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  • Title: STIG study: real-world data of long-term outcomes of adults with Pompe disease under enzyme replacement therapy with alglucosidase alfa.
    Author: Gutschmidt K, Musumeci O, Díaz-Manera J, Chien YH, Knop KC, Wenninger S, Montagnese F, Pugliese A, Tavilla G, Alonso-Pérez J, Hwu PW, Toscano A, Schoser B.
    Journal: J Neurol; 2021 Jul; 268(7):2482-2492. PubMed ID: 33543425.
    Abstract:
    BACKGROUND: Pompe disease is one of the few neuromuscular diseases with an approved drug therapy, which has been available since 2006. Our study aimed to determine the real-world long-term efficacy and safety of alglucosidase alfa. METHODS: This multicenter retrospective study (NCT02824068) collected data from adult Pompe disease patients receiving ERT for at least 3 years. Demographics and baseline characteristics, muscle strength, lung function (FVC), walking capability (6MWT), and safety were assessed once a year. Evaluation was done on the group and individual levels, using quantitative linear models (t test) and general univariate linear models (ANOVA). FINDINGS: Sixty-eight adult Pompe disease patients from four countries (Spain, Taiwan, Italy, Germany (STIG)) participated. The mean follow-up was 7.03 years ± 2.98. At group level in all outcome measures, an initial improvement followed by a secondary decline was observed. After 10 years, the 6MWT%pred showed the most sustained positive effect (p = 0.304). The MRC%max remained stable with a mild decline (p = 0.131), however, FVC%pred deteriorated significantly (p < 0.001) by 14.93% over 10 years of ERT. The progression rate of FVC%pred under ERT could be explained in most of the patients (83.5%) by the disease severity at baseline. Furthermore, our study shows a decline in the FVC combined with an increase in non-invasive and invasive ventilation requirements in adult Pompe disease patients over time. CONCLUSIONS: The STIG real-world study confirms an initial efficacy of ERT in the first years with a secondary sustained decline in multiple outcome measures. Further efforts are required to establish a more valid long-term monitoring and improved therapies.
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