Cited by 122Barrier Structure and Function StudiesParkinson's Disease Mechanisms and TreatmentsDrug Transport and Resistance Mechanisms

Astrocytic VEGFA : An essential mediator in blood–brain‐barrier disruption in Parkinson's disease

Lan, Guoyu, Wang, Pan, Chan, Robin Barry, Liu, Zongran, Yu, Zhenwei, Liu, Xiaodan, Yang, Ying, Zhang, Jing·2022·Glia

Abstract

The integrity of blood–brain‐barrier (BBB) is essential for normal brain functions, synaptic remodeling, and angiogenesis. BBB disruption is a common pathology during Parkinson's disease (PD), and has been hypothesized to contribute to the progression of PD. However, the molecular mechanism of BBB disruption in PD needs further investigation. Here, A53T PD mouse and a 3‐cell type in vitro BBB model were used to study the roles of α‐synuclein (α‐syn) in BBB disruption with the key results confirmed in the brains of PD patients obtained at autopsy. The A53T PD mouse studies showed that the expression of tight junction‐related proteins decreased, along with increased vascular permeability and accumulation of oligomeric α‐syn in activated astrocytes in the brain. The in vitro BBB model studies demonstrated that treatment with oligomeric α‐syn, but not monomeric or fibrillar α‐syn, resulted in significant disruption of BBB integrity. This process involved the expression and release of vascular endothelial growth factor A (VEGFA) and nitric oxide (NO) from oligomeric α‐syn treated astrocytes. Increased levels of VEGFA and iNOS were also observed in the brain of PD patients. Blocking the VEGFA signaling pathway in the in vitro BBB model effectively protected the barrier against the harmful effects of oligomeric α‐syn. Finally, the protective effects on BBB integrity associated with inhibition of VEGFA signaling pathway was also confirmed in PD mice. Taken together, our study concluded that oligomeric α‐syn is critically involved in PD‐associated BBB disruption, in a process that is mediated by astrocyte‐derived VEGFA.

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Crossref · 10.1002/glia.24109

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Authors
Lan, G., Wang, P., Chan, R. B., Liu, Z., Yu, Z., Liu, X., Yang, Y., & Zhang, J.
Affiliations
  • Peking University (CN)
  • First Affiliated Hospital Zhejiang University (CN)
  • Viva Biotech (China) (CN)
  • Capital Medical University (CN)
Corresponding author
  • Yang, Ying
  • Zhang, Jing
Venue
Glia
Publisher
Wiley
Published
2021-10-29
Volume
70
Issue
2
Pages
337-353
ISSN
  • 0894-1491 (ISSN-L)
  • 1098-1136
OpenAlex
W3210054668
Cited by
122
References
56
Citations by year
2026: 23 · 2025: 32 · 2024: 28 · 2023: 26 · 2022: 12 · 2021: 1
FWCI
6.71
Type
journal article
Language
en
Open access
closed
Locations
  • Glia (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • China Postdoctoral Science Foundation (2020M670063, 2020T130030)
  • National Key Research and Development Program of China (2016YFC1306500)
  • National Natural Science Foundation of China (81571226, 81671187, 82001200, 82020108012)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
Keywords
Parkinson's disease, blood-brain barrier disruption, VEGF-A, astrocytes, alpha-synuclein oligomers, tight junction proteins, vascular permeability, nitric oxide, inducible nitric oxide synthase
MeSH terms
Animals, Astrocytes, Blood-Brain Barrier, Brain, Humans, Parkinson Disease, Vascular Endothelial Growth Factor A, Mice, alpha-Synuclein

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