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Updated: Jul 24, 2025
In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis
Published on: February 3, 2018
Recent insights into autophagy and metals/nanoparticles exposure
Qiong Li1, Yajing Feng1, Ruike Wang1
1Department of Environmental Health and Environment and Health Innovation Team, College of Public Health, Zhengzhou University, Zhengzhou, 450001 Henan People's Republic of China.
This review explores how heavy metals and metal nanoparticles disrupt cellular processes, particularly autophagy, leading to oxidative stress and potential health issues like neurodegenerative diseases and cancer. Understanding these mechanisms may lead to new therapeutic strategies using autophagy modulators.
Area of Science:
- Environmental Toxicology
- Cellular Biology
- Nanotechnology
Background:
- Anthropogenic pollutants, including heavy metals (Pb, Cd, Cr, As, Hg, Al) and metal nanoparticles (MNPs), pose significant threats to environmental safety and public health.
- These substances exhibit systemic toxicity, inducing oxidative stress, lipid peroxidation, protein modification, and DNA damage, even at low concentrations.
- Dysregulated autophagy is increasingly linked to diseases such as neurodegenerative disorders and cancers.
Purpose of the Study:
- To review the contribution of autophagy and mitophagy to metal/MNP-mediated toxic effects.
- To focus on the role of autophagic signaling factors during exposure to metals, metal mixtures, and MNPs.
- To summarize the interaction between autophagy and reactive oxygen species (ROS)-mediated oxidative damage in cellular responses to metals/NPs.
Main Methods:
- Literature review of recent data on metal/MNP toxicity and autophagy.
- Analysis of studies investigating the role of autophagy regulators in response to metal exposure.
- Synthesis of information on the interplay between oxidative stress and autophagy in metal/NPs toxicity.
Main Results:
- Metals and MNPs can disrupt basal autophagic activity, contributing to adverse health effects.
- Autophagy and mitophagy play a significant role in mediating the toxic effects of various metals and MNPs.
- Interactions between autophagy and ROS-mediated oxidative damage are crucial in regulating cell survival under metal/NP exposure.
Conclusions:
- Autophagy modulation (activators/inhibitors) shows potential for mitigating the systemic toxicity of metals and MNPs.
- Further research is needed to fully elucidate the complex interplay between autophagy, oxidative stress, and metal toxicity.
- Targeting autophagy pathways could offer novel therapeutic strategies for diseases linked to environmental pollutant exposure.
