18F-FDS PET/CT in Healthy Volunteers and Patients With Suspected Infection

Overview

This is an open-label dynamic whole-body PET/CT (positron emission tomography/computed tomography) study for investigation of radiation dosimetry, plasma pharmacokinetics, biodistribution, safety and diagnostic performance of 18F-FDS in healthy volunteers and patients with suspected infection. A single dose of nearly 370 MBq 18F-FDS will be intravenously injected into healthy volunteers and patients with suspected infection. Visual and semiquantitative method will be used to assess the PET/CT images. Changes of blood pressure, pulse, respiration, temperature, routine blood and urine tests, serum alanine aminotransferase, albumin, and creatinine, and any adverse events will be collected from the volunteers. Adverse events will also be observed in the patients.

In clinical microbiology, pathogenic enterobacteriaceae are differentiated from other organisms by selectively metabolizing sorbitol. They exclusively express the enzyme sorbitol-6-phosphate dehydrogenase, which is the enzyme responsible for initiating sorbitol metabolism. 2-\[18F\]-fluorodeoxysorbitol (18F-FDS) is a positron-emitting analog of sorbitol. The substitution of the hydroxyl group by fluorine at the C-2 position, however, completely abrogates the recognition by mammalian sorbitol dehydrogenase.18F-FDS could be a suitable probe to selectively label and tomographically image enterobacteriaceae in vivo. For further interests in clinical translation of 18F-FDS, an open-label dynamic whole-body PET/CT study was designed to investigate radiation dosimetry, plasma pharmacokinetics, biodistribution, safety and diagnostic performance of 18F-FDS in healthy volunteers and patients with suspected infection. A single dose of nearly 370 MBq 18F-FDS will be intravenously injected into healthy volunteers and patients with suspected infection. Visual and semiquantitative method will be used to assess the PET/CT images. Changes of blood pressure, pulse, respiration, temperature, routine blood and urine tests, serum alanine aminotransferase, albumin, and creatinine, and any adverse events will be collected from the volunteers. Adverse events will also be observed in the patients.