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AB-1005

Phase 2

Parkinson Disease | Small molecule | Neurology |Bayer AG|Trials Updated: Jul 29, 2026

AB-1005 development status

Highest phase Phase 2
Registered trials 1 across 1 sponsor since May 2026

AB-1005 target and mechanism

ModalitySmall molecule

Also known as AAV2-GDNF gene therapy

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindSHAM_CONTROLLEDDMC
Total Trials2
Total Enrollment135

FDA Designations

No designations recorded

AB-1005 clinical trials

AB-1005 · 2 trials · 1 indication

Phase 2 2
NCT07566429A Study of AB-1005 Gene Therapy in Japanese Adults With Moderate Parkinson's Disease (J-REGENERATE-PD)Parkinson Disease
NOT YET_RECRUITING8 Analytics
NCT06285643A Study of AAV2-GDNF in Adults With Moderate Parkinson's Disease (REGENERATE-PD)Parkinson Disease
RECRUITING127 Analytics
PHASE2NOT YET_RECRUITING
A Study of AB-1005 Gene Therapy in Japanese Adults With Moderate Parkinson's Disease (J-REGENERATE-PD)
Parkinson DiseaseUnlock trial analytics
PHASE2RECRUITING
A Study of AAV2-GDNF in Adults With Moderate Parkinson's Disease (REGENERATE-PD)
Parkinson DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence of adverse events up to Month 18 after study intervention
Up to 18 months

Number and proportion of participants with at least one adverse event

Change from Baseline to Month 18 in normalized Good ON time measured with PD Motor Diary
Up to 18 months
Change from baseline to Month 18 on PD Motor Diary
18 months

Normalized Good ON time per Hauser Diary

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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
AB-1005 infusionEXPERIMENTAL -
AAV2-GDNFEXPERIMENTAL -
Control SurgerySHAM_COMPARATOR -

Interventions

NameTypeDescription
AB-1005DRUGBilateral image-guided infusion of AAV2-GDNF into putamen, single dose
AAV2-GDNF gene therapyDRUGBilateral image-guided infusion of AAV2-GDNF into putamen, single dose
control surgeryPROCEDUREBilateral partial burr/twist holes without dural penetration
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Eligibility Criteria

Age Range45 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites6

Inclusion Criteria: * Male and female adults 45-75 years of age inclusive, at the time of signing of informed consent * Diagnosed with Parkinson's disease in the past 4-10 years (inclusive) and currently meeting all the following criteria: 1. Presence of bradykinesia PLUS any of the following: r...

Countries:JapanUnited StatesGermanyPolandUnited Kingdom
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Recent Changes (Last 90 Days)

MEDIUMJul 29, 2026NCT07566429primaryCompletionDate: changed
MEDIUMJul 29, 2026NCT07566429primaryCompletionDate: changed

Frequently asked questions about AB-1005

What is AB-1005?

AB-1005 is an investigational gene therapy being developed for Parkinson disease. It is also known as AAV2-GDNF gene therapy. It is currently in Phase 2 clinical development and is being studied in adults with moderate Parkinson disease. It has not been approved by any regulatory agency.

What is AB-1005 used for in Parkinson disease?

AB-1005 is being studied as a treatment for moderate Parkinson disease in adults aged 45 years and older. The Phase 2 program is evaluating it in patients with moderate disease. It is investigational and has not been approved for any indication.

Who is developing AB-1005?

AB-1005 is being developed by Bayer AG, which trades under the ticker BAYRY. Bayer is running the Phase 2 clinical program for the gene therapy in Parkinson disease across multiple countries.

What phase is AB-1005 in?

AB-1005 is in Phase 2 clinical development. Two Phase 2 trials are active, and no trials have been completed. The program has enrolled a total of 135 planned participants across the two studies. AB-1005 is investigational and has not received regulatory approval.

What clinical trials is AB-1005 in?

AB-1005 is being tested in two Phase 2 trials. NCT06285643, also called REGENERATE-PD, is recruiting 127 adults with moderate Parkinson disease in the United States, Germany, Poland, and the United Kingdom. NCT07566429, called J-REGENERATE-PD, is not yet recruiting 8 adults in Japan.

Is AB-1005 the same as AAV2-GDNF gene therapy?

Yes, AB-1005 is also known as AAV2-GDNF gene therapy. Both names refer to the same investigational product being developed by Bayer AG for moderate Parkinson disease in Phase 2 trials. Searches for either name point to the same clinical program.