ClinicalTrials.gg
CompletedNCT02157714Updated Oct 21, 2016

Multiple Ascending Dose Study of PRX002 in Patients With Parkinson's Disease

A Phase 1 interventional study of PRX002 and Placebo in Parkinson's Disease, sponsored by Prothena Biosciences Limited. Completed at 8 sites in United States. Open to participants aged 40 Years to 80 Years. Per ClinicalTrials.gov, last updated 2016-10-21.

Sponsored by Prothena Biosciences Limited · Phase 1, Interventional, and Treatment

Phase
Phase 1
Study type
Interventional
Enrollment
64
Allocation
Randomized
Ages
40 Years to 80 Years
Sex
All
01

Study summary

This multiple ascending dose study is to determine safety, tolerability, pharmacokinetics and immunogenicity of PRX002 in approximately 60 patients with Parkinson's disease.

02

Conditions studied

  • Parkinson's Disease

Browse trials for

03

In context

Parkinson Disease

4,573 studies on the registry are indexed under Parkinson Disease; 1,086 are open to participants now.

This study's planned enrollment of 64 is above the median of 40 across 3,353 interventional studies indexed under Parkinson Disease.

Browse Parkinson Disease studies →

Lead sponsor

Prothena Biosciences Limited is the lead sponsor of 5 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
40 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Idiopathic Parkinson's disease, Hoehn and Yahr 1-3
  • Body weight range of ≥ 45kg/99 lbs to ≤ 110 kg/242 lbs
  • Female subjects must be surgically sterile or or if of must use
  • Male subjects and their partners of childbearing potential must use contraception

Exclusion criteria

Exclusion Criteria:

  • Significant cardiac history
  • Abnormal MRI
  • Significant laboratory abnormalities
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
64 participants (estimated)

Study arms

  • Experimental
    PRX002

    PRX002

    Drug: PRX002

  • Placebo comparator
    Placebo

    Placebo

    Other: Placebo

Interventions

06

What researchers measure

Primary outcomes

  1. Safety and tolerability as determined by number of subjects with adverse events

    Time frame: up to 6 months

  2. Determination of pharmacokinetics parameters

    maximum concentration (Cmax)

    Time frame: up to 6 months

  3. Determination of pharmacokinetics parameters

    time of the maximum measured concentration (Tmax)

    Time frame: up to 6 months

  4. Determination of pharmacokinetics parameters

    area under the concentration-time curve from time zero to the last quantifiable concentration time-point (AUClast)

    Time frame: up to 6 months

  5. Determination of pharmacokinetics parameters

    area under the concentration-time curve from time zero extrapolated to infinity (AUCinf)

    Time frame: up to 6 months

  6. Determination of pharmacokinetics parameters

    elimination rate constant

    Time frame: up to 6 months

  7. Determination of pharmacokinetics parameters

    terminal elimination half life (t½)

    Time frame: up to 6 months

  8. Determination of pharmacokinetics parameters

    clearance (CL)

    Time frame: up to 6 months

  9. Determination of pharmacokinetics parameters

    apparent volume of distribution (Vd)

    Time frame: up to 6 months

  10. Determination of pharmacokinetics parameters

    average concentration over a dosing interval (Cav)

    Time frame: up to 6 months

  11. Determination of pharmacokinetics parameters

    area under the plasma concentration-time curve for a dosing interval (AUCtau)

    Time frame: up to 6 months

  12. Determination of pharmacokinetics parameters

    minimum observed concentration (Cmin)

    Time frame: up to 6 months

Secondary outcomes

  1. Immunogenicity as determined by measurement of anti-PRX002 antibodies

    Multiple clinical and exploratory biomarkers will be assessed

    Time frame: up to 3 months

07

Study locations

8 sites
  • Collaborative Neuroscience Network, LLC
    Long Beach, California 90806, United States
  • Institute for Neurodegenerative Disorders
    New Haven, Connecticut 06510, United States
  • Parkinson's Disease and Movement Disorders Center of Boca Raton
    Boca Raton, Florida 33486, United States
  • MD Clinical
    Hallandale Beach, Florida 33009, United States
  • Compass Research, LLC
    Orlando, Florida 32806, United States
  • QUEST Research Institute
    Bingham Farms, Michigan 48025, United States
  • Oregon Health and Science University, Department of Neurology
    Portland, Oregon 97239, United States
  • Baylor College of Medicine
    Houston, Texas 77030, United States
08

References and documents

Publications

  • Jankovic J, Goodman I, Safirstein B, Marmon TK, Schenk DB, Koller M, Zago W, Ness DK, Griffith SG, Grundman M, Soto J, Ostrowitzki S, Boess FG, Martin-Facklam M, Quinn JF, Isaacson SH, Omidvar O, Ellenbogen A, Kinney GG. Safety and Tolerability of Multiple Ascending Doses of PRX002/RG7935, an Anti-alpha-Synuclein Monoclonal Antibody, in Patients With Parkinson Disease: A Randomized Clinical Trial. JAMA Neurol. 2018 Oct 1;75(10):1206-1214. doi: 10.1001/jamaneurol.2018.1487. PubMed 29913017 ↗
  • Schenk DB, Koller M, Ness DK, Griffith SG, Grundman M, Zago W, Soto J, Atiee G, Ostrowitzki S, Kinney GG. First-in-human assessment of PRX002, an anti-alpha-synuclein monoclonal antibody, in healthy volunteers. Mov Disord. 2017 Feb;32(2):211-218. doi: 10.1002/mds.26878. Epub 2016 Nov 25. PubMed 27886407 ↗
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 21, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02157714
Lead sponsor
Prothena Biosciences Limited
Collaborators
Hoffmann-La Roche
Responsible party
Sponsor
First posted
Jun 6, 2014
Start date
Jun 2014
Primary completion
Sep 2016
Last update
Oct 21, 2016

Study contacts

Jay Soto
study director · Clinical Trials Prothena Biosciences Inc
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2016. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drug tested here: Prasinezumab

Start the discussion