Avalglucosidase alfa treatment for children with Pompe disease
Official title: A Single-arm, Open-label, Phase 4 Study to Evaluate the Safety and Efficacy of Avalglucosidase Alfa in Chinese Participants With Infantile-onset Pompe Disease (IOPD)
Run by Sanofi · NCT06666413 · Data updated 2026-11-12
This study is testing a new treatment called avalglucosidase alfa to see if it helps children with infantile-onset Pompe disease feel better over a year.
Quick facts
| Phase | Phase 4 |
|---|---|
| Study type | Interventional |
| Ages | Any age to 17 Years |
| Sex | All |
| Enrollment | 13 (estimated) |
| Sponsor | Sanofi Industry-sponsored |
| Locations | 1 site (Shanghai) |
| Status | Recruiting |
| Started | May 7, 2025 |
| Main results expected | May 2, 2028 |
| Study ends | May 2, 2028 |
| Registry record updated | March 23, 2026 |
| Trial ID | NCT06666413 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates for this study are children under 18 years old with a confirmed diagnosis of infantile-onset Pompe disease and documented cardiomyopathy.
✕Probably not a fit
Patients with major congenital abnormalities or significant organic diseases unrelated to Pompe disease may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a 52-week, open-label, single-arm study assessing the safety and efficacy of avalglucosidase alfa IV infusion in Chinese participants diagnosed with infantile-onset Pompe disease (IOPD). The study includes a screening period of up to 8 weeks, followed by a treatment phase lasting 52 weeks, and a 4-week follow-up. Participants will have a total of 30 visits, including 29 site visits and one follow-up phone call. The study aims to evaluate the effects of the treatment on participants who are either treatment-naïve or have previously received enzyme replacement therapy.
Why it matters
Potential benefit: If successful, this treatment could significantly improve the health outcomes and quality of life for children with Pompe disease.
How similar studies have gone: Previous studies on enzyme replacement therapies for Pompe disease have shown promising results, indicating potential for success with this approach.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Participant must be \<18 years of age, at the time of signing the informed consent. * Participants have documented onset of Pompe disease symptoms before 12 months of age (corrected for gestation if born before 40 weeks); and diagnosis of IOPD is confirmed by GAA enzyme deficiency from any tissue source and GAA gene pathogenic mutations. * Participants must have documented cardiomyopathy at the time of diagnosis. * Contraceptive use should be consistent with local regulations Participant's parent/legally authorized representative (LAR) must be capable of giving signed informed consent. Exclusion Criteria: Participants are excluded from the study if any of the following criteria apply: * Participants with major congenital abnormality that, in the opinion of the Investigator, would preclude participation in the study or potentially decrease survival. * Participants with clinically significant organic disease (with the exception of symptoms relating to Pompe disease). * Participants who have received an ERT other than alglucosidase alfa or avalglucosidase alfa, or any other treatment for Pompe disease, including gene therapy prior to the enrollment. * Participants who have received alglucosidase alfa or avalglucosidase alfa less than 1 week prior to the first dose of avalglucosidase alfa given as IMP Participants who are anticipated to take prohibited therapy (ie, any other treatment for Pompe disease) during this study. * Participants who have taken other investigational drugs (not Pompe disease specific) within 30 days or 5 elimination half-lives in blood of that drug before enrollment, whichever is longer, or are anticipated to take any other concurrent investigational treatments. * Participants not suitable for participation, whatever the reason, as judged by the Investigator, including medical or clinical conditions, or participants potentially at risk of noncompliance to study procedures. The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.
Where it's running
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Investigational Site Number: 1560001
Shanghai, China Recruiting
Study contacts
- Study coordinator: Trial Transparency email recommended (Toll free for US & Canada)
- Email: contact-us@sanofi.com
- Phone: 800-633-1610
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Global registry for tracking Pompe disease outcomes
This study is tracking the health and progress of people with Pompe disease to learn more about how it affects them and to see how well treatments are working.
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Pompe disease long-term monitoring with avalglucosidase alfa
This is an observational program to see how people with Pompe disease who started avalglucosidase alfa fare over time, including biomarkers, muscle and breathing function, and safety.
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Phrenic nerve and diaphragm testing in Pompe disease
This study tests phrenic nerve conduction and diaphragm activity in adults with Pompe disease to explore respiratory motor-unit involvement.
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S-606001 added to enzyme replacement therapy for adults with late-onset Pompe disease
This trial tests whether adding S-606001 to ongoing enzyme replacement therapy is safe and can improve walking distance and breathing in adults with late-onset Pompe disease.
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Global registry for patients with Pompe disease
This study is collecting information from people with Pompe disease to see how well current treatments work and how they affect daily life, including both those who are being treated and those who aren't.
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Safety study of avalglucosidase alfa during pregnancy
This study is looking at how safe the drug avalglucosidase alfa is for pregnant women and their babies during pregnancy and breastfeeding.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.