68Ga-NI-FAPI is a novel radiotracer incorporating a hypoxia sensitive nitroimidazole (NI)-moiety and a FAP-targeting. In this study, we observed the safety, biodistribution, radiation dosimetry and diagnostic value of 68Ga-NI-FAPI PET/CT in patients with different types of cancer.
Carcinoma-associated fibroblasts (CAFs) are an integral part of the tumor microenvironment, and fibroblast activation protein (FAP), as a specific marker of CAFs, is overexpressed in more than 90% of epithelial malignant tumors' CAFs, with limited expression in normal tissues, making it an appropriate target for various tumors. Currently, several tracers targeting FAP for diagnostic purposes have been developed, such as 68Ga-FAPI-04, 68Ga-FAPI-02, and showed high efficacy in tumor staging and restaging. 68Ga-NI-FAPI is a novel agent incorporating a hypoxia sensitive nitroimidazole (NI)-moiety and a FAP-targeting. This pilot study was prospectively designed to evaluate the safety, biodistribution, radiation dosimetry and diagnostic value of 68Ga-NI-FAPI in patients with different types of cancer.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
40
Intravenous injection of one dosage of 111-148 MBq (3-4 mCi) 68Ga-NI-FAPI.
Department of Nuclear Medicine, First Affiliated Hospital of Fujian Medical University
Fuzhou, Fujian, China
RECRUITINGsafety and tolerability
Hematologic status, liver function, renal function and General vital signs were recorded before and 1 week after administration of radiopharmaceutical. Adverse events were categorized using the Common Toxicity Criteria for Adverse Events 5.0.
Time frame: up to 1 week
Dosimetry of normal organs and tumors
The semiquantitative dosimetry will be performed based on PET/CT acquisitions after the first administration of 68Ga-NI-FAPI. The dose delivered to normal organs and tumors will be recorded.
Time frame: From right after tracer injection to 150 minutes at post-injection
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