Clinical trial NCT04514614: Characterizing Rheumatoid Arthritis With 68Ga-FAPI PET/CT
Official title: Characterizing Rheumatoid Arthritis With 68Ga-FAPI PET/CT
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: EARLY_PHASE1
Conditions: Arthritis
Lead sponsor: Peking Union Medical College Hospital
Sponsor class: OTHER
First posted: 2020-08-17
Enrollment: 100
Sex: ALL
Minimum age (years): 18
Maximum age (years): 90
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: DIAGNOSTIC

Brief summary: 68Ga-FAPI has been developed as a tumor-targeting agent as fibroblast activation protein is overexpressed in cancer-associated fibroblasts and some inflammation, such as IgG4-related disease and inflammatory bowel disease. Some researches identified FAP expression in synovial samples taken from both rheumatoid arthritis and osteoarthritis patients.Thus this prospective study is going to investigate whether 68Ga-FAPI PET/CT may be superior for diagnosis, therapy response assessment and follow-up of arthritis than 18F-FDG PET/CT.

Detailed description: Arthritis is a term used to mean any disorder that affects the joints. The two most common forms of arthritis are osteoarthritis and rheumatoid arthritis.Rheumatoid arthritis is an autoimmune chronic inflammatory disease of unknown etiology and is characterized by chronic inflammation of the joint capsule's synovial membrane. This chronic inflammation ultimately destroys the underlying cartilage and bone. Activated fibroblast-like synoviocytes (FLS) line the synovial membrane and are a prominent cell type responsible for inflammation and joint destruction. Osteoarthritis is characterized by degradation of joint cartilage. Studies demonstrate chondrocytes expressed FAP and that chondrocyte FAP expression was elevated in patients with osteoarthritis. Other researches identified FAP expression in synovial samples taken from both rheumatoid arthritis and osteoarthritis patients. However, FAP expression was greater in samples taken from refractory rheumatoid arthritis patients in comparison to end-stage osteoarthritis patients.68Ga-FAPI has been developed as a tumor-targeting agent as fibroblast activation protein is overexpressed in cancer-associated fibroblasts and some inflammation, such as IgG4-related disease and inflammatory bowel disease. Recently the investigators have published an article of the application of 68Ga-FAPI in IgG4-related disease which showed it was more sensitive than FDG in detecting a certain type of inflammations. Thus this prospective study is going to investigate whether 68Ga-FAPI PET/CT may be superior for diagnosis, therapy response assessment and follow-up of arthritis than 18F-FDG PET/CT.

Eligibility criteria: Inclusion Criteria:

* suspected or confirmed untreated arthritis patients;
* 18F-FDG PET/CT within two weeks;
* signed written consent.

Exclusion Criteria:

* pregnancy;
* breastfeeding;
* known allergy against FAPI
* any medical condition that in the opinion of the investigator may significantly interfere with study compliance.

Primary outcomes:
measure: Diagnostic value
timeFrame: through study completion, an average of 1 year
Secondary outcomes:
measure: Metabolic parameters
timeFrame: Time Frame: through study completion, an average of 1 year
measure: Disease burden assessement
timeFrame: through study completion, an average of 1 year
measure: FAPI expression and SUV
timeFrame: through study completion, an average of 1 year
measure: Therapy response
timeFrame: through study completion, an average of 1 year
Other outcomes:
Locations:
city: Beijing
country: China
facility: Peking Union Medical College Hospital
state: Beijing
Study officials:
affiliation: Peking Union Medical College Hospital
name: Yaping Luo, MD
role: PRINCIPAL_INVESTIGATOR
References: