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[Labelling of ceftizoxime with 99mTc]
V Gomes Barreto1, F Iglesias, M Roca
1Becaria del CAPES, Brasil.
Revista Espanola De Medicina Nuclear
|February 15, 2001
Summary
A novel method successfully labels ceftizoxime with technetium-99m (99mTc), yielding a radiolabeled antibiotic with high efficiency and preserved biological activity for potential infection imaging.
Area of Science:
- Nuclear Medicine
- Radiopharmacy
- Medicinal Chemistry
Context:
- Developing novel radiotracers is crucial for advancing diagnostic imaging.
- Antibiotics labeled with radionuclides can aid in localizing infections.
- Ceftizoxime, a third-generation cephalosporin, offers broad-spectrum activity.
Purpose:
- To present a new method for labeling ceftizoxime with 99mTc.
- To assess the radiochemical purity, stability, and biological activity of the labeled compound.
- To evaluate the potential of 99mTc-labeled ceftizoxime for in vivo infection detection.
Summary:
- A labeling method using ceftizoxime, sodium dithionite, and 99mTc was developed.
- High labeling efficiency (94.9%) and stability up to 6 hours were achieved.
- The resulting 99mTc-ceftizoxime-derived compound (CDC) retained 83% of its original antibiotic activity.
Impact:
- This study introduces a promising radiolabeled antibiotic for infection imaging.
- The method provides a stable 99mTc-labeled ceftizoxime derivative with significant biological activity.
- The findings support the potential clinical utility of 99mTc-CDC for detecting infections in vivo.