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Chen Y, Lin L, Bhuiyan MIH, He K, Jha R, Song S, Fiesler VM, Begum G, Yin Y, Sun D. Transient ischemic stroke triggers sustained damage of the choroid plexus blood-CSF barrier. Front Cell Neurosci 2023; 17:1279385. [PMID: 38107410 PMCID: PMC10725199 DOI: 10.3389/fncel.2023.1279385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 11/09/2023] [Indexed: 12/19/2023] Open
Abstract
Neuroinflammation is a pathological event associated with many neurological disorders, including dementia and stroke. The choroid plexus (ChP) is a key structure in the ventricles of the brain that secretes cerebrospinal fluid (CSF), forms a blood-CSF barrier, and responds to disease conditions by recruiting immune cells and maintaining an immune microenvironment in the brain. Despite these critical roles, the exact structural and functional changes to the ChP over post-stroke time remain to be elucidated. We induced ischemic stroke in C57BL/6J mice via transient middle cerebral artery occlusion which led to reduction of cerebral blood flow and infarct stroke. At 1-7 days post-stroke, we detected time-dependent increase in the ChP blood-CSF barrier permeability to albumin, tight-junction damage, and dynamic changes of SPAK-NKCC1 protein complex, a key ion transport regulatory system for CSF production and clearance. A transient loss of SPAK protein complex but increased phosphorylation of the SPAK-NKCC1 complex was observed in both lateral ventricle ChPs. Most interestingly, stroke also triggered elevation of proinflammatory Lcn2 mRNA and its protein as well as infiltration of anti-inflammatory myeloid cells in ChP at day 5 post-stroke. These findings demonstrate that ischemic strokes cause significant damage to the ChP blood-CSF barrier, contributing to neuroinflammation in the subacute stage.
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Affiliation(s)
- Yang Chen
- Department of Neurology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
| | - Lin Lin
- Department of Neurology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
| | | | - Kai He
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
- Pittsburgh Institute for Neurodegenerative Diseases, University of Pittsburgh, Pittsburgh, PA, United States
| | - Roshani Jha
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
| | - Shanshan Song
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
- Pittsburgh Institute for Neurodegenerative Diseases, University of Pittsburgh, Pittsburgh, PA, United States
- Research Service, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, United States
| | - Victoria M. Fiesler
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
- Pittsburgh Institute for Neurodegenerative Diseases, University of Pittsburgh, Pittsburgh, PA, United States
| | - Gulnaz Begum
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
- Pittsburgh Institute for Neurodegenerative Diseases, University of Pittsburgh, Pittsburgh, PA, United States
| | - Yan Yin
- Department of Neurology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Dandan Sun
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
- Pittsburgh Institute for Neurodegenerative Diseases, University of Pittsburgh, Pittsburgh, PA, United States
- Research Service, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, United States
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