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J Neuropathol Exp Neurol. 2017 Jun 1;76(6):467-478. doi: 10.1093/jnen/nlx034.

Oxidative Injury and Iron Redistribution Are Pathological Hallmarks of Marmoset Experimental Autoimmune Encephalomyelitis.

Author information

1
From the Department of Immunobiology, Biomedical Primate Research Centre, Rijswijk, The Netherlands (JD, NvD, BAH, YSK); Department of Neuroscience, University Medical Center, University of Groningen, Groningen, The Netherlands (JD, BAH, JDL); Medical University of Vienna, Center for Brain Research, Vienna, Austria (JB, HL); Centre for Neuroregeneration, University of Edinburgh, Edinburgh, United Kingdom (GRC, DJM); and Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam, The Netherlands (SMAvdP, JvH).

Abstract

Oxidative damage and iron redistribution are associated with the pathogenesis and progression of multiple sclerosis (MS), but these aspects are not entirely replicated in rodent experimental autoimmune encephalomyelitis (EAE) models. Here, we report that oxidative burst and injury as well as redistribution of iron are hallmarks of the MS-like pathology in the EAE model in the common marmoset. Active lesions in the marmoset EAE brain display increased expression of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (p22phox, p47phox, and gp91phox) and inducible nitric oxide synthase immunoreactivity within lesions with active inflammation and demyelination, coinciding with enhanced expression of mitochondrial heat-shock protein 70 and superoxide dismutase 1 and 2. The EAE lesion-associated liberation of iron (due to loss of iron-containing myelin) was associated with altered expression of the iron metabolic markers FtH1, lactoferrin, hephaestin, and ceruloplasmin. The enhanced expression of oxidative damage markers in inflammatory lesions indicates that the enhanced antioxidant enzyme expression could not counteract reactive oxygen and nitrogen species-induced cellular damage, as is also observed in MS brains. This study demonstrates that oxidative injury and aberrant iron distribution are prominent pathological hallmarks of marmoset EAE thus making this model suitable for therapeutic intervention studies aimed at reducing oxidative stress and associated iron dysmetabolism.

KEYWORDS:

Experimental autoimmune encephalomyelitis (EAE); Marmoset; Multiple sclerosis; Neurodegeneration; Reactive oxygen species

PMID:
28505283
DOI:
10.1093/jnen/nlx034
[Indexed for MEDLINE]

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