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Eur J Immunol. 2018 Jul;48(7):1199-1210. doi: 10.1002/eji.201747442. Epub 2018 May 16.

Induced CNS expression of CXCL1 augments neurologic disease in a murine model of multiple sclerosis via enhanced neutrophil recruitment.

Author information

1
Department of Pathology, Division of Microbiology and Immunology, University of Utah, School of Medicine, Salt Lake City, UT, USA.
2
Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA.
3
Immunology, Inflammation, and Infectious Disease Initiative, University of Utah, UT, USA.

Abstract

Increasing evidence points to an important role for neutrophils in participating in the pathogenesis of the human demyelinating disease MS and the animal model EAE. Therefore, a better understanding of the signals controlling migration of neutrophils as well as evaluating the role of these cells in demyelination is important to define cellular components that contribute to disease in MS patients. In this study, we examined the functional role of the chemokine CXCL1 in contributing to neuroinflammation and demyelination in EAE. Using transgenic mice in which expression of CXCL1 is under the control of a tetracycline-inducible promoter active within glial fibrillary acidic protein-positive cells, we have shown that sustained CXCL1 expression within the CNS increased the severity of clinical and histologic disease that was independent of an increase in the frequency of encephalitogenic Th1 and Th17 cells. Rather, disease was associated with enhanced recruitment of CD11b+ Ly6G+ neutrophils into the spinal cord. Targeting neutrophils resulted in a reduction in demyelination arguing for a role for these cells in myelin damage. Collectively, these findings emphasize that CXCL1-mediated attraction of neutrophils into the CNS augments demyelination suggesting that this signaling pathway may offer new targets for therapeutic intervention.

KEYWORDS:

Autoimmunity; Chemokines; Demyelination; Neuroinflammation; Neutrophils

PMID:
29697856
PMCID:
PMC6033633
DOI:
10.1002/eji.201747442
[Indexed for MEDLINE]
Free PMC Article

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