The migalastat GLP-HEK assay is the gold standard for determining amenability in patients with Fabry disease.

Mol Genet Metab Rep

Medical Genetics Service, HCPA and Department of Genetics, UFRGS, Porto Alegre, Brazil.

Published: September 2019

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6656697PMC
http://dx.doi.org/10.1016/j.ymgmr.2019.100494DOI Listing

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and Amenability to Migalastat in Fabry Disease.

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Internal Medicine D, Department of Nephrology, Hypertension and Rheumatology, and Interdisciplinary Fabry Center Münster (IFAZ), University Hospital Münster, 48149 Münster, Germany.

Migalastat (1-deoxygalactonojirimycin) is approved for the treatment of Fabry disease (FD) in patients with an amenable mutation. Currently, there are at least 367 amenable and 711 non-amenable mutations known, based on an good laboratory practice (GLP) assay. Recent studies demonstrated that amenability of mutations did not necessarily correspond to amenability of migalastat-treated patients.

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Bioanalytical & Biomarker Development, Shire, 300 Shire Way, Lexington, MA, USA. Electronic address:

Fabry disease is a lysosomal storage disorder caused by mutations in the GLA gene that encodes for the lysosomal enzyme α-galactosidase A (α-Gal A). Reduced or absent α-Gal A activity leads to substrate accumulation and deleterious effects in multiple organs. Migalastat is a pharmacological chaperone that may stabilize the enzyme in specific GLA variants, considered amenable, assisting enzyme trafficking to lysosomes and thus increasing enzyme activity.

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Purpose: Fabry disease is an X-linked lysosomal storage disorder caused by mutations in the α-galactosidase A gene. Migalastat, a pharmacological chaperone, binds to specific mutant forms of α-galactosidase A to restore lysosomal activity.

Methods: A pharmacogenetic assay was used to identify the α-galactosidase A mutant forms amenable to migalastat.

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