A simple but efficient tumor-targeted nanoparticle delivery system constructed by oleic acid

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Oleic acid (OA), a monounsaturated omega-3 fatty acid, exhibits anti-cancer properties by inducing apoptosis.
• OA's poor solubility limits its in vivo application for cancer treatment.
• Developing effective delivery systems for hydrophobic drugs like OA is crucial for cancer therapy.

Purpose of the Study:

• To develop a nanoparticle formulation of oleic acid (OA) for improved in vivo delivery and tumor targeting.
• To evaluate the anti-tumor efficacy and biodistribution of OA-loaded elastic nanoparticles (OA-ENPs).
• To demonstrate a simple method for achieving enhanced tumor targeting without surface modification.

Main Methods:

• Fabrication of oleic acid elastic nanoparticles (OA-ENPs) with controlled particle size (185.6 nm) and stability.
• Assessment of OA-ENPs' in vitro anti-tumor activity against various cancer cell lines.
• In vivo evaluation of OA-ENPs' tumor inhibition rate, biodistribution, and dose-dependent targeting in a tumor model.

Main Results:

• OA-ENPs demonstrated good stability in physiological media.
• OA-ENPs achieved a significant tumor inhibition rate of 60.3% with minimal side effects.
• A dose-dependent tumor targeting effect was observed: high doses (90 mg/kg) preferentially accumulated in tumors compared to the liver.

Conclusions:

• OA-ENPs represent a promising, stable nanoparticle formulation for oleic acid delivery.
• The developed OA-ENPs show significant anti-tumor efficacy and enhanced tumor targeting capabilities.
• This study presents an effective strategy for achieving targeted nanoparticle delivery without surface functionalization, offering a simplified approach to cancer therapy.