Actin-binding carbon dots selectively target glioblastoma cells while sparing normal cells

Area of Science:

• Biomaterials Science
• Cancer Research
• Nanotechnology

Background:

• Curcumin, a compound from Curcuma longa, shows anti-cancer potential but suffers from poor solubility, stability, and bioavailability, limiting clinical success.
• Developing strategies to overcome these limitations is crucial for harnessing curcumin's therapeutic benefits.

Purpose of the Study:

• To synthesize curcumin-derived carbon dots (CurCD) and evaluate their properties and anti-cancer efficacy.
• To compare the solubility, stability, bioavailability, and anti-cancer activity of CurCD with native curcumin.
• To assess the potential of CurCD as a biomarker and evaluate its biocompatibility.

Main Methods:

• Curcumin and ethylenediamine were used to synthesize carbon dots (CurCD).
• CurCD properties including solubility, fluorescence, and photostability were characterized.
• In vitro anti-cancer activity was assessed using glioblastoma cells.
• Biocompatibility was evaluated in normal cells and zebrafish embryos.
• Affinity to actin filaments was investigated.

Main Results:

• Curcumin-derived carbon dots (CurCD) exhibited excellent aqueous solubility, excitation-dependent emission, and enhanced photostability compared to curcumin.
• CurCD demonstrated comparable or enhanced anti-cancer activity against glioblastoma cells in vitro.
• CurCD showed selective affinity for actin filaments, suggesting potential as a biomarker.
• CurCD displayed significantly lower toxicity in normal cells and zebrafish embryos than curcumin, indicating improved biocompatibility.

Conclusions:

• Curcumin-derived carbon dots (CurCD) offer superior solubility, stability, and biocompatibility over native curcumin.
• CurCD present a promising strategy for overcoming curcumin's limitations, enhancing its anti-cancer potential.
• This work opens new avenues for developing plant-derived nanoparticles for therapeutic applications.