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。
3月21日,北京大学药学院药事管理与临床药学系史录文/管晓东团队在医学权威期刊柳叶刀·发现科学系列eClinicalMedicine在线发表了题为“Prevalence of aggressive care among patients with cancer near the end of life:a systematic review and meta-analysis”的最新研究成果。
目的:评价静脉注射和雾化吸入硫酸镁治疗儿童哮喘急性发作的有效性。方法:系统检索Cochrane图书馆、Medline、PubMed、Embase、CNKI、VIP、CBM数据库,全面收集静脉注射和雾化吸入硫酸镁对比安慰剂治疗儿童哮喘急性发作的随机对照试验(RCT),对符合纳入标准的文献进行质量评价,并运用Rev Man 5.2软件进行Meta分析。结果:共纳入9个RCT,844例患者。Meta分析结果显示,与对照组比较,静脉注射硫酸镁可以降低患儿的住院率,改善患儿的肺功能(P<0.05),未降低患儿的哮喘症状评分;与对照组比较,雾化吸入硫酸镁可以改善患儿的肺功能(P<0.05),未降低患儿的住院率及哮喘症状评分。结论:静脉注射和雾化吸入硫酸镁可以改善儿童哮喘急性发作临床疗效中的某些指标,但其疗效及安全性尚需更多高质量、大样本、多中心的RCT加以验证。