Parkinson DiseasePhase 2NEULARKNCT06680830
A Phase 2 Study and Open-Label Extension of NEU-411 in Companion Diagnostic-Positive Participants With Early Parkinson's Disease
A Phase 2 study testing NEU-411 in people with Parkinson Disease and Parkinson, run by Neuron23 Inc. at 72 sites in 6 countries.
Trial 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. Read more about this study
- Who is it for?
- Ages 40 to 80 years
- Conditions the study is for
- Parkinson Disease, Parkinson, Idiopathic Parkinson Disease
- What is being tested?
- NEU-411
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 150 participants
- Where
- 72 sitesin 6 countries
- Study dates
- 17 Jan 2025to Jun 2028
- Phase
- Phase 2
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 40 to 80 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Aged 40-80 years at time of screening, inclusive
- Diagnosis of clinically established or clinically probable Parkinson's Disease (PD)
- LRRK2-driven PD using the investigational companion diagnostic genetic test (CDx)
- Modified Hoehn and Yahr (mH\&Y) of 1 to 2.5
Who cannot join
- Secondary or atypical parkinsonian syndromes
- Uncontrolled diabetes mellitus with hemoglobin A1c (HbA1c) >8%
- Other significant medical conditions (as determined by medical history, examination, or clinical investigations at screening)
- Additional inclusion and exclusion criteria for the RCP and OLE are outlined in the full study protocol.
Trial locations and contacts
72 sites in 6 countries. Contact the study team or a site near you to ask about taking part.
72 sites in 6 countries
United States45 sites, 44 recruiting
- Recruiting
University of New Mexico
Albuquerque, New Mexico, 87106
Anna Tingin, 505-272-3342, atingin@salud.unm.edu
Sarah P Richardson, MD, FAAN
- Recruiting
Emory University
Atlanta, Georgia, 30329
Brian Sperin, brian.a.sperin@emory.edu
Stewart Factor, DO
- Recruiting
Augusta University
Augusta, Georgia, 30912
Buff Farrow, 706-721-0619, BFARROW@augusta.edu
John Morgan, MD, PhD
- Recruiting
University of Colorado - Anschutz Medical Campus
Aurora, Colorado, 80045
Emily Forbes, DO, 303-724-4644, Neuroresearch@cuanschutz.edu
Emily Forbes, DO
- Recruiting
University of Maryland
Baltimore, Maryland, 21201
Victoria Davis, 410-328-4526, vdavis@som.umaryland.edu
Joseph Savitt, MD, PhD
- Recruiting
Parkinson's Disease and Movement Disorders Center of Boca Raton
Boca Raton, Florida, 33486
Karla Arias, 561-392-1818 ext. 2, karias@parkinsonscenter.org
Stuart Isaacson, MD, FAAN
- Recruiting
Beth Israel Deaconess Medical Center
Boston, Massachusetts, 02215
Alexandra Gottlieb, 617-667-9890, agottli2@bidmc.harvard.edu
Ludy Shih, MD, MMSc
- Recruiting
University of North Carolina - Chapel Hill
Chapel Hill, North Carolina, 27599
Jessica Ferrall, 919-962-8852, jferrall@neurology.unc.edu
Daniel Roque, MD
- Recruiting
Medical University of South Carolina
Charleston, South Carolina, 29425
Robin Bulgarino, 843-792-1115, Bulgarino@musc.edu
Christine Cooper, MD
- Recruiting
University of Virginia
Charlottesville, Virginia, 22903
Lauren Miller, 434-982-6599, FDK5DN@UVAHealth.org
Binit Shah, MD, FAAN
- Recruiting
Northwestern Medical Group, Department of Neurology
Chicago, Illinois, 60611
Camryn Butze, 312-503-6824, camryn.butze@northwestern.edu
Danielle N Larson, MD
- Recruiting
The Ohio State University
Columbus, Ohio, 43210
Katherine Ambrogi, 614-688-6685, katherine.ambrogi@osumc.edu
Ariane Park, MD, MPH
- Recruiting
Neurology Consultants of Dallas PA
Dallas, Texas, 75243
Maya Manjane, 214-750-9977 ext. 293, maya.manjane@carumresearch.com
Nirav Pavasia, MD
- Recruiting
Quest Research Institute
Farmington Hills, Michigan, 48334
Nancy Virdi, 248-957-8944 ext. 1103, Nancy.Virdi@alcanzaclinical.com
Aaron Ellenbogen, DO, MPH
- Recruiting
Neuro-Pain Medical Center
Fresno, California, 93710
Mirian Payo, 559-437-9700 ext. 305, mirianp@neuropain.com
Perminder Bhatia, MD
- Recruiting
University of Florida
Gainesville, Florida, 32608
Camille Swartz, 352-733-2429, cami.swartz@neurology.ufl.edu
Irene Malaty, MD
- Recruiting
Struthers Parkinson Center
Golden Valley, Minnesota, 55427
Carrie Weaver, 952-993-5903, carrie.a.weaver@healthpartners.com
Sotirios Parashos, MD, PhD
- Recruiting
Baylor College of Medicine
Houston, Texas, 77030
Aneesch Martin, 713-798-2606, aneesch.martin@bcm.edu
Arjun Tarakad, MD
- Recruiting
The University of Texas Health Science Center at Houston
Houston, Texas, 77030
Brittany Duncan, 713-486-3134, Brittany.J.Duncan@uth.tmc.edu
Raja Mehanna, MD
- Recruiting
University of California, Irvine
Irvine, California, 92697
Rene Anguiano, 949-824-6407, renea1@hs.uci.edu
Sanaz Attaripour Isfahani, MD
- Recruiting
University of Kansas Medical Center
Kansas City, Kansas, 66160
Emily Jackson, 913-588-0859, ejackson9@kumc.edu
Rajesh Pahwa, MD
- Recruiting
EvergreenHealth
Kirkland, Washington, 98034
Ryuma Barnes, 425-899-5370, robarnes@evergreenhealthcare.org
Pinky Agarwal, MD, FAAN
- Recruiting
Cleveland Clinic
Las Vegas, Nevada, 89106
Liliana Dumitrescu, 702-483-6000, DUMITRL@ccf.org
Zoltan Mari, MD
- Recruiting
University of Kentucky
Lexington, Kentucky, 40536
Corisa Logan, 859-218-5076, corisa.logan@uky.edu
John Slevin, MD, MBA
- Recruiting
University of Arkansas
Little Rock, Arkansas, 72205
Erin Hatcher, 501-214-2178, EHatcher@uams.edu
Rohit Dhall, MD
- Recruiting
University of California, Los Angeles
Los Angeles, California, 90095
Diane Yang, 310-206-3356, DDYang@mednet.ucla.edu
Jeff Bronstein, MD, PhD
- Recruiting
Northwell Health
Manhasset, New York, 11030
Nicholas Zumba, 516-472-5807, Neuroscienceresearch@northwell.edu
Ritesh Ramdhani, MD
- Recruiting
Medical College of Wisconsin
Milwaukee, Wisconsin, 53226
Shelby Schold, 414-955-0698, sschold@mcw.edu
Karen Blindauer, MD
- Completed
Esperanza Clinical
Murrieta, California, 92562
- Recruiting
Vanderbilt University
Nashville, Tennessee, 37232
Haley Kling, 615-208-3974, haley.kling@vumc.org
David Charles, MD
- Recruiting
Ochsner Clinic Foundation
New Orleans, Louisiana, 70121
Anna Leonard-Leumas, 504-842-0148, anna.leonardleumas@ochsner.org
David Houghton, MD
- Recruiting
Icahn School of Medicine at Mount Sinai/Mount Sinai West
New York, New York, 10019
Ricardo Renvill, 212-844-6055, ricardo.revill@mountsinai.org
Joohi Jimenez-Shahed, MD
- Recruiting
Columbia University
New York, New York, 10032
Columbia Movement Disorders Research, 347-882-4315, mdresearch@cumc.columbia.edu
Sheng-Han Kuo, MD
- Recruiting
Neurology One
Orlando, Florida, 32825
Carem Acosta, 407-674-1648, cacosta@neurologyone.com
Ramon L Rodriguez, MD, FAAN
- Recruiting
Parkinson's Research Centers of America - Palo Alto
Palo Alto, California, 94301
Leeana Bade, 650-394-6690, Lbade@Parkinsonscenter.org
Salima Brillman, MD
- Recruiting
Thomas Jefferson University Hospital
Philadelphia, Pennsylvania, 19107
Brian Urbani, 215-955-2635, Brian.Urbani@jefferson.edu
Tsao-Wei Liang, MD
- Recruiting
Oregon Health & Science University (OHSU)
Portland, Oregon, 97239
Emily Leonard, 503-367-4719, leonarde@ohsu.edu
Joseph Quinn, MD
- Recruiting
University of Rochester
Rochester, New York, 14618
Amy Chesire, 585-341-7500, Amy_Chesire@URMC.Rochester.edu
Christopher Tarolli, MD
- Recruiting
Central Texas Neurology Consultants
Round Rock, Texas, 78681
Koni Lopez, 512-218-1222 ext. 214, k.lopez@ctncpa.org
Elizabeth Peckham, DO
- Recruiting
Sutter Neuroscience Institute
Sacramento, California, 95816
Sampreet Moneski, 916-887-4736, sampreet.moneski@sutterhealth.org
Nicklesh Thakur, DO
- Recruiting
University of Utah Movement Division
Salt Lake City, Utah, 84108
Kendra Fowler, 801-581-7828, kendra.fowler@utah.edu
Paolo Moretti, MD
- Recruiting
Inland Northwest Research
Spokane, Washington, 99202
Michael Dauer, 509-960-2818 ext. 6, mdauer@inwresearch.com
Jason Aldred, MD
- Recruiting
Banner Sun Health Research Institute
Sun City, Arizona, 85351
Serena Lowery, 623-832-0080, Serena.Lowery@Bannerhealth.com
David Shprecher, DO
- Recruiting
USF Parkinson's & Movement Disorders Clinic
Tampa, Florida, 33613
Erica Botting, 813-974-8026, ericabotting@usf.edu
Robert Hauser, MD, MBA, FAAN
- Recruiting
The Movement Disorder Clinic of Oklahoma
Tulsa, Oklahoma, 74136
Elise Gibson, 918-392-4530, mdcclinicaltrials@gmail.com
Kevin Klos, MD
Spain7 sites, 7 recruiting
- Recruiting
Instituto de Investigacion Sanitaria Biocruces Bizkaia - Hospital Universitario Cruces
Barakaldo, 49003
Naiara Azcue, +34 944881576, azkue.naiara@gmail.com
Juan Carlos Gomez Esteban, MD, PhD
- Recruiting
Hospital Universitari Vall d'Hebron
Barcelona, 08035
Jorge Hernandez Vara, MD, +34 934893000 ext. 4884, jorge.hernandez@vallhebron.cat
Jorge Hernandez Vara, MD
- Recruiting
Hospital Clinic de Barcelona (Hospital Clinic i Provincial) - Barnaclinic S.A.
Barcelona, 08036
Alicia Garrido, Pla, +34 932275785, agarridop@clinic.cat
Alicia Garrido, Pla
- Recruiting
Universidad Autonoma de Madrid (UAM) - Hospital Universitario de La Princesa
Madrid, 28006
Lydia Lopez Manzanares, +34 915202405, lydia.lopez@salud.madrid.org
Lydia Lopez Manzanares, MD
- Recruiting
Hospital Universitario HM Puerta del Sur
Móstoles, 28938
Patricia Vicente, +34 912673100 ext. 7988, pvicentefernandez@hmhospitales.com
Michele Matarazzo, MD
- Recruiting
Policlinica Gipuzkoa - Centro de Investigacion Parkinson (CIP)
San Sebastián, Donostia, 20014
Gurutz Linazasoro, MD, +34 943002812, glinazasoro@vivebiotech.com
Gurutz Linazasoro, MD
- Recruiting
Hospital Universitario Virgen del Rocio (HUVR) - Instituto de Biomedicina de Sevilla (IBIS)
Seville, 41013
Pablo Mir, MD, +34 955923039, pmir@us.es
Pablo Mir, MD
Italy6 sites, 6 recruiting
- Recruiting
IRCCS Ospedale San Raffaele (HSR) - Dipartimento Di Neurologia
Milan, 20132
Daniela Capilupo, +39 0226434815, capilupo.daniela@hsr.it
Massimo Filippi, MD, Prof
- Recruiting
Universita Degli Studi Della Campania "Luigi Vanvitelli" - Azienda Ospedaliera Universitaria
Naples, 80138
Teresa Del Santo, +39 3494026479, delsantoteresa@gmail.com
Alessandro Tessitore, MD, PhD
- Recruiting
Universita Degli Studi Di Padova - Azienda Ospedaliera Di Padova - Clinica Neurologica
Padua, 35128
Angelo Antonini, +39 0498213607, angelo.antonini.pd@gmail.com
Angelo Antonini, MD, PhD, Prof
- Recruiting
Azienda Ospedaliero Universitaria Pisana - Stabilimento Ospedaliero Di Santa Chiara
Pisa, 56126
Pierangela Riani, +39 050992567, p.riani@ao-pisa.toscana.it
Roberta Ceravolo, MD, Prof
- Recruiting
Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) - San Raffaele Pisana
Rome, 00166
Miriam Casali, +39 0652252311, miriam.casali@sanraffaele.it
Fabrizio Stocchi, MD, PhD
- Recruiting
Fondazione Policilinico Universitario A Gemelli IRCCS
Rome, 00168
Flavia Torlizzi, +39 0630155633, flavia.torlizzi@policlinicogemelli.it
Anna Rita Bentivoglio, MD, PhD
United Kingdom6 sites, 6 recruiting
- Recruiting
Ninewells Hospital and Medical School - NHS Tayside
Dundee, Scotland, DD19SY
Justine Hudson, +44 1382423086, justine.hudson2@nhs.scot
Esther Sammler, MD
- Not yet recruiting
London North West University Healthcare NHS Trust - Northwick Park Hospital
Harrow, HA1 3UJ
Tabish Saifee, MBBS, FRCP, PhD, +44 020 3448 4252, LNWH-tr.Research@nhs.net
Tabish Saifee, MBBS, FRCP, PhD
- Recruiting
St George's Hospital, University of London
London, England, SW17 0QT
Francesca Morgante, MD, +44 20 8725 5403, fmorgant@sgul.ac.uk
Francesca Morgante, MD
- Recruiting
University College London Hospitals NHS Foundation Trust
London, England, WC1N 3BG
Olivia Burton, +44 20 3448 4531, olivia.burton7@NHS.net
Huw Morris, MD, PhD
- Not yet recruiting
Panthera Enfield
London, EN3 4GS
Karen Faulkner, +44 785 020 8085, karen.faulkner@panthera-bio.com
Viquar Chamoun, MD
- Recruiting
Clinical Aging Research Unit, Newcastle University
Newcastle upon Tyne, England, NE4 5PL
Nicola Pavese, MD, PhD, FRCP, FEAN, +44 0191 2081264, nicola.pavese@ncl.ac.uk
Nicola Pavese, MD, PhD, FRCP, FEAN
Israel4 sites, 4 recruiting
- Recruiting
Rambam Medical Center
Haifa, 3109601
Ilana Schlesinger, MD, Prof, 972-4-7771495, i_schles@rmc.gov.il
Ilana Schlesinger, MD, Prof
- Recruiting
Shaare Zedek Medical Center
Jerusalem, 9103102
Yael Mimoun, 972-5-43184600, yaelmi@szmc.org.il
Gilad Yahalom, MD, Prof
- Recruiting
Sheba Medical Center
Ramat Gan, 5262000
Adi Saar, 972-3-5304931, adi.saar@sheba.health.gov.il
Sharon Hassin, MD, Prof
- Recruiting
Tel Aviv Medical Center
Tel Aviv, 6423906
Adi Ezra, 972-3-6974912, adil@tlvmc.gov.il
Tanya Gurevich, MD, Prof
Poland4 sites, 4 recruiting
- Recruiting
Centrum Medyczne Neuromed
Bydgoszcz, 85-163
Beata Lisewska, +48 696268565, lisewskabeata@gmail.com
Pawel Lisewski, MD
- Recruiting
NZOZ Wielospecjalistyczna Poradnia Lekarska Synapsis Lech Szczechowski
Katowice, 32-600
Katarzyna Smilowska, +48 600282870, kasia.smilowska@gmail.com
Katarzyna Smilowska, MD, PhD
- Recruiting
Pro Life Medica Sp. z o. o. ETA Lublin
Lublin, 20-412
Dominika Tomaka, MD, +48 691485946, d.tomaka@etg-network.org
Dominika Tomaka, MD
- Recruiting
Insula Badania Sp. Z o.o.
Warsaw, 02-699
Marta Jethon, +48 501035250, jethon2@tlen.pl
Marta Jethon, MD
About this study
Official title: 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)
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.
Read the 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.
- Conditions
- Parkinson Disease, Parkinson, Idiopathic Parkinson Disease, Early Parkinson Disease (Early PD), Parkinson Disease, Idiopathic
- Being tested
- NEU-411, Placebo
- 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
- Medical subject headings
- Parkinson Disease
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
NEU-411Drug
NEU-411, a potent, selective, orally bioavailable, highly permeable, brain penetrant, small molecule inhibitor of LRRK2 activity
PlaceboOther
Orally-administered matched placebo
| Study group | Role | What they receive |
|---|---|---|
| NEU-411 | Experimental | Orally-administered NEU-411 Receives: Drug: NEU-411 |
| Placebo | Placebo comparator | Orally-administered matching placebo Receives: Other: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change from baseline in the Roche digital biomarker score using the Roche Parkinson's Disease application (v3.0) compared to placebo
Measured: From enrollment to the end of treatment at 52 weeks
Incidence of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs) compared to placebo
Measured: From enrollment to the end of study at 54 weeks
Secondary outcomes (1)
Movement Disorder Society's Unified Parkinson's Disease Rating Scale (MDS-UPDRS)
Change from baseline to Week 52 in motor function/nonmotor as measured by Movement Disorder Society's Unified Parkinson's Disease Rating Scale (MDS-UPDRS)
Measured: 52 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Nov 2024
- Study start17 Jan 2025
- Primary completionDec 2027 (estimated)
- Study completionJun 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Parkinson DiseaseStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 150 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Neuron23 Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Collaborators
- Qiagen Manchester Limited, Roche Diagnostic Ltd.
- Responsible party
- Sponsor
- Investigators
- Fatta B Nahab, MD, FAAN FANA, Principal investigator, Neuron23 Inc.
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06680830
- Sponsor's protocol ID
- NEU-411-PD201
- Acronym
- NEULARK
- Status last verified
- Aug 2026
- First submitted
- 5 Nov 2024
- Last updated
- 2 Oct 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 2 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- 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)
- ClinicalTrials.gov ID
- NCT06680830
- Acronym / sponsor ID
- NEULARK / NEU-411-PD201
- Conditions
- Parkinson Disease, Parkinson, Idiopathic Parkinson Disease, Early Parkinson Disease (Early PD), Parkinson Disease, Idiopathic
- Keywords
- Early PD, Parkinsons, Parkinsons Disease, Idiopathic Parkinsons Disease, leucine-rich repeat kinase 2, PD, NEULARK, LRRK2
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 150 participants (estimated)
- Lead sponsor
- Neuron23 Inc.Industry (pharma, biotech, devices)
- Collaborators
- Qiagen Manchester Limited, Roche Diagnostic Ltd.
- Study start
- 17 Jan 2025 (actual)
- Primary completion
- Dec 2027 (estimated)
- Study completion
- Jun 2028 (estimated)
- First posted
- 8 Nov 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| NEU-411 | Experimental | Drug: NEU-411Orally-administered NEU-411 |
| Placebo | Placebo comparator | Other: PlaceboOrally-administered matching placebo |
Who may qualify
- Ages
- 40 to 80 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Aged 40-80 years at time of screening, inclusive
- Diagnosis of clinically established or clinically probable Parkinson's Disease (PD)
- LRRK2-driven PD using the investigational companion diagnostic genetic test (CDx)
- Modified Hoehn and Yahr (mH\&Y) of 1 to 2.5
Key exclusion criteria (4 listed)
- Secondary or atypical parkinsonian syndromes
- Uncontrolled diabetes mellitus with hemoglobin A1c (HbA1c) >8%
- Other significant medical conditions (as determined by medical history, examination, or clinical investigations at screening)
- Additional inclusion and exclusion criteria for the RCP and OLE are outlined in the full study protocol.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| NEU-411NEU-411, a potent, selective, orally bioavailable, highly permeable, brain penetrant, small molecule inhibitor of LRRK2 activity | Drug | NEU-411 |
| PlaceboOrally-administered matched placebo | Other | Placebo |
Primary outcome
Change from baseline in the Roche digital biomarker score using the Roche Parkinson's Disease application (v3.0) compared to placebo
Time frame: From enrollment to the end of treatment at 52 weeks
Incidence of treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs) compared to placebo
Time frame: From enrollment to the end of study at 54 weeks
1 secondary outcome
Movement Disorder Society's Unified Parkinson's Disease Rating Scale (MDS-UPDRS)
Time frame: 52 weeks
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Oct 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Fatta B Nahab, MD, FAAN FANA principal investigator
Neuron23 Inc.
72 sites in 6 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing NEU-411 in people with Parkinson Disease and Parkinson, run by Neuron23 Inc. at 72 sites in 6 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 2 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 72 sites in United States, Spain, Italy, United Kingdom, Israel and 1 more country. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Fatta B Nahab, MD, FAAN, FANA (650-228-2527, clinicaltrials@neuron23.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change from baseline in the Roche digital biomarker score using the Roche Parkinson's Disease application (v3.0) compared to placebo (time frame: From enrollment to the end of treatment at 52 weeks). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Oct 2026.