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AB-1009

Phase 1

Pompe Disease (Late-onset) | Gene therapy | Rare Disease |Bayer AG|Last Updated: Jul 20, 2026

Target and mechanism

ModalityGene therapy

Also known as AB-1009 (GAA Gene)

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment12

FDA Designations

No designations recorded

Clinical trial landscape

AB-1009 · 1 trial · 3 indications

Phase 1 1
NCT07282847A Study to Evaluate Safety, Tolerability, and Efficacy of AB-1009 Gene Therapy (GAA Gene) in Adult Participants With Late-Onset Pompe Disease (PROGRESS-GT LOPD)Pompe Disease (Late-onset)
RECRUITING12 Analytics
PHASE1RECRUITING
A Study to Evaluate Safety, Tolerability, and Efficacy of AB-1009 Gene Therapy (GAA Gene) in Adult Participants With Late-Onset Pompe Disease (PROGRESS-GT LOPD)
Pompe Disease (Late-onset)Unlock trial analytics

Study Endpoints

Primary Endpoints

Incidence and severity of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs) during the primary observation period
Day 1 (Dosing) through Week 52 (the end of the primary observation period)

Secondary Endpoints

Area under the curve (AUC) of GAA activity in serum
Baseline through Week 52
Viral shedding (whole blood, saliva, urine)
Day 1 through Week 24 (or until 3 consecutive data points are at or below the limit of detection)
AUC of urinary Glc4
Baseline during the primary observation period (through Week 52)
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort 1EXPERIMENTAL1.0E13 vg/kg
Cohort 2EXPERIMENTAL1.5E13 vg/kg

Interventions

NameTypeDescription
AB-1009 (GAA Gene)GENETICA single intravenous infusion of AB-1009
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersNo
Study Sites9

Inclusion Criteria: 1. Participant must be ≥18 to ≤65 years of age at the time of signing the informed consent form. 2. Confirmed GAA enzyme deficiency from any tissue source and/or confirmed biallelic GAA gene mutations. 3. Undergone enzyme replacement treatment (ERT) (either alglucosidase alfa (L...

Countries:United States
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Frequently asked questions about AB-1009

What is AB-1009 used for?

AB-1009 is an investigational gene therapy being developed for late-onset Pompe disease (LOPD), a rare inherited disorder. It is designed to deliver the GAA gene to address the underlying enzyme deficiency. The drug is currently in Phase 1 clinical development and has not been approved by regulatory authorities.

How does AB-1009 work?

AB-1009 is a gene therapy that delivers the GAA gene, which encodes the enzyme acid alpha-glucosidase. In late-onset Pompe disease, mutations in this gene lead to enzyme deficiency and glycogen accumulation. By introducing a functional GAA gene, AB-1009 aims to restore enzyme activity and reduce disease pathology.

Who is developing AB-1009?

AB-1009 is being developed by Bayer AG, a multinational pharmaceutical company. Bayer's stock is traded over-the-counter under the ticker BAYRY. The company is conducting clinical trials to evaluate the safety, tolerability, and efficacy of this gene therapy in patients with late-onset Pompe disease.

What phase is AB-1009 in?

AB-1009 is in Phase 1 clinical development. It is an investigational drug, meaning it has not yet been approved by regulatory agencies. The ongoing Phase 1 trial is recruiting participants to assess the safety, tolerability, and efficacy of the therapy in adults with late-onset Pompe disease.

What clinical trials is AB-1009 in?

AB-1009 is being studied in a Phase 1 clinical trial registered as NCT07282847, titled "A Study to Evaluate Safety, Tolerability, and Efficacy of AB-1009 Gene Therapy (GAA Gene) in Adult Participants With Late-Onset Pompe Disease (PROGRESS-GT LOPD)." The trial is recruiting 12 participants in the United States and is currently active.

Is AB-1009 the same as AB-1009 (GAA Gene)?

Yes, AB-1009 is also referred to as AB-1009 (GAA Gene). The alternative name highlights that the therapy involves the GAA gene, which is central to its mechanism of action. Both names refer to the same investigational gene therapy for late-onset Pompe disease.