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Case Reports
. 2002 Dec;25(8):695-6.
doi: 10.1023/a:1022833332162.

A novel 6 bp insertion in exon 7 associated with an unusual phenotype in a family with Fabry disease

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Case Reports

A novel 6 bp insertion in exon 7 associated with an unusual phenotype in a family with Fabry disease

Th Kroepfl et al. J Inherit Metab Dis. 2002 Dec.

Abstract

A male patient presented with oligosymptomatic Fabry disease (end stage renal failure and non-obstructive cardiomyopathy) at around 30 years of age. His leukocyte alpha-galactosidase activity (alpha-gal) was 2.6% of controls. A 50-year-old sister had similar cardiac symptoms and her asymptomatic heterozygous daughter (33 years) had normal enzyme activity. All three patients carried a novel, 6bp insertion on exon 7 of the AGAL gene. The majority of male Fabry patients carrying mutations in exon 7 have residual alpha-gal below 1% and suffer from neuropathic pain. Comparable oligosymptomatic phenotypes in Caucasian patients carry a common mutation on exon 6 (R301Q) and have a significantly later onset. The course of the disease is likely to be altered by recombinant enzyme therapy in the future. Therefore, a thorough documentation of phenotypes, residual activities and underlying genotypes is of current interest.

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References

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