Vascular Contributions to Parkinson's Disease Pathophysiology

Emerging evidence recognises that vascular dysfunction interacts with classical neurodegenerative processes to shape the onset and progression of Parkinson’s disease. Age‐related alterations in cerebral small vessels, endothelial barrier integrity and cerebral perfusion can exacerbate α‐synuclein aggregation and neuroinflammation within the nigrostriatal system. White matter hyperintensities and dilated perivascular spaces on magnetic resonance imaging reflect underlying microvascular injury, impaired glymphatic clearance and blood–brain barrier leakage. Such changes are linked not only to cognitive decline but also to parkinsonian motor features, including gait disturbance and dyskinesia. Systemic vascular risk factors—hypertension, diabetes and dyslipidaemia—further perturb cerebral autoregulation, promoting hypoperfusion, oxidative stress and white matter damage. By modulating vascular health, it may be possible to delay cognitive impairment, reduce motor complications and slow disease progression. A fuller appreciation of these vascular contributions invites new preventive and therapeutic strategies that complement dopaminergic and immunomodulatory approaches.

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Vascular Contributions to Parkinson's Disease Pathophysiology publication trend

The graph below shows the total number of articles in vascular contributions to parkinson's disease pathophysiology across all publications each year (not limited to Nature Index journals).

Technical terms

White matter hyperintensity (WMH): Areas of increased signal on T2‐weighted MRI reflecting small vessel damage, demyelination and gliosis.

Perivascular space (PVS): Fluid‐filled channels surrounding cerebral blood vessels that facilitate interstitial fluid drainage; dilated PVS indicate impaired glymphatic clearance.

Cerebral small vessel disease (CSVD): Spectrum of microvascular pathologies including arteriolosclerosis, endothelial dysfunction and microbleeds that affect brain parenchyma.

Blood–brain barrier (BBB): Endothelial interface regulating molecular exchange between blood and brain that, when compromised, permits inflammatory mediators to enter neural tissue.

Glymphatic system: Network of perivascular pathways driven by astroglial water channels responsible for clearance of metabolic waste, including misfolded proteins.

References

1. Vascular risk factors, white matter lesions and cognitive impairment in Parkinson’s disease: the PACOS longitudinal study. Journal of Neurology (2020).
2. Adverse effects of hypertension, supine hypertension, and perivascular space on cognition and motor function in PD. npj Parkinson's Disease (2021).
3. Dilated Perivascular Space in the Midbrain May Reflect Dopamine Neuronal Degeneration in Parkinson’s Disease. Frontiers in Aging Neuroscience (2020).