Interaction of multi-functional silver nanoparticles with living cells
Ilknur Sur1, Dilek Cam, Mehmet Kahraman
1Department of Genetics and Bioengineering, Yeditepe University, Istanbul, Turkey.
Nanotechnology
|April 7, 2010
Summary
Ligand modification of silver nanoparticles (AgNPs) significantly impacts their cellular uptake and toxicity. Lactose-modified AgNPs show increased uptake in cancer cells, suggesting potential for targeted cancer therapy applications.
Area of Science:
- Nanotechnology
- Biomedical Engineering
- Materials Science
Background:
- Silver nanoparticles (AgNPs) possess antibacterial and wound healing properties, with emerging applications in biomedical imaging and photothermal therapy.
- Their utility in biomedicine stems from unique plasmonic properties and versatile surface chemistry for functionalization.
- Understanding ligand-surface interactions is crucial for optimizing AgNP performance in therapeutic and diagnostic contexts.
Purpose of the Study:
- To investigate the cytotoxicity and cellular uptake of AgNPs modified with glucose, lactose, oligonucleotides, and combinations thereof.
- To determine how ligand type influences AgNP interactions with non-cancer (L929) and cancer (A549) cells.
- To explore the potential of functionalized AgNPs for targeted biomedical applications, particularly in cancer therapy.
Main Methods:
- Synthesis and characterization of AgNPs functionalized with glucose, lactose, and oligonucleotides.
- Assessment of cellular uptake rates of modified AgNPs in L929 and A549 cell lines.
- Evaluation of the cytotoxicity of modified and naked AgNPs on A549 cancer cells.
Main Results:
- Ligand modification significantly alters AgNP toxicity and cellular uptake.
- Lactose- and glucose-modified AgNPs exhibit similar uptake rates in L929 cells.
- Lactose-modified AgNPs demonstrate significantly increased uptake rates in A549 cancer cells compared to L929 cells.
- Combined carbohydrate and oligonucleotide ligands influence differential cellular uptake patterns.
- Only naked AgNPs show significant cytotoxicity towards A549 cells, while modified AgNPs do not.
Conclusions:
- The chemical nature of ligands on AgNPs critically dictates their interaction with different cell types.
- Lactose-functionalized AgNPs show promise for enhanced delivery to cancer cells.
- Surface modification can mitigate the cytotoxicity of AgNPs, enhancing their safety profile.
- These findings provide a foundation for developing targeted AgNP-based therapies, especially for cancer treatment.
