| Abstract: | Background Bacterial infection can pose a substantial diagnostic dilemma.99mTc-labeled ciprofloxacin (CPF) was developed as a biologically active radiopharmaceutical to diagnose infection.In the present research,we studied the biodistribution and imaging properties of infection tracer 99mTc-CPF in a mouse model of infection.Methods CPF was labeled with 99mTc and the radiochemical purity and labeling rate were measured.A mouse model of infection was established.We then determined the biodistribution of 99mTC-CPF and conducted the whole body scintigraphy of the animal model.Results 99mTc-Ciprotech was stable for at least 6 hours at room temperature.The labeling rate of CPF by 99mTc was over 90%.Clearance of radioactivity mainly occurred in the liver and kidney,and the clearance from blood was rapid.Both biodistribution and imaging results showed higher uptake of 99mTc-CPF at sites of infection.The infectious tissue/normal tissue ratio peak was 4.30 at 4 hours after injection.Conclusions 99mTc-CPF is a sensitive radiopharmaceutical for scintigraphy of infectious lesions and it is easy to prepare. |
