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Parkinson´s DiseaseROPADNCT03866603

Rostock International Parkinson's Disease Study (ROPAD)

An observational study of Parkinson´s Disease, run by CENTOGENE GmbH Rostock at 110 sites in 15 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

Rostock International Parkinson's Disease Study - An International, multicenter, epidemiological observational study aiming at identification of LRRK2-positive patients, the recruitment of 25,000 PD participants and the establishment of a candidate biomarker in the LRRK2-positive cohort. Read more about this study

Who is it for?
Ages 30 to 80 years
Conditions the study is for
Parkinson´s Disease
How many people
20,112 participants
Where
110 sitesin 15 countries
Study dates
30 May 2019to 10 Oct 2024
Phase
Observational
Are there results?
None posted in the registry

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 30 to 80 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: Participants clinically diagnosed with Parkinson's Disease (PD)

  • Informed consent is obtained from the participant
  • The participant has been clinically diagnosed with Parkinson's disease within the last 5 years (≤ 5 years)
  • The participant is between 30 and 80 years old

Trial locations and contacts

110 sites in 15 countries.

110 sites in 15 countries

United States26 sites
  • Dent Neurologic Institue

    Amherst, New York, 14226

  • Parkinson's Disease and Movement Disorder Center of Baco Raton

    Baco Raton, Florida, 33486

  • Stony Brook University School of Medicine

    Brookhaven, New York, 11772

  • WR-ClinSearch, LLC

    Chattanooga, Tennessee, 37421

  • Rush University Medical Center

    Chicago, Illinois, 60612

  • Linfritz Research Institute

    Coral Gables, Florida, 33134

  • Duke University, Department of Neurology

    Durham, North Carolina, 27710

  • Pharmacology Research Institute

    Encino, California, 91316

  • Northshore University HealthSystem

    Evanston, Illinois, 60201

  • Michigan Institute for Neurological Disorders

    Farmington Hills, Michigan, 48334

  • Neuro-Pain Medical Center

    Fresno, California, 93710

  • Indiana University, Department of Neurology

    Indianapolis, Indiana, 46202

  • Booth Gardner Parkinson's Care Center

    Kirkland, Washington, 98034

  • University of California (UC) San Diego

    La Jolla, California, 92093

  • WR-CRCN

    Las Vegas, Nevada, 89106

  • Loma Linda University

    Loma Linda, California, 92354

  • Pharmacology Research Institute

    Los Alamitos, California, 90720

  • Pharmacology Research Institute

    Newport Beach, California, 92660

  • Renstar Medical Research

    Ocala, Florida, 34475

  • South Shore Neurologic Associates

    Patchogue, New York, 11772

  • M3 Wake Research, Inc.

    Raleigh, North Carolina, 27612

  • Inland Northwest Research

    Spokane, Washington, 99202

  • University of South Florida

    Tampa, Florida, 33613

  • Neuroscience Research Institute of NJ

    Toms River, New Jersey, 08755

  • Tucson Neuroscience Research

    Tucson, Arizona, 85710

  • Vero Beach Neurology & Research Institute

    Vero Beach, Florida, 32960

Other trials in United States

Germany18 sites
  • Universitätsklinik für Neurologie

    Aachen, 52074

  • Neurologisches Fachkrankenhaus für Bewegungsstörungen / Parkinson

    Beelitz, 14547

  • Kliniken Beelitz

    Beelitz-Heilstätten, 14547

  • Charite University Medicine

    Berlin, 10117

  • Gertrudis-Kliniken im Parkison-Zentrum

    Biskirchen, 35638

  • St. Josef-Hospital

    Bochum, 44791

  • Universitätsklinikum Carl Gustav Carus die Dresdner

    Dresden, 01307

  • Asklepios Klinik Barmbek

    Hamburg, 22291

  • Universitätsklinik Hamburg-Eppendorf

    Hamburg-Eppendorf, 20246

  • Universitätsklinik für Neurologie

    Jena, 7740

  • Paracelsus Elena-Klinik

    Kassel, 34128

  • Universitätsklinikum Schleswig-Holstein, Klinik für Neurologie

    Kiel, 24105

  • Universitätsklinikum Leipzig

    Leipzig, 04103

  • Universitätsklinikum Schleswig-Holstein Campus Lübeck

    Lübeck, 23538

  • Universitätsklinikum Marburg Klinik und Poliklinik für Neurologie Parkinson Netzwerk Allianz Marburg (PANAMA)

    Marburg, 35043

  • Diakonie-Klinikum Schwäbisch Hall gGmbH

    Schwäbisch Hall, 74523

  • Asklepios Fachklinikum Stadtroda Klinik für Neurologie, Schmerztherapie und Schlafmedizin

    Stadtroda, 07646

  • Universitätsklinikum Würzburg

    Würzburg, 97080

Other trials in Germany

Brazil13 sites
  • Hospital Ophir Loyola

    Belém, Pará, PA-66063-240

  • Hospital das Clínicas da Universidade Federal de Minas Gerais

    Belo Horizonte, Minas Gerais, 30130-100

  • Hospital Universitário Walter Cândido/ Universidade Federal do Ceará

    Ceará, 60430-372

  • Hospital Angelina Caron

    Curitiba, 83430-000

  • Fundação Hospital Adriano Jorge

    Manaus, 1778

  • Federal University of Health Science of Porto Alegre

    Porto Alegre, Rio Grande do Sul, 90035-190

  • Carolina São Souza

    Ribeirão Preto, 14015-130

  • Faculdade de Medicina de Ribeirão Preto - USP

    Ribeirão Preto, 14040-900

  • Hospital Universitario Pedro Ernesto (HUPE)

    Rio de Janeiro, 20550-000

  • Universidade Metropolitana De Santos

    Santos, São Paulo, CEP 11.045-002

  • Universidade Federal de São Paulo, UNIFESP

    São Paulo, 04040-003

  • Clinica de Neurocirurgia E Neurofisiologia Ltda

    São Paulo, 1636

  • Instituto Israelita de Ensino e Pesquisa Albert Einstein

    São Paulo, 69065-001

Other trials in Brazil

Spain12 sites
  • Hospital Universitario Fundación Alcorcón

    Alcorcón, 28922

  • Instituto Investigacion Biocruces

    Barakaldo, 48903

  • Hospital Universitari Vall d'Hebron

    Barcelona, Barcelona, 08035

  • Hospital Universitario de Bellvitge

    L'Hospitalet de Llobregat, Barcelona, 08907

  • Hospital Universitario de La Princesa

    Madrid, Madrid, 28006

  • Hospital Clínico San Carlos

    Madrid, Madrid, 28049

  • Hospital General Unversitario Gregorio Marañón

    Madrid, 28007

  • HM CINAC | Integrated Neuroscience Center

    Móstoles, 28938

  • Clinica Universidad de Navarra (CUN)

    Pamplona, 31008

  • Hospital Universitario Donostia

    San Sebastián, 20014

  • University Hospital Marqués de Valdecilla

    Santander, 39008

  • Hospital Clinico Universitario Santiago de Compostela

    Santiago de Compostela, Corunna, 15706

Other trials in Spain

United Kingdom12 sites
  • Fairfield General Hospital

    Bury, BL9 7TD

  • University of Dundee

    Dundee, DD1 5EH

  • University of Edinburgh

    Edinburgh, EH16 4SB

  • Royal Devon and Exeter Hospital

    Exeter, EX2 5DW

  • Imperial College Healthcare NHS Trust

    London, W6 8RF

  • Newcastle University, Clinical Ageing Research Unit

    Newcastle upon Tyne, NE4 5PL

  • University of Oxford, Nuffield Department of Clinical Neurosciences

    Oxford, OX3 9DU

  • University of Plymouth

    Plymouth, PL6 8BX

  • Royal Preston Hospital, Department of Neurology

    Preston, PR2 9HT

  • Salford Royal NHS Foundation Trust

    Salford, M6 8HD

  • Royal Cornwall Hospitals Nhs Trust

    Truro, TR1 3LQ

  • Yeovil District Hospital

    Yeovil, BA21 4AT

Other trials in United Kingdom

Israel10 sites
  • Samson Assuta Ashdod University Hospital

    Ashdod, 7747629

  • Barzilai Medical Center

    Ashkelon, 7830604

  • Shamir Medical Center

    Be’er Ya‘aqov

  • Soroka Medical Center

    Beersheba, 8457108

  • RAMBAM Medical Center

    Haifa, 3109601

  • Shaare Zedek Medical Center

    Jerusalem, 9103102

  • Hadassah Medical Center

    Jerusalem, 91120

  • Rabin MC, Beilinson Campus

    Petah Tikva, 4941492

  • Sheba Medical Center

    Ramat Gan, 52621

  • Tel Aviv Sourasky Medical Center - TASMC

    Tel Aviv, 64239

Other trials in Israel

Belgium4 sites
  • University Hospital of Antwerp

    Antwerp, 2650

  • UZ Leuven, Campus Gasthuisberg

    Leuven, 3000

  • Department of Neurology, Centre Hospitalier Universitaire (CHU) de Leige

    Liège, 4000

  • AZ Damiaan, Department of Neurology

    Ostend, 1008400

Other trials in Belgium

Italy4 sites
  • AOUP Secondo Policlinico Federico II Napoli

    Naples, 80131

  • Università di Pavia, Dipartimento di Medicina Molecolare

    Pavia, 27100

  • Asmn - Irccs

    Reggio Emilia, 42123

  • I.R.C.C.S. San Raffaele Pisana

    Roma, 00163

Other trials in Italy

Turkey (Türkiye)4 sites
  • Istanbul Faculty of Medicine

    Istanbul, Istanbul, 34093

  • Koc University Hospital

    Istanbul, 34010

  • Mersin Faculty of Medicine

    Mersin, Mersin, 33110

  • Cukurova University Faculty of Medicine

    Sarıçam, Adana, 01790

Other trials in Turkey (Türkiye)

Portugal2 sites
  • Neurology Department, Hospital de Santa Maria

    Lisbon, 1649-035

  • Centro Hospitalar Universitário de São João

    Porto, 4200-319

Other trials in Portugal

Albania1 site
  • Qendra Spitalore University

    Tirana

Other trials in Albania

Canada1 site
  • Toronto Western Hospital, University Health Network, University of Toronto

    Toronto, Ontario, M5T 2S8

Other trials in Canada

France1 site
  • Groupe Hospitalier Paris Saint-Joseph

    Paris, 75014

Other trials in France

Greece1 site
  • Mediterraneo Hospital

    Athens, 16675

Other trials in Greece

Norway1 site
  • St. Olav's Hospital

    Trondheim, 7006

Other trials in Norway

About this study

Official title: Rostock International Parkinson's Disease Study: an International, Multicenter, Epidemiological Observational Study

Rostock International Parkinson's Disease Study - An International, multicenter, epidemiological observational study aiming at identification of LRRK2-positive patients, the recruitment of 25,000 PD participants and the establishment of a candidate biomarker in the LRRK2-positive cohort.

Read the detailed description

Parkinson's disease (PD) is one of the most common neurodegenerative disorders worldwide, affecting approximately 1% of individuals older than 60 years and causes progressive disability.

Clinical signs and symptoms of PD include the following: asymmetric tremor at rest, bradykinesia, muscle rigidity, postural instability, gait abnormalities including festination and freezing. Onset is typically after the age of 50 years and the disease is commonly slowly progressive. The most common initial finding of PD is a resting tremor in the upper extremity. Over time, participants experience progressive bradykinesia, rigidity, and gait difficulty, while the axial posture becomes progressively flexed. Non-motor symptoms are common in all stages of Parkinson disease and they include constipation, seborrhea, hyposmia or anosmia, sympathetic denervation of the heart, depression and/or apathy, sleep disturbances, cognitive decline and dementia. They may appear prior to the movement disorder and can be used as preclinical markers of PD.

PD is mostly considered as idiopathic disease; however more and more data suggest that it is a disease that involves interaction of genetic and environmental factors. The most common monogenic form and the one most closely resembling idiopathic PD is LRRK2 (Leucine-rich repeat kinase 2 gene) associated PD.

The most common monogenic form and the one most closely resembling idiopathic PD is LRRK2 (Leucine-rich repeat kinase 2 gene) associated PD. First identified in 2004, LRRK2 mutations are currently still the most commonly known cause of PD and account for up to ~40% of all Parkinson's disease cases in select populations. The majority of reported LRRK2-positive PD patients are Caucasian (63%), whereas all other ethnicities comprise ~10% or fewer patients of described mutation carriers despite clusters in the Ashkenazi Jewish and Arab Berber populations. With respect to country of origin, the majority of patients were re-ported to reside in Italy or Spain (14% each), Great Britain (10%) or Norway (9%). Definitely pathogenic variants identified in LRRK2 include p.G2019S, p.R1441C/G/H, p.N1437H, p.Y1699C, and, p.I2020T. Of these, the p.R1441G mutation is particularly frequent, as it represents a founder mutation in the Basque population where it is responsible for 46% of all familial PD. Very rarely, this mutation has also been observed in other populations where it arose on a different haplotype. LRRK2 p.Gly2019Ser mutation accounts for about 0.5% simplex cases and >5% familial cases in various ethnic groups worldwide. Furthermore, genome-wide association studies have identified common polymorphisms in LRRK2 that associate with idiopathic PD, implicating LRRK2 function in susceptibility to late-onset PD in individuals without pathogenic mutations.

LRRK2 mutations cause PD with age-related penetrance and clinical features identical to late-onset sporadic PD. Biochemical studies support an increase in LRRK2 kinase activity and a decrease in GTPase activity for kinase domain and Roc-COR mutations, respectively. Strong evidence exists that LRRK2 toxicity is kinase dependent, leading to extensive efforts to identify selective and brain-permeable LRRK2 kinase inhibitors for clinical development. LRRK2 kinase inhibition is currently one of the most prevailing disease-modifying therapeutic strategies for PD. Thus, LRRK2 kinase inhibitors are in development as potential Parkinson's disease therapeutics.

Furthermore, there is now evidence showing that LRRK2 expression and phosphorylation levels have a potential as markers of Parkinson's disease. Recently, the presence of Lrrk2 was confirmed in exosomes from human biofluids, including urine and cerebrospinal fluid. Moreover, elevated LRRK2 autophosphorylation was identified in brain-derived and peripheral exosomes in LRRK2-mutation carriers. In summary, it has been shown that markers of LRRK2 activity and function may be detected in human blood and that they are relevant for pathogenesis if PD.

Thus, the biochemical analyses of human blood from LRRK2 positive participants and LRRK2 negative participants create a strong base for the development of PD-related biomarkers. This biomarker may in turn be even more accessible than genetic testing and it may serve for diagnosis, prognosis, and prediction of PD.

Keywords
Parkinson´s disease, Biomarker, LRRK2, GBA, PD Genetics
Medical subject headings
Parkinson Disease

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Study groups in NCT03866603
Study groupRoleWhat they receive
Parkinson´s disease individuals* The participant has been clinically diagnosed with Parkinson's disease within the last 5 years (≤ 5 years) * The participant is between 30 and 80 years old

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. To investigate the prevalence of genetic etiologies of PD

    Measured: 79 months

Secondary outcomes (1)
  1. To identify LRRK2-positive PD participants from the primary strata, Establishment of a biomarker in the LRRK2-positive cohort

    Measured: 79 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted7 Mar 2019
  2. Study start30 May 2019
  3. Primary completion10 Oct 2024
  4. Study completion10 Oct 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
20,112 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03866603
Sponsor's protocol ID
ROPAD 01-2019
Acronym
ROPAD
Status last verified
Apr 2026
First submitted
1 Mar 2019
Last updated
13 Apr 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: The plan will be defined at a later stages

Publications

  • Baumann CR. Epidemiology, diagnosis and differential diagnosis in Parkinson's disease tremor. Parkinsonism Relat Disord. 2012 Jan;18 Suppl 1:S90-2. doi: 10.1016/S1353-8020(11)70029-3.

    PubMed 22166466
  • Dayan R, Bick AS, Weill C, Bauer M, Erdman HB, Israel Z, Bergman H, Levin N, Arkadir D. Atrophy-related corticospinal changes in advanced Parkinson's disease are associated with the genetic etiology of the disease. J Parkinsons Dis. 2024 Nov;14(8):1584-1593. doi: 10.3233/JPD-240267. Epub 2024 Nov 4.

    PubMed 39957202

Questions about this trial

What is this clinical trial studying?

An observational study of Parkinson´s Disease, run by CENTOGENE GmbH Rostock at 110 sites in 15 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

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: finished, as of the sponsor's last update on 13 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 110 sites in United States, Germany, Brazil, Spain, United Kingdom and 10 more countries. 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. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

To investigate the prevalence of genetic etiologies of PD (time frame: 79 months). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03866603, which also lists 2 linked publications.

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 13 Apr 2026.

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