缺血性卒中患者血浆磷酸化α-突触核蛋白水平及磷酸化形成比例的改变

摘要

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.%目的：分析缺血性卒中患者血浆磷酸化α-突触核蛋白（α-Syn）水平以及α-Syn磷酸化形成比例的改变。方法回顾性分析2013年5-9月武警后勤学院附属医院神经内科急性缺血性卒中住院患者45的临床资料，另收集同期年龄和性别相匹配的45名健康者为对照组。利用双抗体夹心的酶联免疫吸附（ELISA）法测定血浆中的磷酸化α-Syn水平。另将基因重组α-Syn加入血浆，计算磷酸化α-Syn占总α-Syn的比例。结果缺血性卒中患者血浆磷酸化α-Syn水平明显高于对照组[（0.0472±0.0042）μmol/L比（0.0312±0.0043）μmol/L]；缺血性卒中患者血浆α-Syn磷酸化形成比例高于对照组[（0．1170±0．0176）μmol /（100μmol·h）比（0．0364±0．0098）μmol/（100μmol·h）]。受试者工作特征（ROC）曲线分析结果显示，血浆磷酸化α-Syn水平变化判定缺血卒中的特异度和敏感度分别为0．88和0．81，曲线下面积（AUC）为0．91，cut-off值为0.060 mol/L，AUC 95％CI：0．889～0．961；血浆α-Syn磷酸化形成比例改变判定缺血卒中的特异度和敏感度分别为0．84和0．81，AUC为0．90，cut-off值为0．055 mol/L，AUC 95％CI：0．898～0.971。结论缺血性卒中患者血浆磷酸化α-Syn水平和血浆α-Syn磷酸化形成比例较健康者增高。