Abstract Details

Title Effect Size Analysis of Cipaglucosidase Alfa Plus Miglustat Versus Alglucosidase Alfa in ERT-experienced Adults with Late-onset Pompe Disease in PROPEL

Topic Neuromuscular and Clinical Neurophysiology (EMG)

Presentation(s) S21 - Inherited Myopathies and Neuropathies: New Therapeutic Approaches and Observations (1:24 PM-1:36 PM)

Poster/Presentation
Number 003

Objective To analyze within-group effect sizes of cipaglucosidase alfa plus miglustat (cipa+mig) and alglucosidase alfa (alg) for efficacy, quality of life (QoL), and biomarker variables in ERT-experienced patients.

Background The randomized, double-blind PROPEL study (ATB200-03; NCT03729362) compared the efficacy and safety of the investigational two-component enzyme replacement therapy (ERT) cipa+mig with alg plus placebo in adults with late-onset Pompe disease (LOPD); 77% of patients had received ERT with alg before study entry (median ERT duration 7.4 years).

Design/Methods We analyzed within-group effect sizes of cipa+mig and alg for outcome variables including motor function, lung function and muscle strength tests; patient-reported outcomes/QoL; and biomarkers in ERT-experienced patients. Standardized within-group effect sizes (Cohen’s d for correlated measurements from baseline to week 52) were calculated by dividing the mean change from baseline by the standard deviation of the difference scores.

Results ERT-experienced patients remaining on alg (n=30) generally showed worsening (d<−0.2) or stability (−0.2≤d≥+0.2) across most outcomes, while those switching to cipa+mig (n=65) mostly showed improvement (d>0.2) or stability. Patients remaining on alg demonstrated statistically significant within-group worsening for sitting and supine forced vital capacity; slow vital capacity; maximal expiratory pressure; and creatine kinase (CK) and hexose tetrasaccharide (Hex4) levels, and no significant improvements for any outcomes. Patients switching to cipa+mig did not demonstrate significant within-group worsening for any outcomes and showed significant improvements for 6-minute walk distance (absolute and % predicted); upper, lower and overall manual muscle test; Patient-Reported Outcomes Measurement Information System (PROMIS)−Fatigue; Physician and Subject Global Impression of Change (five of eight subdomains); and CK and Hex4 levels.

Conclusions

This analysis shows that ERT-experienced patients with LOPD who switched from alg to cipa+mig treatment achieved improvements in a number of outcomes, highlighting the potential of cipa+mig to become an important treatment option for these patients. Sponsored by Amicus Therapeutics Inc.

Authors/Disclosures
Hani Kushlaf, MD, FAAN (University of Cincinnati) PRESENTER	Dr. Kushlaf has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Alexion AstraZeneca Rare Disease. Dr. Kushlaf has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Amgen. Dr. Kushlaf has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Catalyst Pharmaceuticals. Dr. Kushlaf has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for UCB. Dr. Kushlaf has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sarepta Therapeutics . Dr. Kushlaf has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Amicus Therapeutics .
Drago Bratkovic	No disclosure on file
Barry Byrne	Barry Byrne has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Alexion. Barry Byrne has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Rocket Pharma. Barry Byrne has received personal compensation in the range of $5,000-$9,999 for serving as an officer or member of the Board of Directors for Muscular Dystrophy Association.
Kristl Claeys, MD, PhD (University Hopitals Leuven and University of Leuven (KU Leuven))	Dr. Claeys has nothing to disclose.
Jordi Diaz-Manera (Newcastle University)	No disclosure on file
Mazen M. Dimachkie, MD, FAAN (University of Kansas Medical Center)	Dr. Dimachkie has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Sanofi. Dr. Dimachkie has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Octapharma. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for ArgenX. Dr. Dimachkie has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Catalyst. Dr. Dimachkie has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Takeda. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Medlink. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for CSL Behring. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Astellas. Dr. Dimachkie has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Janssen. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Dianthus. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for TACT / Treat NMD. Dr. Dimachkie has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Cabaletta Bio. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Clinical Neurological Society of America, Inc . Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Ig Society, Inc. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Abcuro. Dr. Dimachkie has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Amicus. Dr. Dimachkie has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Horizon. Dr. Dimachkie has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for EMD Serono. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Ipsen. Dr. Dimachkie has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Nuvig. Dr. Dimachkie has received personal compensation in the range of $5,000-$9,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Fortrea. The institution of Dr. Dimachkie has received research support from NIH. Dr. Dimachkie has received intellectual property interests from a discovery or technology relating to health care. Dr. Dimachkie has received intellectual property interests from a discovery or technology relating to health care. Dr. Dimachkie has received publishing royalties from a publication relating to health care.
Priya Kishnani, MD (Duke University)	Priya Kishnani, MD has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Sanofi/Genzyme. Priya Kishnani, MD has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Amicus Therapeutics. Priya Kishnani, MD has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Maze Therapeutics. Priya Kishnani, MD has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for JCR Pharmaceutical. Priya Kishnani, MD has received personal compensation in the range of $500,000-$999,999 for serving as a Consultant for Asklepios Biopharmaceutical Inc. (AskBio). Priya Kishnani, MD has received personal compensation in the range of $0-$499 for serving on a Scientific Advisory or Data Safety Monitoring board for Sanofi/Genzyme. Priya Kishnani, MD has received personal compensation in the range of $0-$499 for serving on a Scientific Advisory or Data Safety Monitoring board for Amicus Therapeutics. Priya Kishnani, MD has received personal compensation in the range of $0-$499 for serving on a Scientific Advisory or Data Safety Monitoring board for Baebies, Inc.. The institution of Priya Kishnani, MD has received research support from Sanofi/Genzyme. Priya Kishnani, MD has received research support from Amicus Therapeutics. Priya Kishnani, MD has received intellectual property interests from a discovery or technology relating to health care. Priya Kishnani, MD has received intellectual property interests from a discovery or technology relating to health care.
Mark Roberts	Mark Roberts has nothing to disclose.
Antonio Toscano, MD	Dr. Toscano has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sanofi Genzyme.
Jeff Castelli (Amicus Therapeutics)	No disclosure on file
Frederick Holdbrook	Frederick Holdbrook has received personal compensation for serving as an employee of Amicus Therapeutics, Inc. Frederick Holdbrook has stock in Amicus Therapeutics, Inc.
Sheela Das (AmicusTherapeutics)	No disclosure on file
Yasmine Wasfi	No disclosure on file
Benedikt Schoser	Benedikt Schoser has received personal compensation for serving as an employee of Alexion. Benedikt Schoser has received personal compensation for serving as an employee of Argenx. Benedikt Schoser has received personal compensation for serving as an employee of Amicus. Benedikt Schoser has received personal compensation for serving as an employee of Astellas. Benedikt Schoser has received personal compensation for serving as an employee of Denali. Benedikt Schoser has received personal compensation for serving as an employee of Avidity . Benedikt Schoser has received personal compensation for serving as an employee of Sanofi. Benedikt Schoser has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Taysha. Benedikt Schoser has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Astellas. Benedikt Schoser has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Encoded. Benedikt Schoser has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Kedrion.
Tahseen Mozaffar, MD, FAAN (University of California Irvine)	Dr. Mozaffar has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Alexion Pharmaceuticals. Dr. Mozaffar has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Argenx. Dr. Mozaffar has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Sanofi-Genzyme. Dr. Mozaffar has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for Amicus. Dr. Mozaffar has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Grifols. Dr. Mozaffar has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Astellas Gene Therapy. Dr. Mozaffar has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Bayer. Dr. Mozaffar has received personal compensation in the range of $10,000-$49,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Sarepta. Dr. Mozaffar has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Applied Therapeutics. The institution of Dr. Mozaffar has received research support from NIH. The institution of Dr. Mozaffar has received research support from Muscular Dystrophy Association. The institution of Dr. Mozaffar has received research support from Sanofi. The institution of Dr. Mozaffar has received research support from Argenx. The institution of Dr. Mozaffar has received research support from Amicus Therapeutics. The institution of Dr. Mozaffar has received research support from Astellas Gene Therpay. The institution of Dr. Mozaffar has received research support from Cartesian. The institution of Dr. Mozaffar has received research support from Cabaletta. Dr. Mozaffar has received personal compensation in the range of $500-$4,999 for serving as a Study Section Member with NIH.

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