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

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.

Timeline

Start

2025-09-10

Primary completion

2031-07-01

Completion

2032-01-31

Publications

• Background Alehashemi S, Dasari S, Metpally A, Uss K, Castelo-Soccio LA, Heller T, Kellman P, Chen MY, Ahlman M, Kim J, Wargo S, Kuhns DB, Fink D, de Jesus A, Martin PS, Chang R, Bolanos J, Lee CR, Nasr SH, Goldbach-Mansky R, McPhail E. Anakinra-Associated Systemic Amyloidosis. Arthritis Rheumatol. 2024 Jan;76(1):100-106. doi: 10.1002/art.42664. Epub 2023 Nov 29.
• Background Nasr SH, Alehashemi S, Dasari S, Waldman M, Afzali B, Chiu A, Bolanos J, Goldbach-Mansky R, McPhail ED. Anakinra-associated renal amyloidosis. Kidney Int. 2024 Feb;105(2):395-396. doi: 10.1016/j.kint.2023.08.020. No abstract available.
• Background Alehashemi S, Dasari S, de Jesus AA, Cowen EW, Lee CR, Goldbach-Mansky R, McPhail ED. Anakinra-Associated Amyloidosis. JAMA Dermatol. 2022 Dec 1;158(12):1454-1457. doi: 10.1001/jamadermatol.2022.2124.

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