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• W2011244850 abstract "• Perivascular iron deposits are colocalized with nitrotyrosine in mice with cEAE. • Iron-catalyzed nitration of proteins is a plausible mechanism of tissue damage in cEAE and possibly MS. • Extravasation of albumin may be a protective mechanism to limit perivascular tissue damage. Nitration of proteins, which is thought to be mediated by peroxynitrite, is a mechanism of tissue damage in multiple sclerosis (MS). However, protein nitration can also be catalyzed by iron, heme or heme-associated molecules independent of peroxynitrite. Since microhemorrhages and perivascular iron deposits are present in the CNS of MS patients, we sought to determine if iron is associated with protein nitration. A cerebral model of experimental autoimmune encephalomyelitis (cEAE) was utilized since this model has been shown to have perivascular iron deposits similar to those present in MS. Histochemical staining for iron was used together with immunohistochemistry for nitrotyrosine, eNOS, or iNOS on cerebral sections. Leakage of the blood–brain barrier (BBB) was studied by albumin immunohistochemistry. Iron deposits were colocalized with nitrotyrosine staining around vessels in cEAE mice while control animals revealed minimal staining. This finding supports the likelihood that nitrotyrosine formation was catalyzed by iron or iron containing molecules. Examples of iron deposits were also observed in association with eNOS and iNOS, which could be one source of substrates for this reaction. Extravasation of albumin was present in cEAE mice, but not in control animals. Extravasated albumin may act to limit tissue injury by binding iron and/or heme as well as being a target of nitration, but the protection is incomplete. In summary, iron-catalyzed nitration of proteins is a likely mechanism of tissue damage in MS." @default.
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• W2011244850 date "2014-10-01" @default.
• W2011244850 modified "2023-09-27" @default.
• W2011244850 title "Perivascular iron deposits are associated with protein nitration in cerebral experimental autoimmune encephalomyelitis" @default.
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• W2011244850 doi "https://doi.org/10.1016/j.neulet.2014.05.004" @default.
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