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Tc-99m-labeling of modified RNA
C S Hilger1, M C Willis, M Wolters
1Schering AG, Research Laboratories, Berlin, FRG.
Nucleosides & Nucleotides
|September 4, 1999
Summary
Researchers synthesized technetium-99m (Tc-99m)-labeled modified RNA, creating novel radiopharmaceuticals. These Tc-99m-N3S-aptamers show promise as targeted imaging agents for specific biological targets.
Area of Science:
- Radiochemistry
- Molecular Imaging
- Nucleic Acid Chemistry
Background:
- Development of novel radiopharmaceuticals is crucial for advancing molecular imaging.
- RNA-based molecules offer unique properties for targeted drug delivery and diagnostics.
Purpose of the Study:
- To report the synthesis of Tc-99m-labeled modified RNA.
- To explore the potential of this new class of radiopharmaceuticals as target-specific imaging agents.
Main Methods:
- Preparation of N3S-RNA by coupling protected MAG2-units to amino-modified oligonucleotides (ONs).
- Tc-99m labeling of N3S-RNA using established radiolabeling techniques.
- Characterization of radiochemical yield and specific activity.
Main Results:
- Successful synthesis of N3S-RNA achieved.
- Tc-99m labeling resulted in high radiochemical yields (90-95%).
- Achieved specific activities of 37 MBq/nmol, forming 1:1 Tc-99m-N3S-aptamers.
Conclusions:
- A novel method for Tc-99m labeling of modified RNA (N3S-RNA) has been established.
- The resulting Tc-99m-N3S-aptamers are potential candidates for targeted molecular imaging.
- This work opens avenues for developing RNA-based radiopharmaceuticals.