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A Phase 2 Study and Open-Label Extension of NEU-411 in Companion Diagnostic-Positive Participants With Early Parkinson's Disease

A Phase 2, Randomized, Double-Blind, Placebo-Controlled Study and Open-Label Extension to Evaluate the Safety and Efficacy of NEU-411 in Companion Diagnostic-Positive Participants With Early Parkinson's Disease (NEULARK)

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06680830
Acronym
NEULARK
Enrollment
150
Registered
2024-11-08
Start date
2025-01-17
Completion date
2028-06-01
Last updated
2026-08-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Early Parkinson Disease (Early PD), Idiopathic Parkinson Disease, Parkinson, Parkinson Disease, Parkinson Disease, Idiopathic

Keywords

Early PD, Parkinsons, Parkinsons Disease, Idiopathic Parkinsons Disease, leucine-rich repeat kinase 2, PD, NEULARK, LRRK2, PARK8, de novo Parkinsons disease, Parkinson's disease

Brief summary

The goal of this Phase 2 clinical trial is to investigate the efficacy and safety of NEU-411 in men and women aged 40-80 years with early Parkinson's Disease (PD) who have predicted elevations in the activity of the "leucine-rich repeat kinase 2" ("LRRK2" for short) pathway based on their genetic profile. A DNA test will be used to identify the "LRRK2-driven" population with predicted elevation in the LRRK2 pathway.

Detailed description

NEU-411-PD201 is a Phase 2, randomized, placebo-controlled, proof-of-concept study and open-label extension (OLE) in participants with early Parkinson's Disease (PD) who have LRRK2-driven PD as measured by an investigational companion diagnostic genetic test (CDx). The study will evaluate the efficacy, safety, pharmacokinetics, and pharmacodynamics of NEU-411, an orally-administered, potent, selective, bioavailable, highly permeable, brain penetrant, small molecule inhibitor of LRRK2 activity as compared to placebo. After participants are screened for inclusion in the randomized, placebo-controlled portion of the study, approximately 150 participants will be randomized in a 1:1 allocation to NEU-411 30 mg once per day or placebo for a 52-week treatment period with a safety follow-up visit within 2 weeks after the last treatment visit. Eligible participants may enroll in the OLE and receive treatment for an additional 26 weeks.

Interventions

NEU-411, a potent, selective, orally bioavailable, highly permeable, brain penetrant, small molecule inhibitor of LRRK2 activity

OTHERPlacebo

Orally-administered matched placebo

Sponsors

Neuron23 Inc.
Lead SponsorINDUSTRY
Qiagen Manchester Limited
CollaboratorUNKNOWN
Roche Diagnostic Ltd.
CollaboratorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Masking description

The Sponsor is also masked.

Eligibility

Sex/Gender
ALL
Age
40 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

1. Aged 40-80 years at time of screening, inclusive 2. Diagnosis of clinically established or clinically probable Parkinson's Disease (PD) 3. LRRK2-driven PD using the investigational companion diagnostic genetic test (CDx) 4. Modified Hoehn and Yahr (mH\&Y) of 1 to 2.5

Exclusion criteria

1. Secondary or atypical parkinsonian syndromes 2. Uncontrolled diabetes mellitus with hemoglobin A1c (HbA1c) \>8% 3. Other significant medical conditions (as determined by medical history, examination, or clinical investigations at screening) Additional inclusion and

Design outcomes

Primary

MeasureTime frame
Change from baseline in the Roche digital biomarker score using the Roche Parkinson's Disease application (v3.0) compared to placeboFrom enrollment to the end of treatment at 52 weeks
Incidence of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs) compared to placeboFrom enrollment to the end of study at 54 weeks

Secondary

MeasureTime frameDescription
Movement Disorder Society's Unified Parkinson's Disease Rating Scale (MDS-UPDRS)52 weeksChange from baseline to Week 52 in motor function/nonmotor as measured by Movement Disorder Society's Unified Parkinson's Disease Rating Scale (MDS-UPDRS)

Countries

Israel, Italy, Poland, Spain, United Kingdom, United States

Contacts

CONTACTFatta B Nahab, MD, FAAN, FANA
clinicaltrials@neuron23.com650-228-2527
PRINCIPAL_INVESTIGATORFatta B Nahab, MD, FAAN FANA

Neuron23 Inc.

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 29, 2026