Cancer Brachytherapy at the Nanoscale: An Emerging Paradigm

Area of Science:

• Oncology
• Materials Science
• Radiochemistry

Background:

• Brachytherapy is a standard cancer treatment involving surgically implanted radioactive sources.
• Traditional brachytherapy requires invasive procedures and can lead to off-target radiation exposure.
• Nanomaterials offer a potential solution to overcome the limitations of conventional brachytherapy.

Purpose of the Study:

• To review advancements in functionalized radiolabeled nanoplatforms for brachytherapy.
• To analyze limitations of current brachytherapy sealed sources.
• To highlight the advantages of radiolabeled nanoparticles (NPs) in nanoscale brachytherapy.

Main Methods:

• Exploration of well-dispersed radiolabeled nanomaterials for brachytherapy.
• Development of nanoplatforms with high radiolabeling yield, stability, and tumor retention.
• Attachment of targeting ligands to nanoplatforms for enhanced tumor specificity.
• Utilizing molecular imaging for noninvasive visualization and tracking of nanoplatforms.

Main Results:

• Nanoscale brachytherapy offers a noninvasive alternative to standard brachytherapy.
• Radiolabeled NPs show promise for improved tumor targeting and retention.
• Progress has been made in radiolabeling methods, delivery techniques, and NP internalization.

Conclusions:

• Functionalized radiolabeled nanoplatforms represent a promising advancement in brachytherapy.
• Overcoming challenges in nanomaterial design and preclinical validation is crucial for clinical translation.
• Nanoscale brachytherapy has the potential to offer safer and more effective cancer treatment.