肾小球内源性抗氧化酶在阿霉素肾病机理中的作用

为探讨阿霉素肾病的发病机理,本文研究了阿霉素肾病（ＡＮ）大鼠肾小球内源性抗氧化酶（ＡＯＥ）活性及其与肾小球损害的关系,发现ＡＮ大鼠肾小球内源性ＡＯＥ活性明显低于正常大鼠（Ｐ〉０．０１）,而肾小球脂质过氧化水平明显高于正常大鼠。作者认为,ＡＮ的发病机理可能是由于活性氧簇产生增多和／或肾小球内源性抗氧化酶活性降低的结果。     

Acute60Co-gamma irradiation of rats decreases the inhibitory effect of succinate on the lipid peroxidation of liver mitochondria

Summary Succinate inhibits NADPH-dependent lipid peroxidation of liver mitochondria. This effect of succinate decreased 12 h after whole-body⁶⁰Co-gamma irradiation, depending on the dose of irradiation.     

Inhibition of lipid peroxidation by diterpenoid fromPodocarpus nagi

A diterpenoid, totarol (1), fromPodocarpus nagi was evaluated as an antioxidant. This diterpenoid inhibited autoxidation of linoleic acid. Mitochondrial and microsomal lipid peroxidation induced by Fe(III)-ADP/NADH or Fe(III)-ADP/NADPH were also inhibited. Nagilactone E (2), a norditerpene lactone isolated from the same source, had no antioxidative activity. Furthermore, totarol protected red cells against oxidative hemolysis. This diterpene was shown to be effective in protecting biological systems against oxidative stresses.     

Short cerebral ischemia and subsequent reperfusion and treatment with stobadine

Lipid peroxidation and activities of antioxidative enzymes were studied in the brain cortex after short (15 min) cerebral ischemia and reperfusion (10 min) in rats. Conjugated dienes (CD) and thiobarbituric acid-reactive substances (TBARS) were significantly elevated in the group of rats with ischemia followed by reperfusion in comparison to the ischemic animals. Superoxide dismutase (SOD) activity significantly increased in the group of animals with ischemia and reperfusion. No significant changes in the activities of glutathione peroxidase (GP) were observed. Stobadine administered before ischemia or before reperfusion decreased the level of TBARS. Stobadine probably prevents malondialdehyde (MDA) formation from hydroperoxide or might elevate the activity of aldehyde dehydrogenase. In contradiction to the findings after long-lasting (4 h) ischemia and subsequent reperfusion¹, no decrease in the concentration of CD or in the activity of SOD or GP was found.     

Identification of high-lipid producers for biodiesel production from forty-three green algal isolates in China

To identify some desirable algal strains for our future research and/or the production of algae-based biofuel,43 green algal strains were successfully isolated from Chinese freshwaters,and then incubated in the laboratory bioreactors for the growth and oil accumulation investigations.During a 15 d incubation experiment,the accumulations of their biomass and total lipids,together with the lipid productivities for these green algal strains were systematically investigated and compared.Results indicated tha...     

壳寡糖及其衍生物对糖尿病大鼠血脂代谢紊乱的影响及对肝脏的保护作用

目的:研究壳寡糖,N-乙酰氨基单糖对糖尿病大鼠的血脂的影响和对肝脏的保护作用.方法:腹腔注射STZ制备糖尿病大鼠模型,连续60 d灌胃壳寡糖和N-乙酰氨基单糖水溶液,研究壳寡糖,N-乙酰氨基单糖对链脲佐菌素诱导的糖尿病大鼠降低餐后2 h血糖的作用.并对血脂和肝功能等指标进行测定,肝脏做病理组织学检查.结果:壳寡糖,N-乙酰氨基单糖能不同程度的改善糖尿病大鼠的体重减轻、多饮、多食等症状,降低餐后2 h血糖值和尿糖.壳寡糖,N-乙酰氨基单糖可以显著降低血清中载脂蛋白B、谷丙转氨酶、谷草转氨酶、总胆红素、间接胆红素、N-乙酰氨基葡萄糖苷酶的浓度,并提高血清中载脂A1/载脂B、总蛋白、白蛋白、球蛋白、白球比、谷草/谷丙比值.不同剂量的壳寡糖,N-乙酰氨基单糖对肝脏均有保护作用.结论:壳寡糖和N-乙酰氨基单糖可以应用于糖尿病肝病的治疗.     

金/硫醇-类脂双层膜的研究进展

综述了金支撑的硫醇类脂混合双层膜的结构、性质及其上的电子跨膜传递机理研究的进展情况,并对其发展前景进行了展望.     

取代度对硫酸酯化虎奶多糖抗氧化活性的影响

通过对一种真菌虎奶多糖 (HNP)的硫酸酯化修饰 ,合成了取代度分别为 0 .39和 0 .5 5的两种硫酸酯化虎奶多糖S1 HNP和S2 HNP .讨论了S1 HNP和S2 HNP对Fe2 Vc致鼠肝线粒体TBARS含量增加的抑制作用 ,对CCl4 诱导的肝脂质过氧化的保护作用 ,及对CuSO4 Phen Vc H2 O2 DNA体系中·OH导致的DNA损伤化学发光峰的抑制作用差异 .结果表明 ,S1 HNP比S2 HNP具有较高的抗氧化活性