in 2 families. In general, the mutations were unique deletions ranging from less than 0.1 kb to more than 300 kb in length with no evidence of a mutational hot spot discerned. The lack of correlation between the phenotype of 18 affected males from these 7 families and the location and size of the GPC3 gene mutations suggest that SGBS is caused by a nonfunctional GPC3 protein.
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