Higher dosing of alglucosidase alfa improves outcomes in children with Pompe disease: a clinical study and review of the literature.

Published

Journal Article

PURPOSE: Enzyme replacement therapy (ERT) with recombinant human acid-α glucosidase (rhGAA) at standard dose of 20 mg/kg every other week is insufficient to halt the long-term progression of myopathy in Pompe disease. METHODS: We conducted a retrospective study on infantile-onset Pompe disease (IPD) and late-onset Pompe disease (LOPD) patients with onset before age 5 years, ≥12 months of treatment with standard dose ERT, and rhGAA immunogenic tolerance prior to dose escalation. Long-term follow-up of up to 18 years was obtained. We obtained physical therapy, lingual strength, biochemical, and pulmonary assessments as dose was escalated. RESULTS: Eleven patients with IPD (n = 7) or LOPD (n = 4) were treated with higher doses of up to 40 mg/kg weekly. There were improvements in gross motor function measure in 9/10 patients, in lingual strength in 6/6 patients, and in pulmonary function in 4/11. Significant reductions in urinary glucose tetrasaccharide, creatine kinase, aspartate aminotransferase, and alanine aminotransferase were observed at 40 mg/kg weekly compared with lower doses (p < 0.05). No safety or immunogenicity concerns were observed at higher doses. CONCLUSION: Higher rhGAA doses are safe, improve gross motor outcomes, lingual strength, pulmonary function measures, and biochemical markers in early-onset Pompe disease, and should be considered in patients with clinical and functional decline.

Full Text

Duke Authors

Cited Authors

  • Khan, AA; Case, LE; Herbert, M; DeArmey, S; Jones, H; Crisp, K; Zimmerman, K; ElMallah, MK; Young, SP; Kishnani, PS

Published Date

  • May 2020

Published In

Volume / Issue

  • 22 / 5

Start / End Page

  • 898 - 907

PubMed ID

  • 31904026

Pubmed Central ID

  • 31904026

Electronic International Standard Serial Number (EISSN)

  • 1530-0366

Digital Object Identifier (DOI)

  • 10.1038/s41436-019-0738-0

Language

  • eng

Conference Location

  • United States