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Published in: Journal of Neuroinflammation 1/2011

Open Access 01-12-2011 | Research

Reduction of neutrophil activity decreases early microvascular injury after subarachnoid haemorrhage

Authors: Victor Friedrich, Rowena Flores, Artur Muller, Weina Bi, Ellinor IB Peerschke, Fatima A Sehba

Published in: Journal of Neuroinflammation | Issue 1/2011

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Abstract

Background

Subarachnoid haemorrhage (SAH) elicits rapid pathological changes in the structure and function of parenchymal vessels (≤ 100 μm). The role of neutrophils in these changes has not been determined. This study investigates the role of neutrophils in early microvascular changes after SAH

Method

Rats were either untreated, treated with vinblastine or anti-polymorphonuclear (PMN) serum, which depletes neutrophils, or treated with pyrrolidine dithiocarbamate (PDTC), which limits neutrophil activity. SAH was induced by endovascular perforation. Neutrophil infiltration and the integrity of vascular endothelium and basement membrane were assessed immunohistochemically. Vascular collagenase activity was assessed by in situ zymography.

Results

Vinblastine and anti-PMN serum reduced post-SAH accumulation of neutrophils in cerebral vessels and in brain parenchyma. PDTC increased the neutrophil accumulation in cerebral vessels and decreased accumulation in brain parenchyma. In addition, each of the three agents decreased vascular collagenase activity and post-SAH loss of vascular endothelial and basement membrane immunostaining.

Conclusions

Our results implicate neutrophils in early microvascular injury after SAH and indicate that treatments which reduce neutrophil activity can be beneficial in limiting microvascular injury and increasing survival after SAH.
Appendix
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Metadata
Title
Reduction of neutrophil activity decreases early microvascular injury after subarachnoid haemorrhage
Authors
Victor Friedrich
Rowena Flores
Artur Muller
Weina Bi
Ellinor IB Peerschke
Fatima A Sehba
Publication date
01-12-2011
Publisher
BioMed Central
Published in
Journal of Neuroinflammation / Issue 1/2011
Electronic ISSN: 1742-2094
DOI
https://doi.org/10.1186/1742-2094-8-103

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