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Homozygous N396T mutation in Gaucher disease: Portuguese sisters with markedly different phenotypes

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Author(s)

Samantha Kimball, Francis Choy, Agnes Zay, Dominick Amato

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Abstract

Gaucher disease (GD) is characterized by reduced activity of glucocerebrosidase leading to complications in the reticuloendothelial system. N396T, a rarer mutation of the glucocerebrosidase gene, has been encountered in Portuguese populations and has generally been associated with milder phenotypes. This report presents brief histories of two Portuguese sisters, both with homozygous N396T mutations. These patients are phenotypically very different despite the fact that in both patients residual enzyme activity is very low. The case of patient 1 is complicated by comorbid diabetes mellitus and human immunodeficiency virus (HIV) infection. Enzyme replacement therapy (ERT) improved this patient's clinical picture sufficiently to enable antiretroviral treatment to proceed for the HIV. This report demonstrates the poor correlation of clinical GD with genotype as well as with residual enzyme activity. It further illustrates how treatment of the underlying GD with ERT improved symptoms allowing for antiretroviral therapy thereby improving both the GD and HIV.

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Original languageEnglish
Pages (from-to)17-20
Number of pages4
JournalJournal of Medical Case Reports
Volume4
DOIs
Publication statusPublished - 2011

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