Comparative Analysis of Gold Nanoparticle Synthesis Using PAMAM G2 Dendrimers via Microwave and Sonication Methods...

Area of Science:

• Nanomedicine
• Materials Science
• Biotechnology

Background:

• Biocompatible nanoparticles are crucial for medical diagnostics and targeted cancer therapy.
• Gold nanoparticles (AuNPs) stabilized by polyamidoamine (PAMAM) dendrimers offer enhanced stability, biocompatibility, and functionalization for cancer theranostics.
• This nanocomplex platform enables precise tumor targeting, improved imaging, and controlled drug release.

Purpose of the Study:

• To synthesize gold nanoparticles stabilized by 2nd generation PAMAM dendrimers.
• To evaluate three synthesis methods: sonication, microwave, and unassisted.
• To assess the physicochemical properties and cytotoxicity of the resulting nanocomplexes.

Main Methods:

• Synthesis of AuNPs stabilized by PAMAM dendrimers using sonication, microwave, and unassisted techniques.
• Physicochemical characterization via UV-Vis spectroscopy, DLS, zeta potential, FTIR, and AFM.
• Cytotoxicity assays on human breast adenocarcinoma and human osteosarcoma cell lines.

Main Results:

• All synthesis methods produced stable, monodisperse nanoparticles with good colloidal stability.
• Physicochemical characterization confirmed successful formation of the nanocomplexes.
• Cytotoxicity assays revealed similar toxicity levels across synthesis methods, with sonication exhibiting the lowest toxicity.

Conclusions:

• Sonication, microwave, and unassisted methods efficiently produce PAMAM-dendrimer-stabilized gold nanoparticles.
• The sonication method demonstrates superior biocompatibility, indicated by lower cytotoxicity.
• PAMAM-dendrimer-stabilized gold nanoparticles are a viable platform for cancer theranostics.