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Published in: Journal of Neuroinflammation 1/2023

Open Access 01-12-2023 | Stroke | Research

Inhaled nitric oxide suppresses neuroinflammation in experimental ischemic stroke

Authors: Rebecca I. Sienel, Uta Mamrak, Janina Biller, Stefan Roth, Andreas Zellner, Tipparat Parakaw, Rayomand S. Khambata, Arthur Liesz, Christof Haffner, Amrita Ahluwalia, Burcu F. Seker, Nikolaus Plesnila

Published in: Journal of Neuroinflammation | Issue 1/2023

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Abstract

Ischemic stroke is a major global health issue and characterized by acute vascular dysfunction and subsequent neuroinflammation. However, the relationship between these processes remains elusive. In the current study, we investigated whether alleviating vascular dysfunction by restoring vascular nitric oxide (NO) reduces post-stroke inflammation. Mice were subjected to experimental stroke and received inhaled NO (iNO; 50 ppm) after reperfusion. iNO normalized vascular cyclic guanosine monophosphate (cGMP) levels, reduced the elevated expression of intercellular adhesion molecule-1 (ICAM-1), and returned leukocyte adhesion to baseline levels. Reduction of vascular pathology significantly reduced the inflammatory cytokines interleukin-1β (Il-1β), interleukin-6 (Il-6), and tumor necrosis factor-α (TNF-α), within the brain parenchyma. These findings suggest that vascular dysfunction is responsible for leukocyte adhesion and that these processes drive parenchymal inflammation. Reversing vascular dysfunction may therefore emerge as a novel approach to diminish neuroinflammation after ischemic stroke and possibly other ischemic disorders.
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Metadata
Title
Inhaled nitric oxide suppresses neuroinflammation in experimental ischemic stroke
Authors
Rebecca I. Sienel
Uta Mamrak
Janina Biller
Stefan Roth
Andreas Zellner
Tipparat Parakaw
Rayomand S. Khambata
Arthur Liesz
Christof Haffner
Amrita Ahluwalia
Burcu F. Seker
Nikolaus Plesnila
Publication date
01-12-2023
Publisher
BioMed Central
Keywords
Stroke
Nitrate
Published in
Journal of Neuroinflammation / Issue 1/2023
Electronic ISSN: 1742-2094
DOI
https://doi.org/10.1186/s12974-023-02988-3

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