The aim of this study was to investigate the possible protective effects and mechanisms of 20-hydroxyecdysone, an insect steroid hormone, on HEO2-induced cytotoxicity in human neuroblastoma SH-SYSY cells. Pretreatment with 20-hydroxyecdysone significantly elevated the cell viability and decreased LDH leakage in H2O2-treated SH-SY5Y cells. 20-Hydroxyecdysone also dramatically reduced malondialdehyde （MDA） contents and enhanced the superoxide dismutase （SOD） activities under oxidative stress conditions. Furthermore, 20-hydroxyecdysone pretreatment inhibited apoptosis by decreasing the Bax/Bcl-2 ratio and attenuating the activation of caspase-3. These results suggest that 20-hydroxyecdysone can protect SH-SYSY cells against H2O2-induced cytotoxicity and might potentially be used to treat neurodegenerative diseases induced by oxidative stress and anontosis.
目的:系统评价替米沙坦对比氯沙坦治疗原发性高血压的疗效与安全性,以为临床提供循证参考。方法:计算机检索Cochrane图书馆、Medline、PubMed、EMBase、中国期刊全文数据库、中文科技期刊全文数据库、中国生物医学文献数据库,全面收集替米沙坦与氯沙坦治疗原发性高血压的随机对照试验(RCT),对符合纳入标准的文献进行质量评价,并运用Rev Man 5.0统计软件进行Meta分析。结果:共纳入11项RCT,合计1 907例患者。Meta分析结果显示,替米沙坦降低患者收缩压[MD=-3.37,95%CI(-4.99,-1.75),P<0.000]、舒张压[MD=-2.76,95%CI(-4.04,-1.49),P<0.000]及降压有效率[RR=1.14,95%CI(1.05,1.24),P=0.002]均显著优于氯沙坦,两组比较差异均有统计学意义;两组患者不良反应发生率比较差异无统计学意义[RR=0.91,95%CI=(0.74,1.12),P=0.38]。结论:替米沙坦治疗原发性高血压疗效优于氯沙坦,安全性相似。
