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Repeat PET/CT Imaging in People With CAPS and Anakinra-Induced Amyloidosis Using an Amyloid-Reactive Peptide to Measure Changes in Organ-Specific Amyloid Load

NCT06974877 · Status: RECRUITING · Phase: PHASE1 · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2026-05-19

No results posted yet for this study

Summary

Background:

Anakinra is a drug used to treat people with certain diseases that affect their immune systems. Sometimes anakinra can cause proteins under the skin to clump together. These clumps are called amyloidosis; they can spread to other organs. The only way to diagnose amyloidosis is to remove a piece of tissue (biopsy). Researchers want to find a way to locate amyloidosis in internal organs using positron emission tomography (PET)/computed tomography (CT).

Objective:

To test a new tracer used during PET/CT scans in people with amyloidosis. A tracer is a radioactive dye injected into the body.

Eligibility:

Adults aged 18 years or older with amyloidosis from anakinra injections. They must be enrolled in NIH protocol 17-I-0016.

Design:

Participants will come to the clinic once every 6 months for 2 years. Each visit will be 1 day.

They will have a PET/CT scan with the new tracer at each visit: The tracer will be given through a tube attached to a needle inserted into a vein.

The PET/CT scanner is a machine shaped like a doughnut. Participants will lie still on a padded table. The table will move in and out of the machine. The scan takes about 1 hour.

Radiation from the tracer will remain in the body for 24 hours after each scan. Participants will need to follow rules to avoid exposing pets and other people.

Participants will collect a 24-hour urine sample before each visit. They will also have blood tests and a physical exam at each visit.

Participants will receive a follow-up phone call about 1 week after each visit.

Conditions

  • Cryopyrin-Associated Periodic Syndromes
  • Amyloidosis

Interventions

DRUG

124I AT-01

124I-AT-01 is an amyloid-reactive synthetic 45-L amino acid polypeptide radiolabeled with iodine-124, with a theoretical molecular weight of 4763.6 Da (based on amino acid sequence). The polypeptide, AT-01, is not pharmacologically active. 124I-AT-01 binds many forms of human and murine amyloid and is intended to be a PET imaging agent for the detection of amyloid deposits.

Sponsors & Collaborators

  • National Institute of Allergy and Infectious Diseases (NIAID)

    lead NIH

Principal Investigators

  • Sara Alehashemi, M.D. · National Institute of Allergy and Infectious Diseases (NIAID)

Study Design

Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
120 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-09-10
Primary Completion
2031-07-01
Completion
2032-01-31
FDA Drug
Yes

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06974877 on ClinicalTrials.gov