A Brief Review of Radiolabelling Nucleic Acid-Based Molecules for Tracking and Monitoring

Area of Science:

• Biomedical Sciences
• Radiochemistry
• Molecular Imaging

Background:

• Nucleic acid therapeutics are rapidly advancing.
• There is a growing demand for radiolabeled oligonucleotides to track drug distribution.
• Complex molecular properties of oligonucleotides pose challenges for radionuclide integration.

Purpose of the Study:

• To review the challenges and strategies for radiolabeling nucleic acid-based molecules.
• To discuss the application of radiolabeled oligonucleotides in preclinical research.
• To highlight different radiolabeling approaches for molecular imaging.

Main Methods:

• Review of radiolabeling techniques for nucleic acids.
• Discussion of radiometal chelation and direct radioisotope incorporation.
• Exploration of direct vs. indirect radiolabeling strategies (e.g., pretargeting).

Main Results:

• Radiometals require chelating agents for stable oligonucleotide complexation.
• Carbon-11/-14 or tritium can be directly incorporated into the oligonucleotide structure.
• Selection of radiolabeling strategy depends on study design and research question.

Conclusions:

• Effective radiolabeling is crucial for understanding the in vivo behavior of nucleic acid therapeutics.
• Various radiolabeling methods exist, each with specific advantages and limitations.
• Optimized radiolabeling strategies enable precise tracking and monitoring in preclinical studies.