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Puerarin alleviates cadmium-induced mitochondrial mass decrease by inhibiting PINK1-Parkin and Nix-mediated mitophagy
Shuangquan Wen1, Li Wang1, Tao Wang1
1College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, Jiangsu, China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China.
This study reveals how cadmium causes neurotoxicity by decreasing mitochondrial mass via mitophagy. Puerarin, a natural compound, protects neurons by inhibiting this process, showing potential for treating cadmium-induced nerve damage.
Area of Science:
- Neuroscience
- Toxicology
- Mitochondrial Biology
Background:
- Cadmium (Cd) is a neurotoxic heavy metal targeting neuronal mitochondria.
- The mechanism of Cd-induced mitochondrial mass reduction and potential neuroprotective agents are not fully understood.
Purpose of the Study:
- To elucidate the mechanism of Cd-induced mitochondrial mass decrease in rat cortical neurons.
- To investigate the neuroprotective role of puerarin against Cd toxicity.
Main Methods:
- Investigated Cd-induced changes in mitochondrial mass and membrane potential in vitro and in vivo.
- Examined the involvement of mitophagy pathways, including PTEN-induced putative kinase protein 1 (PINK1)-Parkin and Nip3-like protein X (Nix).
- Assessed the effect of puerarin on Cd-induced neurotoxicity and mitophagy.
Main Results:
- Cadmium exposure activated mitophagy via the PINK1-Parkin and Nix pathways, leading to decreased mitochondrial mass and mitochondrial membrane potential (MMP).
- Puerarin treatment improved MMP and inhibited Cd-induced mitophagy in rat cortical neurons.
- Puerarin demonstrated neuroprotective effects in vitro and in vivo by preventing Cd-induced mitochondrial damage.
Conclusions:
- Cadmium induces neurotoxicity by promoting mitophagy and reducing mitochondrial mass.
- Puerarin protects rat cortical neurons from Cd-induced neurotoxicity by inhibiting mitophagy-mediated mitochondrial loss.
- Puerarin shows significant potential as a neuroprotective agent against heavy metal toxicity.
