Related Experiment Video
Updated: Jun 4, 2025
06:45
A Caenorhabditis elegans Nutritional-status Based Copper Aversion Assay
Published on: July 26, 2017
6.5K
Copper exposure induces neurotoxicity through ferroptosis in C. elegans
Jianglan Wei1, Ying Zhang1, Wei Shi1
1Key Laboratory of Environmental Medicine Engineering, Ministry of Education of China, School of Public Health, Southeast University, Nanjing, 210009, Jiangsu, China.
Chemico-Biological Interactions
|January 3, 2025
Summary
Copper exposure triggers ferroptosis, a cell death pathway, leading to neurotoxicity and behavioral deficits in C. elegans. Inhibiting ferroptosis reversed these harmful effects, revealing a new mechanism in copper-induced neurodegeneration.
Area of Science:
- Neuroscience
- Toxicology
- Cell Biology
Background:
- Copper is essential but toxic at high levels, linked to neurodegenerative diseases.
- Ferroptosis, a regulated cell death, is implicated in heavy metal neurotoxicity, but its role in copper neurotoxicity is unknown.
- Previous work showed copper induces neurotoxicity via oxidative stress in C. elegans.
Purpose of the Study:
- To investigate the role of ferroptosis in copper-induced neurotoxicity.
- To elucidate the molecular mechanisms of copper neurotoxicity in C. elegans.
Main Methods:
- Utilized Caenorhabditis elegans (C. elegans) as a model organism.
- Assessed behavioral changes (head thrash, body bends, pumping, defecation) and neuronal integrity (GABAergic, dopaminergic neurons).
- Measured iron (Fe2+), malondialdehyde (MDA), and glutathione (GSH) levels.
- Analyzed the expression of ferroptosis-related genes (gpx-1, ftn-1, acs-17) using RNA interference (RNAi).
Main Results:
- Copper exposure caused behavioral inhibition and neuronal degeneration, which were reversed by the ferroptosis inhibitor Fer-1.
- Copper increased Fe2+ and MDA levels while decreasing GSH, indicating ferroptosis activation.
- RNAi knockdown of gpx-1 and ftn-1 exacerbated copper-induced neurotoxicity, whereas acs-17 knockdown showed a protective effect.
Conclusions:
- Copper induces neurotoxicity, including behavioral and neuronal impairments, through the activation of ferroptosis in C. elegans.
- Ferroptosis plays a significant role in the mechanisms underlying copper-induced neurodegeneration.
- This study provides novel insights into copper neurotoxicity pathways.
