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- W2080470197 abstract "Nitrosative stress, where nitrosylation of tyrosine (Tyr) leading to 3-nitrotyrosine proteins or free 3-nitrotyrosine is the most prominent change, has been proposed as a pathogenic mechanism in Parkinson's disease (PD). Levels of 3-nitrotyrosine proteins in serum and cerebrospinal fluid (CSF) of patients with PD have not been studied. Nitrosative stress-induced protein changes in serum and CSF were analyzed in patients with PD (n=54) and controls (n=40). Herein, we demonstrate the presence of nitrosative stress in serum and CSF of patients with early PD leading to selective increase of 3-nitrotyrosine proteins other than nitroalbumin, without free 3-nitrotyrosine (Hoehn-Yahr stage 1, p<0.05; stage 2, p<0.01). Among 3-nitrotyrosine proteins, nitro-α-synuclein (N-αSyn) was detected in serum, not CSF, and the sites of Tyr nitrosylation were observed to be modified in patients with early PD. Thus, the intensity of nitrosylation of Tyr125/136 residues is enhanced (stage 1, p<0.05; stage 2, p<0.01), and that of the Tyr39 site is reduced (stage 1, p<0.05), and the ratio between both parameters (α-synuclein with nitrosylated tyrosines 125 and 136 [N-αSyn-Tyr125/136]:α-synuclein with nitrosylated tyrosine 39 [N-αSyn-Tyr39] ratio) is significantly higher in patients with early PD (p<0.01). These observations lead to the hypothesis that evaluating nitrosative stress through enhanced levels of 3-nitrotyrosine proteins in serum and CSF without changes in nitroalbumin, together with the profile of tyrosine nitrosylation of serum αSyn characterized by dominant nitrosylation of Tyr125/136, could serve for the diagnosis of sporadic PD." @default.
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- W2080470197 date "2013-09-20" @default.
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- W2080470197 title "May the Evaluation of Nitrosative Stress Through Selective Increase of 3-Nitrotyrosine Proteins Other Than Nitroalbumin and Dominant Tyrosine-125/136 Nitrosylation of Serum α-Synuclein Serve for Diagnosis of Sporadic Parkinson's Disease?" @default.
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- W2080470197 doi "https://doi.org/10.1089/ars.2013.5250" @default.
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