Changes of plasma phosphorylated α-synuclein level and α-synuclein phosphorylation rate in patients with ischemic stroke / 中国脑血管病杂志

ABSTRACT

Objective Toanalyzethechangesofplasmaphosphorylatedα-synuclein(α-Syn)level andα-Synphosphorylationrateinpatientswithischemicstroke.Methods Theclinicaldataof45 patients with acute stroke admitted to the Department of Neurology,the Affiliated Hospital of Logistics University of People′s Armed Force Police from May 2013 to September 2013 were analyzed retrospectively, and the age and sex matched 45 healthy subjects were recruited as a control group at the same time. The plasma phosphorylatedα-Syn level was measured by a double-antibody sandwich enzyme-linked immunosorbent assay (ELISA),besides,the gene-recombinated α-Syn was added into plasma,and the phosphorylated α-Syn accountingforthetotalratioofα-Synwascalculated.Results Theplasmaphosphorylatedα-Synlevelof patients with ischemic stroke was significantly higher than that of the control group (0. 0472 ± 0.0042μmol/L vs. 0. 0312 ± 0. 0043μmol/L). The plasma α-Syn phosphorylation rate of patients with ischemic stroke was higher than that of the control group (0. 1170 ± 0. 0176 vs. 0. 0364 ± 0. 0098μmol/(100μmol ·h ). Receiver operating characteristic (ROC )curve analysis showed that the specificity and sensitivity of the plasma phosphorylatedα-Syn concentration changes in determining ischemic stroke were 0. 88 and 0. 81 respectively. The area under curve (AUC)was 0. 91 and the cut-off value was 0. 060 mol/L;AUC 95%confidence interval (CI)was 0. 889 to 0. 961;the specificity and sensitivity of the plasma α-Syn phosphorylation rate changes in determining ischemic stroke were 0. 84 and 0. 81 respectively,AUC was 0.90andthecut-offvaluewas0.055mol/L;AUC95%CIwas0.898to0.971.Conclusion Theplasma phosphorylated α-Syn level and plasma α-Syn phosphorylation rate in patients with ischemic stroke were higher than those of the normal control group.