Journal
GLIA
Volume 57, Issue 11, Pages 1204-1215Publisher
WILEY
DOI: 10.1002/glia.20842
Keywords
eNOS; nitric oxide; EAE; mice; microglia
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Funding
- NIH [NS42168]
- NMSS pilot project
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Multiple sclerosis (MS) is a demyelinating autoimmune disease characterized by infiltration of T cells into the central nervous system (CNS) after compromise of the blood-brain barrier. A model used to mimic the disease in mice is experimental autoimmune encephalomyelitis (EAE). In this report, we examine the clinical and histopathological course of EAE in eNOS-deficient (eNOS(-/-)) mice to determine the role of nitric oxide (NO) derived from this enzyme in the disease progression. We find that eNOS(-/-) mice exhibit a delayed onset of EAE that correlates with delayed BBB breakdown, thus suggesting that NO production by eNOS underlies the T cell infiltration into the CNS. However, the eNOS(-/-) mice also eventually exhibit more severe EAE and delayed recovery, indicating that NO undertakes dual roles in MS/EAE, one proinflammatory that triggers disease onset, and the other neuroprotective that promotes recovery from disease exacerbation events. (C) 2009 Wiley-Liss, Inc.
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