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Published on: August 22, 2014
Voluntary exercise alleviates neural functional deficits in Parkinson's disease mice by inhibiting microglial
Jinghui Xu1, Xiaofei He1, Lili Li1
1Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
Abstract:
Microglia are more susceptible to ferroptosis compared to neurons and astrocytes, which may compromise their phagocytic and clearance capabilities of α-synuclein (α-syn) in Parkinson's disease (PD). While the beneficial effects of physical exercise (PE) on reducing α-syn deposition in PD have been highlighted, the role of PE in modulating microglial ferroptosis remains unclear. This study focuses on the impact of exercise on inhibiting microglial ferroptosis and mitigating α-syn accumulation. We demonstrate that voluntary exercise effectively inhibits microglial ferroptosis. Mechanistically, PE-induced upregulation of SLC7A11 inhibits microglial ferroptosis by suppressing ALOX12, thereby enhancing microglial phagocytosis and clearance of α-syn, which is paralleled by improvements in neurological function in PD mice. Collectively, these findings not only underscore the critical role of microglial ferroptosis in the pathological progression of PD but also elucidate the molecular mechanism by which PE attenuates microglial ferroptosis via the SLC7A11/ALOX12 axis.
Insights
Physical exercise inhibits microglial ferroptosis in Parkinson's disease. Exercise upregulates SLC7A11, suppressing ALOX12, which enhances the clearance of alpha-synuclein and improves neurological function.
Area of Science:
- Neuroscience
- Cell Biology
- Pathology
Background:
- Microglia are vulnerable to ferroptosis, impairing their function in Parkinson's disease (PD).
- Physical exercise (PE) shows promise in reducing alpha-synuclein (α-syn) pathology in PD, but its effect on microglial ferroptosis is unknown.
Purpose of the Study:
- To investigate the impact of physical exercise on microglial ferroptosis.
- To elucidate the molecular mechanisms by which exercise modulates microglial ferroptosis and alpha-synuclein clearance in PD.
Main Methods:
- Utilized a mouse model of Parkinson's disease.
- Assessed the effects of voluntary physical exercise on microglial ferroptosis markers.
- Investigated the expression of SLC7A11 and ALOX12 in response to exercise.
- Evaluated microglial phagocytosis and alpha-synuclein clearance.
- Monitored neurological function in exercising PD mice.
Main Results:
- Voluntary physical exercise effectively inhibits microglial ferroptosis.
- Exercise upregulates solute carrier family 7 member 11 (SLC7A11), which suppresses arachidonate 12-lipoxygenase (ALOX12).
- This inhibition of ferroptosis enhances microglial phagocytosis and clearance of alpha-synuclein, leading to improved neurological function in PD mice.
Conclusions:
- Microglial ferroptosis plays a crucial role in Parkinson's disease progression.
- Physical exercise attenuates microglial ferroptosis through the SLC7A11/ALOX12 pathway.
- Targeting microglial ferroptosis presents a potential therapeutic strategy for Parkinson's disease.
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