Fabry disease caused by the GLA p.Phe113Leu (p.F113L) variant: Natural history in males

Add time:08/30/2019    Source:sciencedirect.com

Background, aims and methodsThe α-galactosidase gene (GLA) c.337T>C/p.Phe113Leu variant was originally described in patients with late-onset cardiac forms of Fabry disease (FD), who had residual α-galactosidase activity. It has since emerged as the most commonly reported GLA variant in Portuguese subjects diagnosed with FD but is also prevalent in the Italian population, where two boys carrying the GLA Leu113 allele were identified in a large-scale newborn screening program, the variant allele segregating in both cases with the same surrounding haplotype. To further delineate the genotype-phenotype correlations of this GLA variant, we have reviewed the natural history and clinical phenotypes of 11 symptomatic Portuguese males, from 10 unrelated families originating from several different areas in mainland Portugal and Madeira Island, who were diagnosed with FD associated with the GLA Leu113 allele in a diversity of clinical and screening settings. Nine of the patients were the probands of their respective families. To test whether the GLA Leu113 allele inherited by the 10 Portuguese and the two Italian families resulted from independent mutational events, we have additionally performed a haplotype analysis with 5 highly polymorphic, closely linked microsatellite markers surrounding the GLA gene.

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