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Desperate pompe patients get early access to experimental drug combo

NCT ID NCT03865836

Disease control Sponsor: Amicus Therapeutics Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access This study
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This expanded access program provides ATB200/AT2221 to people with Pompe disease who cannot join ongoing clinical trials or choose not to use standard therapy. The treatment combines an enzyme replacement therapy with a chaperone drug to help break down glycogen buildup. Participants must have a confirmed diagnosis and agree to share their health data.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
ATB200 (enzyme replacement therapy) and AT2221 (chaperone drug)
What this could lead to
If this treatment works, it could offer a new option for managing Pompe disease, potentially improving muscle function and survival.
What could go wrong
This is an early access program, not a formal trial, so effectiveness and safety are still being studied. Benefits are uncertain, and there may be unknown side effects.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Anyone

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Subject must have a diagnosis of Pompe disease based on documentation of one of the following: 1. deficiency of GAA enzyme 2. GAA genotyping 2. Patient does not currently qualify for an Amicus sponsored on-going clinical trial or is declining on currently approved ERT (e.g. Myozyme) 3. The patient must be willing to receive treatment with ATB200/AT2221 via this program, which includes signing an authorization form for sharing clinical data with Amicus Therapeutics, and its agent Early Access Care LLC. Exclusion Criteria: 1. Patient, whether male or female, is planning to conceive a child during the treatment program. 2. Patient has a hypersensitivity to any of the excipients in ATB200, alglucosidase alfa, or AT2221 3. Patient has a medical or any other extenuating condition or circumstance that may, in the opinion of the investigator, pose an undue safety risk to the subject or compromise his/her ability to comply with or adversely impact protocol requirements. 4. Patient has received any gene therapy at any time. 5. Concomitant use of miglitol (eg, Glyset), non-AT2221 form of miglustat (eg, Zavesca), acarbose (eg, Precose or Glucobay), voglibose (eg, Volix, Vocarb, or Volibo)

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Conditions

The condition(s) this trial relates to.

glycogen storage disease II Glycogen Storage Disease Type II

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Pompe disease

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Study contacts

  • Contact

    Email: •••••@•••••

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