Alginic acid nanoparticles prepared through counterion complexation method as a drug delivery system

Area of Science:

• Biomaterials Science
• Nanotechnology
• Drug Delivery Systems

Background:

• Alginic acid nanoparticles offer potential for drug delivery.
• Developing stable and effective nanoparticle formulations is crucial for cancer therapy.

Purpose of the Study:

• To prepare and characterize novel alginic acid nanoparticles.
• To evaluate the in vitro and in vivo antitumor efficacy of doxorubicin-loaded nanoparticles.

Main Methods:

• Non-solvent-aided counterion complexation and Ca(2+) cross-linking for nanoparticle synthesis.
• Characterization of nanoparticle morphology, size, and surface charge.
• In vitro drug loading and cellular uptake studies (endocytosis).
• In vivo tumor accumulation (NIR imaging) and antitumor activity assessment in mice.

Main Results:

• Spherical alginic acid nanoparticles (approx. 100 nm) with negative surface charge (zeta potential approx. -30 mV) were successfully prepared.
• Ca(2+) cross-linking enhanced nanoparticle stability at physiological pH.
• Negatively charged nanoparticles demonstrated cancer cell uptake via endocytosis.
• In vivo studies showed significant tumor accumulation and superior antitumor efficacy of drug-loaded nanoparticles compared to free doxorubicin.

Conclusions:

• The developed alginic acid nanoparticles are stable, effectively loaded with drugs, and exhibit enhanced tumor targeting.
• These nanoparticles represent a promising platform for improved cancer therapy, demonstrating superior in vivo antitumor activity.