Migalastat stabilizes mutant α-galactosidase in Fabry's disease, reducing globotriaosylceramide deposition. In this study, the percentage of patients with a decrease of 50% or more in kidney interstitial capillary deposition at 6 months was similar in the migalastat and placebo groups. Fabry’s disease is a rare, progressive, and devastating X-linked disorder caused by the functional deficiency of lysosomal α-galactosidase. 1 The resultant accumulation of glycosphingolipids, predominantly globotriaosylceramide (GL-3), can lead to multisystem disease and early death. 2 Binding of the pharmacologic chaperone migalastat to the active site of α-galactosidase stabilizes certain mutant enzymes, thus facilitating proper trafficking to lysosomes, where dissociation of migalastat allows α-galactosidase to catabolize accumulated substrates. 3 – 7 In patients with mutant enzymes that are identified with the validated assay, orally administered migalastat may be an alternative treatment option for addressing certain unmet medical needs associated with enzyme-replacement therapy — for . . .