- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02956148
Follow-up Measurement of Brain PDE10A Enzyme Levels in Huntington´s Disease Gene Expansion Carriers (LONGPDE10)
Follow-up Measurement of Brain Phosphodiesterase 10 A (PDE10A) Enzyme Levels in Huntington´s Disease Gene Expansion Carriers, 18 to 28 Months After Initial Positron Emission Tomography (PET) Measurement in CHDIKI1201/PET-HD-PDE10A (NCT02061722)
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Actual)
Phase
- Early Phase 1
Contacts and Locations
Study Locations
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Copenhagen, Denmark
- The Memory Clinic, Rigshopitalet
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Leiden, Netherlands, K5Q112
- Leiden University Medical Center, Department of Neurology
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Oslo, Norway, 0372 Oslo
- University of Oslo, Nevrologisk poliklinikk
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Lund, Sweden, SE-221 85
- Skane Universitetssjukhus Lund, Neurologiska kliniken
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Stockholm, Sweden, SE-171 76
- Karolinska University Hospital
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Stockholm, Sweden, SE-141 86
- Karolinska Universitetssjukhus, Huddinge
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Uppsala, Sweden
- Uppsala University Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Have participated in and completed study CHDIKI1201/PET-HD-PDE10A and are capable of providing informed consent or have a legal representative authorized to give consent on their behalf.
- Otherwise healthy according to medical history, no co-morbidity of psychotic disorders, physical examination, vital signs and laboratory assessments
- Willing to travel to Stockholm (with a companion if requested) for PET examinations
- Suitable physically and psychologically to travel to Stockholm and undergo PET examinations, as judged by the recruiting Investigator with attention given to symptoms of chorea and anxiety
- Willing to comply with the use of adequate contraceptive measures
Exclusion Criteria:
- Any disease, condition or concomitant medications that significantly compromises the function of the body systems and that, in the opinion of the Investigator might interfere with the conduct of the study or the interpretation
- Regular use of any medication prohibited by this protocol (selective or non-selective PDE inhibitors), with the exception for erectile dysfunction medication, which may be temporarily discontinued prior to the PET measurement
- History of anaphylactoid or anaphylactic reactions to any allergen including drugs and contrast media
- History of other neurological condition (including brain surgery, intracranial hematoma, stroke/cerebrovascular disorders, epilepsy), co-morbidity of psychiatric disorders
- Clinically relevant findings in hematological, biochemical testing or 12-lead ECG as determined by the evaluating physician
- Female subjects who are breast-feeding or have a positive pregnancy test at screening or at Visit 2
Study Plan
How is the study designed?
Design Details
- Primary Purpose: DIAGNOSTIC
- Allocation: NA
- Interventional Model: SINGLE_GROUP
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
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EXPERIMENTAL: Radioligand [18F]MNI-659
All subjects will receive a single intravenous dose of the radioligand [18F]MNI-659 (investigational medicinal product [IMP]) and undergo PET imaging. The radioligand [18F]MNI-659 will be administered at a dose of less than 5 micrograms, i.e. within the micro dosing concept, and no pharmacological effects are expected. The injected radioactivity of [18F]MNI-659 will be 185 MBq/70 kg of body weight ± 10%. |
The effective radiation dose for the injection of [18F]MNI-659 is approximately 5.6 mSv (approximately 2 years of background radiation in Sweden) for an average person weighing 70 kg.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
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The longitudinal changes of PDE10A enzyme availability in the caudate, putamen, and globus pallidus of Huntington's Disease Gene Expansion Carriers by comparison of the follow-up and initial PET measurements.
Time Frame: The follow up PET measurement can be performed from 18 to 28 months after the initial PET measurement that was performed in the CHDIKI/PET-HD-PDE10A Study
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The HDGECs will perform 2 study visits; Visits 1 (screening) and Visit 2 (PET) and 2 telephone follow ups, one after Visit 1 (telephone follow-up after screening) and one after Visit 2, (telephone follow-up after PET) 18 to 28 months after the initial PET measurement conducted in the CHDIKI1201/PET-HD-PDE10A study.
An individual subject's participation in this study will last for a maximum of 97 days
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The follow up PET measurement can be performed from 18 to 28 months after the initial PET measurement that was performed in the CHDIKI/PET-HD-PDE10A Study
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Andrea Varrone, MD, PhD, Karolinska University Hospital
- Study Director: Cristina Sampaio, MD, PhD, CHDI Foundation, Inc.
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ACTUAL)
Study Completion (ACTUAL)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ESTIMATE)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Mental Disorders
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Neurocognitive Disorders
- Genetic Diseases, Inborn
- Basal Ganglia Diseases
- Movement Disorders
- Neurodegenerative Diseases
- Dyskinesias
- Heredodegenerative Disorders, Nervous System
- Dementia
- Cognition Disorders
- Chorea
- Huntington Disease
Other Study ID Numbers
- CHDIKI1401
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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