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Triggering endogenous neuroprotective processes through exercise in models of dopamine deficiency
Michael J Zigmond1, Judy L Cameron, Rehana K Leak
1Pittsburgh Institute for Neurodegenerative Disease, University of Pittsburgh, Pittsburgh, PA 15260, USA. zigmond@pitt.edu
Parkinsonism & Related Disorders
|January 20, 2010
Summary
Regular exercise demonstrates neuroprotective effects in animal models of Parkinson's disease. Exercise helps reduce behavioral deficits and dopamine neuron loss, potentially by increasing neurotrophic factors like GDNF.
Area of Science:
- Neuroscience
- Neuroprotection
- Parkinson's Disease Research
Background:
- Parkinson's disease is characterized by dopamine (DA) deficiency.
- Animal models are crucial for understanding neurodegenerative processes.
- Exercise is being investigated for its potential therapeutic benefits.
Purpose of the Study:
- To test the hypothesis that exercise is neuroprotective in animal models of Parkinson's disease.
- To investigate the mechanisms underlying exercise-induced neuroprotection, focusing on GDNF.
- To explore the role of endogenous neuroprotective mechanisms.
Main Methods:
- Animal models (mice, rats, monkeys) were used.
- Exercise (running wheel, treadmill) was administered before and after neurotoxin treatment (MPTP, 6-hydroxydopamine).
- Neuroprotection was assessed via behavioral tests, PET imaging, and biochemical/histochemical analyses.
Main Results:
- Exercise significantly reduced behavioral impairments caused by neurotoxins.
- Exercise attenuated the loss of dopamine neurons.
- Exercise increased the expression of glial cell-derived neurotrophic factor (GDNF), which protected dopamine neurons.
Conclusions:
- Exercise confers neuroprotection in animal models of Parkinson's disease.
- Exercise-induced GDNF and preconditioning effects contribute to neuroprotection.
- Boosting endogenous neuroprotective mechanisms, including through exercise, may be a therapeutic strategy for Parkinson's disease.
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