Sinapic-Acid-Loaded Nanoparticles Optimized via Experimental Design Methods: Cytotoxic, Antiapoptotoic,...

Area of Science:

• Biomaterials Science
• Nanotechnology
• Pharmacology

Background:

• Sinapic acid (Sa), a plant-derived phenolic compound, possesses broad biological activities but is limited by poor water solubility.
• Nanoparticle formulations are effective carriers for hydrophobic molecules, enhancing their bioavailability and therapeutic potential.

Purpose of the Study:

• To synthesize and optimize sinapic-acid-loaded poly(lactic-co-glycolic acid) nanoparticles (SaNPs).
• To evaluate the in vitro biological activities of SaNPs, including cytotoxicity, apoptosis induction, proliferation inhibition, and antioxidant effects, in a breast cancer cell line (MCF-7).

Main Methods:

• Sinapic acid-loaded PLGA nanoparticles (SaNPs) were synthesized and optimized using experimental design.
• Cytotoxicity (MTT assay), anti-apoptosis (TUNEL assay), anti-proliferation (PCNA assay), and antioxidant activities (SOD, catalase, GSH, MDA, caspase-3) were assessed in MCF-7 cells.
• Comparative analysis was performed between SaNPs and free sinapic acid.

Main Results:

• Optimized SaNPs (170.6 ± 3.6 nm) exhibited dose-dependent cytotoxicity against MCF-7 cells with no observed toxicity in MCF10A cells.
• SaNPs significantly reduced PCNA levels and induced apoptosis in MCF-7 cells.
• Treatment with SaNPs altered oxidative stress markers, including increased MDA and GSH, and decreased SOD and catalase levels, indicating significant biological activity.

Conclusions:

• The developed SaNP formulation effectively enhances the solubility and anticancer efficacy of sinapic acid.
• Polyphenolic compounds encapsulated in nanoparticles show promise for cancer drug design.
• SaNPs serve as a valuable model for formulating other hydrophobic bioactive substances for therapeutic applications.