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[68Ga]Ga-HBED-CC-exendin-4 and [68Ga]Ga-NOTA-exendin-4 PET/CT Imaging in the Same Group of Insulinoma Patients

Insulinoma Clinical Trial

Official title:
A Pilot Prospective Comparison of [68Ga]Ga-HBED-CC-exendin-4 and [68Ga]Ga-NOTA-exendin-4 PET/CT Imaging in the Same Group of Insulinoma Patients

Clinical Trial Summary

Glucagon-like peptide-1 receptor (GLP-1R)-targeted PET imaging with 68Ga-labeled compounds is able to provide superior sensitivity and specificity to detect insulinoma, like the widely studied [68Ga]Ga-NOTA-exendin-4. This pilot study was prospectively designed to evaluate the early dynamic distribution of [68Ga]Ga-HBED-CC-exendin-4, a novel radiopharmaceutical targeting GLP-1R, which was compared with [68Ga]Ga-NOTA-exendin-4 in the same group of insulinoma patients.

Clinical Trial Description

Insulinoma is the most common cause of endogenous hyperinsulinemic hypoglycemia in adult patients without diabetes. The only curative treatment of an insulinoma is its surgical removal. Therefore, exact preoperative localization of the insulinoma is critical to planning the surgical intervention. MR imaging, CT, or endoscopic ultrasound is normally used to localize insulinomas. However, the small size of the tumors (often,1 cm) limits the sensitivity of these methods. In recent years, a new receptor-targeted imaging technique, glucagon-like peptide-1 receptor (GLP-1R) imaging, for detecting insulinoma has been established. GLP-1R is expressed on benign insulinoma cell surfaces with very high incidence (>90%) and density (8,133 dpm/mg of tissue). No other peptide receptor has been found to exhibit such high expression levels in insulinoma. [68Ga]Ga-HBED-CC-exendin-4, a novel radiopharmaceutical targeting GLP-1R, with the urea fragment of a conjugate that employs the HBED-CC chelator for labeling with 68Ga in order to In order to reduce the accumulation of radioactivity in the kidneys. This pilot study was prospectively designed to evaluate the early dynamic distribution of [68Ga]Ga-HBED-CC-exendin-4 compared with [68Ga]Ga-NOTA-exendin-4 in the same group of Insulinoma patients. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT05034783
Study type Interventional
Source Peking Union Medical College Hospital
Contact
Status Active, not recruiting
Phase Early Phase 1
Start date October 1, 2021
Completion date June 1, 2023
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