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RO7046015

Phase 2

Parkinson's Disease | Small molecule | Neurology |Prothena Corporation plc|Last Updated: Jul 13, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment316

FDA Designations

No designations recorded

Clinical trial landscape

RO7046015 · 1 trial · 1 indication

Phase 2 1
NCT03100149A Study to Evaluate the Efficacy of Prasinezumab (RO7046015/PRX002) in Participants With Early Parkinson's DiseaseParkinson's Disease
ACTIVE NOT_RECRUITING316 Analytics
PHASE2ACTIVE NOT_RECRUITING
A Study to Evaluate the Efficacy of Prasinezumab (RO7046015/PRX002) in Participants With Early Parkinson's Disease
Parkinson's DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Change From Baseline in Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Total Score (Sum of Parts I, II, and III) at Week 52
From baseline to Week 52

The MDS-UPDRS is a multimodal scale consisting of four parts. Part I assessed non-motor experiences of daily living and has 2 components (Range 0-52). Part IA contains 6 questions and are assessed by the examiner (Range 0-24). Part IB contains 7 questions on non-motor experiences of daily living which was completed by the participant (Range 0-28). Part II assessed motor experiences of daily living (Range 0-52). It contained 13 questions completed by the participant. Part III assessed the motor signs of Parkinson's Disease (PD) and was administered by the rater (Range 0-132). Part III contained 33 scores based on 18 items. For each question a numeric score is assigned between 0-4, where 0 = Normal, 1 = Slight, 2 = Mild, 3 = Moderate, 4 = Severe. The MDS-UPDRS Total Score equals the sum of Parts I,II, and III (Range: 0-236). A higher score indicated more severe symptoms of Parkinson's disease.

Secondary Endpoints

Change From Baseline in the MDS-UPDRS Part IA, Part IB, Part I Total, Part II Total, Part III Total and Part III Subscores
From baseline to Week 52
Change From Baseline in Dopamine Transporter Imaging With Single Photon Emission Computed Tomography (DaT-SPECT) Striatal Binding Ratio (SBR) in the Putamen Ipsilateral to the Clinically Most Affected Side
From baseline to Week 52
Change From Baseline in Montreal Cognition Assessment (MoCA) Total Score
From baseline to Week 52
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1: RO7046015 High DoseEXPERIMENTALParticipants will receive RO7046015 at high dose level as intravenous (IV) infusion every 4 weeks (Q4W) up to 52 weeks in Part 1.
Part 1: RO7046015 Low DoseEXPERIMENTALParticipants will receive RO7046015 at low dose level as IV infusion Q4W up to 52 weeks in Part 1.
Part 1: PlaceboPLACEBO_COMPARATORParticipants will receive placebo as IV infusion Q4W up to 52 weeks in Part 1.
Part 2: RO7046015 High DoseEXPERIMENTALPart 1 RO7046015 high dose group participants and placebo group participants randomized to high dose level will receive RO7046015 at high dose level as IV infusion Q4W for additional 52 weeks in Part 2.
Part 2: RO7046015 Low DoseEXPERIMENTALPart 1 RO7046015 low dose group participants and placebo group participants randomized to low dose level will receive RO7046015 at low dose level as IV infusion Q4W for additional 52 weeks in Part 2.
Part 3: RO7046015 Low DoseEXPERIMENTALAll participants who complete Part 1 and Part 2 will receive monthly IV infusions of RO7046015.

Interventions

NameTypeDescription
RO7046015DRUGRO7046015 will be administered at dose of 4500 milligrams (mg) for participants with body-weight greater than or equal to (\>/=) 65 kilograms (kg) or 3500 mg for participants with body-weight less than (\<) 65 kg.
PlaceboDRUGRO7046015 placebo will be administered to all participants in the indicated arm.
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Eligibility Criteria

Age Range40 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites55

Inclusion Criteria: * Idiopathic PD with bradykinesia plus one of the other cardinal signs of PD (resting tremor, rigidity) being present, without any other known or suspected cause of PD untreated or treated with MAO-B inhibitor * Body weight range between: \>/=45 kg/ 99 pounds (lbs) and less than...

Countries:United StatesAustriaFranceGermanySpain
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Recent Changes (Last 90 Days)

MEDIUMAug 1, 2026NCT03100149primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT03100149primaryCompletionDate: changed
MEDIUMAug 1, 2026NCT03100149primaryCompletionDate: changed

Frequently asked questions about RO7046015

What is RO7046015 used for in Parkinson's Disease?

RO7046015 is an investigational small molecule being studied for the treatment of early Parkinson's Disease. It is currently in Phase 2 clinical development and has not been approved by regulatory authorities. The drug is being evaluated in a randomized, double-blind, placebo-controlled trial to assess its efficacy in participants with early-stage Parkinson's Disease.

How does RO7046015 work?

RO7046015 is a small molecule designed to target and modify the course of Parkinson's Disease. While the specific molecular target is not disclosed, the drug is being investigated for its potential to slow or halt disease progression in early Parkinson's Disease. Its mechanism of action is under evaluation in clinical trials.

Who makes RO7046015?

RO7046015 is being developed by Prothena Corporation plc, a biopharmaceutical company listed on the NASDAQ under the ticker symbol PRTA. The company is conducting a Phase 2 clinical trial to evaluate the drug's efficacy in early Parkinson's Disease.

What phase is RO7046015 in?

RO7046015 is currently in Phase 2 clinical development. It is an investigational drug and has not received FDA approval. The ongoing Phase 2 trial is active but not recruiting participants, and it is designed to evaluate the drug's efficacy in early Parkinson's Disease.

What clinical trials is RO7046015 in?

RO7046015 is being studied in a Phase 2 clinical trial registered as NCT03100149, titled 'A Study to Evaluate the Efficacy of Prasinezumab (RO7046015/PRX002) in Participants With Early Parkinson's Disease.' The trial is active but not recruiting, with an enrollment of 316 participants across the United States, Austria, France, Germany, and Spain.

Is RO7046015 the same as prasinezumab?

Yes, RO7046015 is also known as prasinezumab and PRX002. The Phase 2 clinical trial NCT03100149 refers to the drug as prasinezumab (RO7046015/PRX002), confirming that these names refer to the same investigational therapy for early Parkinson's Disease.