Investigation of Inflammation in Alzheimer's Disease and Related Dementias (ADRD) Using [11C]-CS1P1

NCT ID: NCT06129838

Last Updated: 2025-06-10

Basic Information

• Recruitment Status: RECRUITING
• Total Enrollment: 80 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2023-05-05
• Study Completion Date: 2027-05-31

Brief Summary

This study involves a brain positron emission tomography (PET) scan with a new, investigational radioactive tracer called [11C]-CS1P1 to identify inflammation in the brain by testing with healthy older adults and with cognitively impaired older adults.

Detailed Description

The primary objective of this IND study is to further evaluate the [11C]-CS1P1 for PET imaging of S1P1 expression in healthy older adults and in adults with Alzheimer's disease and Related Dementia (ADRD). Investigators will complete imaging of the brain and neck in older adults with normal cognition and those with clinically diagnosed cognitive impairment from ADRD to characterize [11C]-CS1P1 uptake in the brain. Investigators will compare the normal cognition participants to patients with ADRD to collect preliminary data that will subsequently test the hypothesis that [11C]-CS1P1 uptake is elevated in patients with ADRD.

Conditions

Alzheimer Disease

Study Design

• Observational Model Type: OTHER
• Study Time Perspective: PROSPECTIVE

Study Groups

Healthy participants

Healthy participants will receive a single intravenous bolus injection of 12.0 - 17.0 milliCurie (mCi) of the investigational radiotracer \[11C\]-CS1P1. Participants will then undergo a brain \[11C\]-CS1P1 PET scan

[11C]-CS1P1

Intervention Type: DRUG

Participants will receive a single intravenous bolus injection of 12.0 - 17.0 milliCurie (mCi) of the investigational radiotracer \[11C\]-CS1P1. Participants will then undergo a brain \[11C\]-CS1P1 PET scan

Participants with cognitive impairment (Alzheimer's disease)

Participants with cognitive impairment will receive a single intravenous bolus injection of 12.0 - 17.0 milliCurie (mCi) of the investigational radiotracer \[11C\]-CS1P1. Participants will then undergo a brain \[11C\]-CS1P1 PET scan

[11C]-CS1P1

Intervention Type: DRUG

Participants will receive a single intravenous bolus injection of 12.0 - 17.0 milliCurie (mCi) of the investigational radiotracer \[11C\]-CS1P1. Participants will then undergo a brain \[11C\]-CS1P1 PET scan

Interventions

[11C]-CS1P1

Participants will receive a single intravenous bolus injection of 12.0 - 17.0 milliCurie (mCi) of the investigational radiotracer \[11C\]-CS1P1. Participants will then undergo a brain \[11C\]-CS1P1 PET scan

Intervention Type: DRUG

Other Intervention Names

Sphingosine 1 Phosphate 1

Eligibility Criteria

Inclusion Criteria

• Male or female, any race;
• Age ≥ 50 years;
• Capable of providing written informed consent OR having a legally authorized representative (LAR) to provide informed consent for volunteering to undergo research procedure;
• Additional inclusion for ADRD group: clinical diagnosis of mild cognitive impairment or early dementia due to ADRD, OR biomarker diagnosis of Alzheimer's disease, with or without symptoms.

Exclusion Criteria

• Hypersensitivity to [11C]-CS1P1 or any of its excipients;
• Contraindications to PET, CT, or MRI (e.g. certain incompatible electronic medical devices, inability to lie still for extended periods) that make it potentially unsafe for the individual to participate;
• Severe claustrophobia;
• Women who are currently pregnant or breast-feeding;
• Currently undergoing radiation therapy;
• Any condition that, in the opinion of the Sponsor-Investigator or designee could increase risk to the participant, limit the participant's ability to tolerate the research procedures or interfere with collection of the data (e.g., renal or liver failure, advanced cancer);
• Participants who in the last 6 months experienced any of the following cardiovascular conditions or findings in the screening electrocardiogram (ECG): clinically significant cardiac arrhythmias including high grade heart block (type 2 or greater), unstable angina, or decompensated heart failure requiring hospitalization or Class III/IV heart failure;
• Moderate to Severe anemia with Hemoglobin < than 9.9 in both males and females.
• Current or recent (within 12 months prior to screening) participation in research studies involving radioactive agents such that the total research-related radiation dose to the participant in any given year would exceed the limits set forth in the U.S. Code of Federal Regulations (CFR) Title 21 Section 361.1. https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?FR=361.1

• Minimum Eligible Age: 50 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Washington University School of Medicine

OTHER

Sponsor Role: lead

Responsible Party

Tammie L. S. Benzinger, MD, PhD

Professor of Radiology Division, Diagnostic Radiology Section, Neuroradiology

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Tammie Benzinger

Role: PRINCIPAL_INVESTIGATOR

Washington University School of Medicine

Locations

Washington University School of Medicine

St Louis, Missouri, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

Jayashree Rajamanickam

Role: CONTACT

jayashree.r@wustl.edu

314 273 6140

Kelley Jackson

Role: CONTACT

kelleyj@wustl.edu

314 362 3613

Facility Contacts

Jayashree Rajamanickam

Role: primary

jayashree.r@wustl.edu

314-273-6140

Kelley Jackson

Role: backup

kelleyj@wustl.edu

314 362 3613

Other Identifiers

CS1P1-ADRD

Identifier Type: -

Identifier Source: org_study_id