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- W4281674954 abstract "Pompe disease is a rare, progressive neuromuscular disorder caused by deficiency of lysosomal acid α-glucosidase (GAA) and subsequent glycogen accumulation. Avalglucosidase alfa, a recombinant human GAA enzyme replacement therapy designed for increased cellular uptake and glycogen clearance, has been studied for long-term efficacy and safety in patients with late-onset Pompe disease (LOPD). Here we report up to 6.5 years' experience with avalglucosidase alfa during the NEO1 and NEO-EXT studies.NEO1 participants with LOPD, either treatment-naïve (Naïve Group) or receiving alglucosidase alfa for ≥9 months (Switch Group), received avalglucosidase alfa (5, 10, or 20 mg/kg every other week [qow]) for 6 months before entering NEO-EXT and continued their NEO1 dose until all proceeded with 20 mg/kg qow. Safety and efficacy, a pre-specified exploratory secondary outcome, were assessed; slopes of change for efficacy outcomes were calculated from a repeated mixed-measures model.Twenty-four participants enrolled in NEO1 (Naïve Group, n=10; Switch Group, n=14); 21 completed and 19 entered NEO-EXT; in February 2020, 17 participants remained in NEO-EXT, with data up to 6.5 years. Avalglucosidase alfa was generally well-tolerated during NEO-EXT, with a safety profile consistent with that in NEO1. No deaths or treatment-related life-threatening serious adverse events occurred. Eighteen participants developed anti-drug antibodies without apparent impact on clinical outcomes. No participants who were tested developed immunoglobulin E antibodies. Upright forced vital capacity (FVC) %predicted remained stable in most participants, with slope estimates (95% confidence intervals) of -0.473/year (-1.188, 0.242) and -0.648/year (-1.061, -0.236) in the Naïve and Switch Groups, respectively. Six-minute walk test (6MWT) %predicted was also stable for most participants, with slope estimates of -0.701/year (-1.571, 0.169) and -0.846/year (-1.567, -0.125) for the Naïve and Switch Groups, respectively. Improvements in 6MWT distance were observed in most participants aged <45 years at NEO1 enrollment, in both the Naïve and Switch Groups.Avalglucosidase alfa was generally well-tolerated for up to 6.5 years in adult participants with LOPD either naïve to alglucosidase alfa or who had previously received alglucosidase alfa for ≥9 months.Classification of Evidence: This study provides Class IV evidence of long-term tolerability and sustained efficacy of avalglucosidase alfa in patients with LOPD after up to 6.5 years." @default.
- W4281674954 created "2022-06-13" @default.
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- W4281674954 date "2022-08-02" @default.
- W4281674954 modified "2023-10-18" @default.
- W4281674954 title "Long-term Safety and Efficacy of Avalglucosidase Alfa in Patients With Late-Onset Pompe Disease" @default.
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- W4281674954 doi "https://doi.org/10.1212/wnl.0000000000200746" @default.
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