Acid-activatable oxidative stress-inducing polysaccharide nanoparticles for anticancer therapy

Area of Science:

• Biomaterials Science
• Nanotechnology
• Pharmacology

Background:

• Drug delivery systems aim to improve drug efficacy but can cause toxicity.
• Polysaccharide-based systems offer potential for reduced toxicity and synergistic effects.
• Cinnamaldehyde exhibits anticancer properties via reactive oxygen species (ROS) generation.

Purpose of the Study:

• To develop cinnamaldehyde-conjugated maltodextrin (CMD) nanoparticles as a prodrug and drug carrier.
• To investigate the synergistic anticancer effects of CMD nanoparticles with camptothecin (CPT).

Main Methods:

• Conjugation of cinnamaldehyde to maltodextrin via acid-cleavable acetal linkages.
• Formulation of CMD nanoparticles and encapsulation of camptothecin (CPT).
• Evaluation of acid-triggered ROS generation, apoptosis induction, and in vivo anticancer activity in mouse xenograft models.

Main Results:

• CMD nanoparticles demonstrated acid-triggered ROS generation and induced apoptotic cell death.
• CPT-loaded CMD nanoparticles showed significantly enhanced anticancer activity compared to CPT alone.
• Synergistic therapeutic effects between CMD nanoparticles and CPT were observed in vivo.

Conclusions:

• CMD nanoparticles serve as an effective polymeric prodrug of cinnamaldehyde and a versatile drug carrier.
• The developed nanoparticles hold significant promise for enhancing anticancer therapy through synergistic drug combinations.