PET Imaging of Cyclooxygenases in Neurodegenerative Brain Disease

Dementia Clinical Trial

Official title: Phase 1 Study: PET Imaging of Cyclooxygenases in Neurodegenerative Brain Disease

Status Recruiting

Clinical Trial Summary

Background: About 5 million adults in the U.S. have Alzheimer s disease or another adult-onset neurodegenerative disorder. Many studies have found that inflammation in the brain contributes to these diseases. Researchers want to find a better way to measure this inflammation. Objective: To learn whether COX-1 and/or COX-2 is elevated in the brains of individuals with neurodegenerative brain disease compared to healthy volunteers. Eligibility: Adults age 18 years and older in good general health who have an adult-onset neurodegenerative dementia, such as AD, FTD, corticobasal syndrome, or Huntington s disease and healthy adult volunteers enrolled in protocols 01-M-0254 or 17-M-0181. Design: Participants will be screened with medical history, physical exam with vital signs, and lab tests. They will have a neuropsychological testing. Their heart function will be measured. Participants will have a magnetic resonance imaging (MRI) scan. The MRI scanner is a metal tube surrounded by a strong magnetic field. Participants will lie on a table that slides in and out of the tube. The machine makes noise. Participants will get earplugs. Participants will have 2 PET scans. They will be injected with the study drugs through an intravenous catheter placed in an arm vein. The PET scanner is shaped like a doughnut. Participants will lie on a bed that slides in and out of the scanner. A plastic mask will be molded to their head to keep them from moving. A thin plastic tube will be put into an artery at the wrist or elbow crease area. This will be used to draw blood during the scan. Participants will have 2-3 study visits. Participation lasts 1 week to 4 months, depending on scheduling.

Clinical Trial Description

Study Description: This pilot/exploratory study will examine whether cyclooxygenase 1 (COX-1) and COX-2 are elevated in the brain of individuals with neurodegenerative brain disease compared to healthy volunteers. Objectives: Primary Objective: To determine whether COX-1 and/or COX-2 is elevated in the brains of individuals with neurodegenerative brain disease compared to healthy volunteers. Secondary Objective: 1) To determine retest variability and reliability for each radioligand. 2) To evaluate the specific binding of [11C]PS13 to COX-1 in healthy subjects through blocking study using Ketoprofen, a COX-1 inhibitor Endpoints: Primary Endpoint: Measurement of COX-1 and COX-2 density in brain after PET scans with [11C]PS13 and [11C]MC1, respectively. Secondary endpoint: 1) To measure whole-brain distribution volume (VT) of COX-1 and COX-2 in a retest setting; 2) To correlate VT with the presence of amyloid in Alzheimer s disease (AD) patients 3) To calculate the specific binding of [11C]PS13 with a Lassen plot ;

Related Conditions & MeSH terms

• ALS
• Alzheimer Disease
• Alzheimer's Disease
• Brain Diseases
• Dementia
• Parkinson Disease
• Parkinson's Disease

• NCT number: NCT04396873
• Study type: Interventional
• Source: National Institutes of Health Clinical Center (CC)
• Contact: Tara N Turon, C.R.N.P.
• Phone: (301) 827-6599
• Email: tara.turon@nih.gov
• Status: Recruiting
• Phase: Phase 1
• Start date: August 17, 2021
• Completion date: October 3, 2030