Dendritic Structures Functionalized with Boron Clusters, in Particular Carboranes, and Their Biological Properties

Area of Science:

• Nanotechnology
• Medicinal Chemistry
• Oncology

Background:

• Boron neutron capture therapy (BNCT) efficacy relies on high boron atom concentration in cancer cells.
• Dendrimers, as hyper-branched macromolecules, offer a scaffold for accumulating numerous boron atoms.
• Carboranes are frequently utilized boron clusters in these dendritic structures.

Purpose of the Study:

• To review the synthesis of diverse dendritic entities incorporating boron clusters.
• To explore the application of these boronated dendrimers in cancer treatment, specifically BNCT.
• To evaluate the biological properties and therapeutic efficiency of these novel agents.

Main Methods:

• Synthesis of dendrimers, dendrons, and Janus dendrimers functionalized with boron clusters (carboranes).
• Incorporation of boron clusters either on the surface or within the dendritic structure.
• Biological evaluation of synthesized compounds against cancerous cells and in animal models for BNCT.

Main Results:

• Successful synthesis of various boronated dendritic structures, including dendrimers, dendrons, and Janus dendrimers.
• Limited but promising biological testing demonstrating efficacy against cancer cells.
• Positive outcomes in animal models, showing increased mean survival time (MST) with boronated dendrimers.

Conclusions:

• Boronated dendrimers are effective carriers for BNCT, significantly increasing boron atom concentration.
• These nanostructures exhibit good therapeutic efficiency and improve survival rates in preclinical cancer models.
• Further investigation into boronated dendrimers holds significant potential for advancing BNCT strategies.