Effects of sulindac on oxidative stress in an autistic model induced by prenatal exposure to valproic acid

AIM: To investigate the effects of sulindac on oxidative stress in autism. METHODS: With an autistic model induced by prenatal exposure to valproic acid (VPA), we detected the expression of the signaling molecules of canonical Wnt pathway in the prefrontal cortex (PFC) and hippocampus (HC) of autistic rats treated with sulindac. The protein expression levels of glycogen synthase kinase 3β (GSK-3β), β-catenin and 4-hydroxynonenal (4-HNE) were observed by Western blotting. The mRNA expression of thioredoxin(Trx)1 and Trx2 was assessed by semi-quantitative RT-PCR.RESULTS: The protein level of GSK-3β and mRNA levels of Trx1 and Trx2 were lower, whereas the protein expression levels of β-catenin and 4-HNE were higher in VPA group than those in control group. In contrast, the protein levels of GSK-3β were significantly higher in the animals treated with both VPA and sulindac than those in VPA group, while the levels of β-catenin and 4-HNE were decreased.CONCLUSION: Sulindac attenuates oxidative stress in the pathogenesis of autism, suggesting the up-regulation of the Wnt/β-catenin signaling pathway disrupts oxidative homeostasis and further facilitates susceptibility to autism.     

高效液相色谱-二极管阵列法测定保健酒中的舒林酸

[目的]建立保健食品中违禁添加舒林酸的液相检测方法。[方法]通过酸性条件氯仿和碱性水溶液两步液-液萃取,从保健酒中提取和净化舒林酸。使用Kromasil 100-5C18(250×4.6 mm E74572)色谱柱,流动相为0.06 mol/L醋酸缓冲液(pH 4.0)-甲醇-乙腈(59∶29∶12,V/V/V);流速为0.8 ml/min进行分离;检测波长为328 nm。根据色谱峰保留值比对和加标试验,结合二极管阵列扫描图谱对可疑样品定性,并根据外标法峰面积定量检测。[结果]检品和基质成分实现了基线分离,最低检测限为0.5μg/ml,工作曲线的线性范围:10~160μg/ml(R2=0.999 6),回收率88.6%~91.6%。[结论]该研究建立的方法准确、可靠,适用于检测保健品中违法添加的舒林酸。