PET Imaging of Giant Cell and Takayasu Arteritis
Last updated on July 2021Recruitment
- Recruitment Status
- Recruiting
- Estimated Enrollment
- Same as current
Summary
- Conditions
- Giant Cell Arteritis
- Takayasu Arteritis
- Type
- Observational
- Design
- Observational Model: CohortTime Perspective: Prospective
Participation Requirements
- Age
- Between 18 years and 99 years
- Gender
- Both males and females
Description
Up-regulation of SST2 in activated macrophages represents a novel imaging target for measuring vascular inflammation, which has been previously examined in atherosclerosis using 68Ga-DOTATATE. To test the hypothesis that SST2 PET imaging can accurately identify LVV, patients with active GCA or Takay...
Up-regulation of SST2 in activated macrophages represents a novel imaging target for measuring vascular inflammation, which has been previously examined in atherosclerosis using 68Ga-DOTATATE. To test the hypothesis that SST2 PET imaging can accurately identify LVV, patients with active GCA or Takayasu arteritis will undergo vascular 68Ga-DOTATATE or 18F-fluoroethyltriazole-(Tyr3)-octreotate (FETO) PET-MRI at baseline, with repeat imaging after 6 months of treatment. A group of individuals with LVV in clinical remission will also undergo SST2 PET imaging. Data from patients with clinically inactive disease will serve to confirm tracer specificity for active disease, as well as signal reproducibility. 18F-FETO is an alternative SST2 tracer to 68Ga-DOTATATE; the longer half-life and shorter positron range of 18F compared to 68Ga may offer several advantages, including wider tracer availability and improved spatial resolution when imaging small arteries. All patients will also undergo 18F-FDG imaging before treatment, where clinically indicated.
Tracking Information
- NCT #
- NCT04071691
- Collaborators
- Cambridge University Hospitals NHS Foundation Trust
- Wellcome Trust
- Imperial College London
- National Institute for Health Research, United Kingdom
- Investigators
- Principal Investigator: Jason M Tarkin, MBBS PhD University of Cambridge