Safety and pharmacokinetics of agalsidase alfa in patients with Fabry disease and end-stage renal disease

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Abstract

Background. Fabry disease (FD) is caused by an X-linked deficiency in the activity of α-galactosidase A and the resultant accumulation of globotriaosylceramide (Gb3) in multiple tissues. Nearly all classically affected males with FD experience kidney dysfunction, with progression to end-stage renal disease (ESRD) in the third decade of life or shortly thereafter. Methods. Twenty-two FD patients (20 men and 2 women) receiving dialysis or who had a history of kidney transplantation were treated with agalsidase alfa in an open label setting using the same dosing regimen given to patients without ESRD (0.2 mg/kg every other week). Pharmacokinetics (PK) were determined during and following the initial dose, and safety was evaluated during therapy. Change in plasma Gb3 level was used as a surrogate marker of enzyme activity in vivo. Results. A typical biphasic plasma elimination profile was seen in both dialysis and transplant patients, similar to that observed in 18 non-ESRD FD patients. Calculated PK parameters were similar to the three patient groups. In the male patients, plasma Gb3 level declined by 43% after 6 months (P<0.001). Infusion reactions were experienced by 8 of 21 (38%) patients, but did not result in any infusions being stopped prematurely. Anti-agalsidase alfa IgG antibodies were detected in 15.8% of males and 0% female patients. No anti-agalsidase alfa IgE antibodies were detected. Conclusions. The same dosing regimen of agalsidase alfa may be safely administered to FD patients with ESRD as given to those without ESRD. © The Author [2007]. Published by Oxford University Press on behalf of ERA-EDTA. All rights reserved.

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Pastores, G. M., Boyd, E., Crandall, K., Whelan, A., Piersall, L., & Barnett, N. (2007). Safety and pharmacokinetics of agalsidase alfa in patients with Fabry disease and end-stage renal disease. Nephrology Dialysis Transplantation, 22(7), 1920–1925. https://doi.org/10.1093/ndt/gfm096

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