Exercise-Induced Neuroprotection in Parkinson's Disease Models

Parkinson’s disease is characterised by the progressive loss of dopaminergic neurons in the substantia nigra, leading to motor and non-motor deficits. Preclinical models—most commonly the 6-hydroxydopamine (6-OHDA) and MPTP paradigms—have established that appropriately dosed physical activity can attenuate toxin-induced nigrostriatal degeneration, preserve neuronal phenotype and enhance synaptic connectivity. Mechanistic studies point to a convergence of anti-inflammatory actions, upregulation of endogenous neurotrophic factors and modulation of mitochondrial quality control pathways. Exercise suppresses microglial activation, reduces oxidative stress and promotes autophagy, thus preventing the accumulation of misfolded α-synuclein and limiting apoptotic cascades. Concurrently, the secretion of muscle-derived myokines and central production of factors such as BDNF, GDNF and irisin foster neuronal survival, adult neurogenesis and synaptic plasticity. Standardised regimens of aerobic or resistance training in rodent models yield improvements in gait, balance and cognitive performance, underscoring exercise as a universally accessible, non-pharmacological intervention. Translational efforts now focus on optimising intensity, timing and modality to maximise neuroprotective efficacy and inform clinical rehabilitation strategies.

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Exercise-Induced Neuroprotection in Parkinson's Disease Models publication trend

The graph below shows the total number of articles in exercise-induced neuroprotection in parkinson's disease models across all publications each year (not limited to Nature Index journals).

Technical terms

Nigrostriatal pathway: The neural tract linking dopaminergic neurons in the substantia nigra to the striatum, critical for motor control.

Microglial inflammasome (NLRP3): A multiprotein complex in microglia that triggers pro-inflammatory cytokine release when activated.

Irisin: A myokine cleaved from FNDC5 in muscle during exercise, which crosses the blood–brain barrier to influence neuroinflammation and neurogenesis.

Autophagy: A cell’s process for degrading and recycling damaged proteins and organelles, essential for proteostasis.

Apoptosis: Programmed cell death involving caspase activation, which can be suppressed by anti-apoptotic proteins such as Bcl-2.

6-OHDA and MPTP models: Experimental paradigms using neurotoxins to selectively lesion dopaminergic neurons and mimic Parkinsonian pathology in rodents.

References

1. Exercise-Induced Neuroprotection of the Nigrostriatal Dopamine System in Parkinson's Disease. Frontiers in Aging Neuroscience (2017).
2. Physical Training Regulates Mitochondrial Parameters and Neuroinflammatory Mechanisms in an Experimental Model of Parkinson’s Disease. Oxidative Medicine and Cellular Longevity (2015).
3. Aerobic Exercise Restores Hippocampal Neurogenesis and Cognitive Function by Decreasing Microglia Inflammasome Formation Through Irisin/NLRP3 Pathway. Aging Cell (2025).
4. Association of exercise-induced autophagy upregulation and apoptosis suppression with neuroprotection against pharmacologically induced Parkinson's disease. Physical Activity and Nutrition (2018).
5. Running wheel exercise reduces α-synuclein aggregation and improves motor and cognitive function in a transgenic mouse model of Parkinson's disease. PLOS ONE (2017).