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December 05, 2017; 89 (23) Article

Long-term benefit of enzyme replacement therapy in Pompe disease

A 5-year prospective study

Esther Kuperus, Michelle E. Kruijshaar, Stephan C.A. Wens, Juna M. de Vries, Marein M. Favejee, Jan C. van der Meijden, Dimitris Rizopoulos, Esther Brusse, Pieter A. van Doorn, Ans T. van der Ploeg, Nadine A.M.E. van der Beek
First published November 8, 2017, DOI: https://doi.org/10.1212/WNL.0000000000004711
Esther Kuperus
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Michelle E. Kruijshaar
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Stephan C.A. Wens
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Juna M. de Vries
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Marein M. Favejee
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Jan C. van der Meijden
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Dimitris Rizopoulos
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Esther Brusse
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Pieter A. van Doorn
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Ans T. van der Ploeg
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Nadine A.M.E. van der Beek
From the Erasmus MC University Medical Center (E.K., S.C.A.W., J.M.d.V., E.B., P.A.v.D., N.A.M.E.v.d.B.), Center for Lysosomal and Metabolic Diseases, Department of Neurology; Erasmus MC University Medical Center–Sophia Children's Hospital (M.E.K., J.C.v.d.M., A.T.v.d.P.), Center for Lysosomal and Metabolic Diseases, Department of Pediatrics; Erasmus MC University Medical Center (M.M.F.), Center for Lysosomal and Metabolic Diseases, Department of Rehabilitation Medicine and Physical Therapy; and Erasmus MC University Medical Center (D.R.), Department of Biostatistics, Rotterdam, the Netherlands.
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Full PDF
Citation
Long-term benefit of enzyme replacement therapy in Pompe disease
A 5-year prospective study
Esther Kuperus, Michelle E. Kruijshaar, Stephan C.A. Wens, Juna M. de Vries, Marein M. Favejee, Jan C. van der Meijden, Dimitris Rizopoulos, Esther Brusse, Pieter A. van Doorn, Ans T. van der Ploeg, Nadine A.M.E. van der Beek
Neurology Dec 2017, 89 (23) 2365-2373; DOI: 10.1212/WNL.0000000000004711

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Abstract

Objective: To determine the effect of enzyme replacement therapy (ERT) after 5 years and to identify predictors for a favorable response because few data are available on the long-term efficacy of ERT in Pompe disease.

Methods: We included 102 adult patients with Pompe disease in a nationwide, prospective cohort study. We assessed muscle strength (manual muscle testing with Medical Research Council [MRC] grading, handheld dynamometry [HHD]), muscle function (6-minute walk test, Quick Motor Function Test), daily life activities (Rasch-Built Pompe-Specific Activity [R-PAct] Scale), and pulmonary function (forced vital capacity [FVC] in upright and supine positions, maximum inspiratory and expiratory pressures) at 3- to 6-month intervals before and after the start of ERT. Data were analyzed with linear mixed-effects models for repeated measurements.

Results: Median follow-up duration was 6.1 years (range 0.4–7.9 years), of which 5.0 years (range 0.2–7.3 years) were during ERT. Treated patients had better muscle strength (MRC sum score +6.6 percentage points [pp]; HHD sum score +9.6 pp, both p < 0.0001), activity levels (R-PAct +10.8 pp, p < 0.002), and pulmonary function (FVC upright +7.3 pp, FVC supine +7.6 pp, both p < 0.0003) than expected for their untreated disease course. Walking distance improved (416 vs 376 m at baseline, p = 0.03). The largest increase was seen during the first 2 to 3 years of treatment. Response to treatment was similar between groups regardless of sex, age, or disease duration.

Conclusions: Long-term ERT positively affects muscle strength, pulmonary function, and daily life activities in adult patients with Pompe disease, with a peak effect at ≈2 to 3 years of treatment.

Classification of evidence: This study provides Class IV evidence that for patients with Pompe disease, long-term ERT positively affects muscle strength, pulmonary function, and daily life activities.

GLOSSARY

ERT=
enzyme replacement therapy;
FVC=
forced vital capacity;
HHD=
handheld dynamometry;
IAR=
infusion-associated reaction;
MEP=
maximum expiratory pressure;
MIP=
maximum inspiratory pressure;
pp=
percentage points;
QMFT=
Quick Motor Function Test;
R-PAct=
Rasch-Built Pompe-Specific Activity;
6MWT=
6-minute walk test

Footnotes

  • Go to Neurology.org for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article.

  • Supplemental data at Neurology.org

  • Received April 29, 2017.
  • Accepted in final form September 18, 2017.
  • © 2017 American Academy of Neurology
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