PET Imaging of Cyclooxygenase-2 in Multiple Sclerosis

Multiple Sclerosis Clinical Trial

Official title: PET Imaging of Cyclooxygenases in Multiple Sclerosis

Status Completed

Clinical Trial Summary

Background:

Multiple sclerosis (MS) is an autoimmune disease that has no cure. MRI is the main tool used in the study and treatment of people with MS. A tracer has been developed for cyclooxygenase-2 (COX-2), an enzyme found in the brain during inflammation. Researchers want to explore the role inflammation plays in MS and see if COX-2 is measurable in the brains of people with the disease.

Objective:

To see if COX-2 is detectable in the brains of individuals with MS.

Eligibility:

People ages 18 and older with MS who are otherwise healthy.

Design:

Participants will be screened with their medical history and a physical exam. They will have an EKG to check the electrical activity of the heart.

Participants study involvement requires 2 to 3 visits and will last between 1 week and 4 months.

Participants will have 2 PET scans of the brain. These might occur on the same day or on separate days. A small amount of a radioactive chemical will be injected through an intravenous catheter. A needle will be used to guide a thin plastic tube into an arm vein. The needle will be removed. Only the catheter will be left in the vein. The PET scanner is shaped like a doughnut. Participants will lie on a bed that slides in and out of the scanner. They will wear a plastic mask molded to fit the head. The scan will last about 90 minutes. Participants will receive the medication celecoxib orally about 2 hours before the second scan.

Participants will have blood tests.

Participants must avoid certain medications a month prior to the PET scans.

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Clinical Trial Description

Study Description: This study will examine whether cyclooxygenase 1 (COX-1) and cyclooxygenase 2 (COX-2) are elevated in the brain of individuals with Multiple Sclerosis (MS)

Objectives: To determine whether COX-1 and COX-2 are detectable in the brains of individuals with MS.

Endpoints:

Primary endpoint: Calculation of COX-1 and COX-2 densities from [11C]PS13 and [11C]MC1 PET scans, respectively, using baseline scans and scans after blockade with ketoprofen and celecoxib, respectively.

Secondary endpoint: 1) Comparison of [11C]PS13 and [11C]MC1 specific uptake in different types of MS lesions (active, chronic active, inactive) and in normal white matter. 2) Comparison of [11C]PS13 and [11C]MC1 specific uptake in the brain lesions of the same subjects ;

Related Conditions & MeSH terms

• Multiple Sclerosis
• Sclerosis

• NCT number: NCT05062083
• Study type: Interventional
• Source: National Institutes of Health Clinical Center (CC)
• Status: Completed
• Phase: Phase 2
• Start date: June 7, 2022
• Completion date: January 30, 2024