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AB-1009

Phase 1

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

AB-1009 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

CONTROLLEDDMC
Total Trials1
Total Enrollment12

FDA Designations

No designations recorded

AB-1009 clinical trials

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 in late-onset Pompe disease?

AB-1009 is an investigational gene therapy being developed for adults with late-onset Pompe disease, a rare inherited disorder. It is designed as a one-time treatment approach and is currently being studied in a Phase 1 clinical trial in the United States. It is not approved for any use.

Who is developing AB-1009?

AB-1009 is being developed by Bayer AG, which trades on the OTC market under the ticker BAYRY. Bayer is the sponsor of the ongoing Phase 1 clinical program evaluating the therapy in adult patients with late-onset Pompe disease.

What phase is AB-1009 in?

AB-1009 is in Phase 1 clinical development. The single ongoing trial is currently recruiting adult participants with late-onset Pompe disease. No Phase 2 or Phase 3 studies have been initiated, and the therapy remains investigational.

What clinical trial is AB-1009 in?

AB-1009 is being evaluated in the PROGRESS-GT LOPD trial, registered as NCT07282847. The Phase 1 study is recruiting 12 adult participants with late-onset Pompe disease at sites in the United States. It is a controlled trial without randomization or double blinding.

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

Yes, AB-1009 (GAA Gene) refers to the same investigational therapy as AB-1009. The parenthetical describes the gene delivered by the therapy. Both names refer to the Bayer AG gene therapy candidate being studied in late-onset Pompe disease.

What does AB-1009 target?

AB-1009 is a gene therapy that delivers the GAA gene, which encodes acid alpha-glucosidase. In late-onset Pompe disease, mutations in this gene lead to enzyme deficiency. The therapy aims to provide a functional copy of GAA to address the underlying cause of the disease.