Didymin attenuates doxorubicin-induced cardiotoxicity by inhibiting oxidative stress

Objective: This study was designed to investigate the protective effects of didymin (Did) on doxorubicin (DOX)-induced cardiotoxicity. Methods: After pretreatment with Did (2, 4, 8 mg/kg intraperitoneal i.p.) for 7 d, the male C57 mice were injected with single dose of DOX (20 mg/kg i.p.). The cardioprotective effect of Did was observed on the 7th day after DOX treatment. Results: DOX delayed body growth and caused cardiac tissue injury, oxidative stress, and mitochondrial dysfunction. Similar experiments in H9C2 cardiomyocytes showed that DOX reduced cell viability, increased generation of reactive oxygen species (ROS) and fragmentation of DNA, decreased mitochondrial membrane potential, and induced cardiomyocyte apoptosis. However, all of these adverse effects were suppressed by Did pretreatment. Did increased protein expression of glutamate-L-cysteine ligase catalytic subunit (GCL), heme oxygenase 1 (HO-1), and nuclear factor erythroid 2-related factor 2 (Nrf2). Besides, Did also induced activation of PI3K/AKT. Conclusion: These findings indicated Did prevented DOX-induced cardiac injury and apoptosis via activating PI3K/AKT/Nrf2 signaling pathway.     

Observation on Therapeutic Effect of Acupuncture and Medication for 30 Cases of Post-Stroke Depression

目的照观察针药结合与单纯西药治疗中风后抑郁症(PSD)的疗效及不良反应.方法采用开放性对照研究方法,将93例抑郁症患者随机分为三组,针药组30例、百忧解A组30例、百忧解B组33例.针药组口服百忧解20 mg/d并加以针刺,百忧解A组口服百忧解20 mg/d,百忧解B组口服百忧解20～40 mg/d;三组治疗时间均为42 d,以汉密尔顿抑郁量表(HAMD)及副反应观察量表(TESS)分别观察三组的疗效及不良反应.结果针药组有效率为86.7%,百忧解A组为63.3%,百忧解B组为87.9%,针药组疗效优于百忧解A组,与百忧解B组疗效差异无统计学意义(P＞0.05),但药物不良反应发生率百忧解B组高于针药组.结论药并用是脑卒中后抑郁症的一种疗效确切且副反应少的治疗方法.     

色谱在中药现代化中的作用

色谱是一门理论与技术研究很成熟的分离分析科学,本文扼要分析了中药研究的现状,对色谱在中药物质基础与质量控制,制剂工艺,中药物质组分与生物分子作用,配伍机理等方面的应用作了介绍,并讨论了它在中药现代化方面的多重功能与更深入的开发前景。     

大蒜素对巨噬细胞介导的细胞毒作用的影响

大蒜素单独或与其他激活剂协同作用时,具有增强巨噬细胞的抗肿瘤作用。同时可增强某些瘤细胞对巨噬细胞介导的细胞毒作用的敏感性。     

耳穴压豆法治疗失眠症的护理研究

目的:探讨耳穴压豆法治疗失眠症的效果及方法。方法:将我院失眠症患者60例采用耳穴压豆法实施护理,追踪随访临床效果。结果:治疗后患者入睡时间小于30分钟人数明显多于治疗前,比较差异具有统计学意义(P<0.05)。治疗后患者睡眠时间大于6h人数明显多于治疗前,比较差异具有统计学意义(P<0.05)。本组总有效率达98.33%。结论:耳穴压豆法治疗失眠症的效果明确,值得应用。     

西妥昔单抗治疗非小细胞肺癌的临床疗效

目的：探讨西妥昔单抗治疗非小细胞肺癌患者的临床疗效.方法：收集2007年1月～2008年1月在我院住院治疗的非小细胞肺癌的患者80例,实验组（n=40）给予西妥昔单抗＋顺铂＋紫杉醇;对照组（n=40,顺铂＋紫杉醇.记录治疗前和治疗两个月后的影像、临床资料;观察并记录病人的生存情况和不良反应.结果：影像学检查完全缓解（comlete response,CR）两组均无,部分缓解（partial response,PR）的病人实验组中有10人,对照组有2人,P =0.012;而治疗过程中出现影像学上进展的患者实验组中有8人,对照组组有14人,P =0.133.实验组症状缓解率为26/40,对照组为14/40 ,P = 0.025.结论：西妥昔单抗可安全、有效地用于非小细胞肺癌患者的治疗.临床应用呈现出高临床受益率、高抗肿瘤活性和高安全性的特点,值得临床进一步推广验证.     

黄芪、丹参、山药及其复方对高糖所致雪旺细胞凋亡的保护作用

目的:观察中药对高葡萄糖条件下与内皮细胞(以下简称EC)共培养的雪旺细胞(以下简称SC)凋亡的干预作用。方法:建立大鼠SC与EC的共培养模型,根据存活率(形态学和MTT)筛选药物最有效作用浓度。将细胞分为正常共培养SC组、高糖共培养SC组、高糖黄芪组、高糖丹参组、高糖山药组、高糖复方组,通过凋亡率(流式细胞仪)和凋亡相关基因Bcl-2和Casepase-3的mRNA(Realtime PCR)和蛋白(Western Blot)的表达观察细胞凋亡。结果:与正常共培养组相比高糖共培养组SC凋亡率明显增高、Bcl-2mRNA和蛋白表达量明显减少,Casepase-3mRNA和蛋白表达量显著增加。加中药干预后SC凋亡率都明显降低,Bcl-2mRNA和蛋白表达量都明显增加,除高糖山药组Casepase-3mRNA减少和高糖丹参组Casepase-3蛋白减少无明显统计学意义,其余各组Casepase-3mRNA和蛋白表达量均显著减少。中药干预组之间比较,高糖复方组作用最显著。中药干预组与正常组相比,SC凋亡率无明显增高,Bcl-2mRNA和蛋白表达量明显减少,Casepase-3mRNA和蛋白表达量显著增加。结论:中药对高糖环境下与内皮细胞共培养的雪旺细胞的凋亡有保护作用,不同中药作用效果不同,复方效果最佳。     

药理实验室绿色环保化建设探讨

实现药理实验室绿色化是药理实验教学和科研人员所面对的新课题。本文探讨了目前高校药理实验室存在的主要问题,并从实验教学、实验准备和实验室管理等几个方面讨论了构建绿色药理实验平台的重要性及实施的主要措施,从而进一步提高师生的绿色实验意识。     

Casticin prevents DSS induced ulcerative colitis in mice through inhibitions of NF‐κB pathway and ROS signaling

Casticin, a compound purified from the Chinese herb Viticis Fructus, has been proven effective in preventing tumor progression in previous studies. Ulcerative colitis (UC) is a common inflammatory bowel disease that affects millions of people worldwide, but no effective and safe drugs are available. In this study, we aimed to study how did casticin affect UC by evaluating its effects on dextran sulfate sodium (DSS)‐induced colitis in mice. Our data suggested that casticin attenuated body weight loss, colon length shortening, and pathological damage in the colon of DSS‐treated mice. Casticin decreased reactive oxygen species level and chemocytokines (IL‐1β, IL‐6, TNF‐α) productions in colon tissue. The decreased reactive oxygen species level and suppressed proinflammatory cytokines productions were also confirmed in casticin‐treated LPS‐stimulated RAW264.7 cells and hydrogen peroxide‐treated CACO‐2 cells in vitro. Mechanistically, casticin treatment prevented the profound activation of AKT signaling caused by DSS administration. And casticin inhibited the productions of proinflammatory chemocytokines through downregulating AKT/NF‐κB pathway in macrophages. Meanwhile, data revealed that casticin increased expressions of endogenous antioxidants peroxiredoxin 3 and MnSOD were through activation in FOXO3α signaling by downregulating AKT signaling in colon epithelium cells. Our findings demonstrated that casticin alleviated DSS‐induced UC by increasing the antioxidant enzyme peroxiredoxin 3 and MnSOD expressions, and decreasing the production of proinflammatory chemocytokines through inhibition of AKT signaling.     

麝香酮对氰化钠加缺糖致PC12细胞缺血损伤的保护作用

目的:研究麝香酮对PC12细胞缺血损伤的影响。方法:在离体培养的PC12细胞,用NaCN加缺糖造成拟缺血损伤模型,通过细胞形态学观察、MTT微量比色、培养介质LDH活力测定,研究了麝香酮对该模型的保护作用。结果:10-7~510-5mol/L范围内,麝香酮呈浓度依赖性地降低NaCN加缺糖造成拟缺血损伤模型培养介质内LDH的释放,其IC50为:43.33μmol/L。在10-7~510-5mol/L范围内,麝香酮呈浓度依赖性地增加NaCN加缺糖造成拟缺血损伤模型培养介质的MTT比色值,其IC50为30.62μmol/L。结论:麝香酮对PC12细胞缺血损伤具有保护作用。