Metal-based nanoparticles and their toxicity assessment

Area of Science:

• Materials Science
• Toxicology
• Biomedical Engineering

Background:

• Nanoparticles (NPs) possess unique physicochemical properties, including small size and high surface area, leading to diverse applications.
• Metal-based NPs are increasingly used in medicine, consumer goods, and industry.
• The inertness of bulk materials does not always translate to NPs, with some exhibiting enhanced toxicity.

Purpose of the Study:

• To investigate the potential adverse effects of nanoparticles (NPs) across various biological scales.
• To explore the mechanisms by which NPs interact with biological systems.
• To highlight the challenges in assessing the risk-benefit ratio of NP applications.

Main Methods:

• Review of existing literature on NP toxicity.
• Analysis of physicochemical properties influencing NP biological interactions.
• Examination of cellular and molecular mechanisms of NP-induced toxicity.

Main Results:

• NPs can induce adverse effects at organ, tissue, cellular, subcellular, and protein levels.
• Metal NPs, such as silver (Ag), gold (Au), and copper (Cu), can display increased toxicity with decreasing size.
• NPs interfere with cellular antioxidant defenses, trigger inflammation, and damage mitochondria, leading to cell death.

Conclusions:

• The unique properties of NPs present significant toxicological challenges.
• Further research is needed to fully understand and mitigate NP-induced risks.
• Determining if the benefits of NPs outweigh their potential risks requires comprehensive assessment.