Size-Dependent Gold Nanoparticle Interaction at Nano-Micro Interface Using Both Monolayer and Multilayer...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Research

Background:

• Gold nanoparticles (GNPs) are investigated for cancer therapeutics, acting as radiation enhancers and drug carriers.
• Effective delivery of GNPs to tumor tissue is crucial for therapeutic success.
• Tumor microenvironments present challenges for nanoparticle penetration.

Purpose of the Study:

• To investigate the effect of gold nanoparticle (GNP) size on interaction with tumor cells.
• To compare GNP behavior at monolayer versus tissue-like multilayer levels.
• To model the post-vascular tumor environment using multilayer cellular structures (MLCs).

Main Methods:

• Gold nanoparticles (GNPs) of 20 nm and 50 nm diameters were utilized.
• Experiments were conducted at both monolayer cell and tissue-like multilayer levels.
• Multilayer cellular structures (MLCs) were grown to mimic tumor extracellular matrix.

Main Results:

• At the monolayer level, larger GNPs showed higher uptake than smaller GNPs.
• At the tissue-like multilayer level, smaller GNPs demonstrated superior penetration compared to larger GNPs.
• MLCs exhibited a more extensive extracellular matrix than monolayer cultures.

Conclusions:

• Smaller GNPs are predicted to be more effective for future cancer therapeutics due to enhanced tumor tissue penetration.
• The tissue-like multilayer model is valuable for optimizing nanoparticle-tissue interactions before in vivo studies.
• This research accelerates the development of GNP-based cancer treatments.