A beverage of Asiatic plantain extracts alleviated postprandial oxidative stress in overweight hyperlipidemic subjects challenged with a high-fat meal: a preliminary study

There is emerging interest in the potential of the phenolic compounds of Asiatic plantain (Plantago asiatica L.) to attenuate in vitro and in vivo oxidative stress. We hypothesized that a single administration of Asiatic plantain beverage may exert protective effects against postprandial oxidative stress. This preliminary study was designed to compare the ability of different doses of Asiatic plantain beverage to mitigate the postprandial effects of a high-fat meal on the oxidation of lipids and DNA in overweight hyperlipidemic subjects. In a randomized, double-blind, placebo-controlled parallel design (n = 10/group), 40 subjects were administered a single high-fat meal with either a placebo or 1 of 3 Asiatic plantain extract beverages (low, intermediate, or high dose). Blood samples were obtained at fasting and 60, 120, 240, and 360 minutes (total of 5 samples) after intervention. The data showed a tendency for plasma free fatty acid levels to decrease in response to high-dose Asiatic plantain at all time points. Plasma oxidized low-density lipoprotein levels were significantly reduced with high-dose Asiatic plantain at 120 minutes (P = .0251 vs placebo). A comet assay revealed that DNA damage in lymphocytes was significantly decreased by Asiatic plantain at 360 minutes (P = .0225 vs placebo). There were no treatment differences in triglyceride or malondialdehyde levels. The maximum suppression was achieved with a high dose (20 g Asiatic plantain extract/80 mL). These results suggest that by protecting low-density lipoprotein and DNA, an Asiatic plantain beverage may be useful to enhance antioxidant.     

伊贝沙坦治疗轻中度高血压疗效和安全性的临床研究

目的　为评价新一代血管紧张素ⅡAT1受体拮抗剂伊贝沙坦 (安博维 )降压疗效及安全性 ,并与氯沙坦相比较。方法　采用随机分组平行对照方法 ,将 12 0例轻、中度高血压患者分成伊贝沙坦组(6 0例 ) ,口服 15 0mg·d- 1和氯沙坦组 (6 0例 ) ,口服 5 0mg·d- 1。观察 8周。每 2周一次上午延迟 1～ 4小时用药并测诊室谷值坐位血压、心率 ,并观察不良反应。用药前及治疗第 4周和第 8周检测血液生化。第 4周谷值坐位血压仍大于 90mmHg者加用双氢克尿噻 12 5mg·d- 1。结果　第 4周伊贝沙坦与氯沙坦正常化率分别为 4 0 %和 35 % ,第 8周伊贝沙坦与氯沙坦组血压有效反应率分别为 78 3%和6 6 7% ,(P >0 0 5 )。两组治疗前、后平均谷值坐位舒张压有显著性差异P <0 0 1。伊贝沙坦组不良反应发生率 6 6 % ,氯沙坦组为 8 3% (P >0 0 5 )。两组部分病例加用小剂量双氢克尿噻后 ,谷值坐位舒张压进一步下降。谷值坐位舒张压下降幅度 ,伊贝沙坦组优于氯沙坦组 ,P <0 0 5。结论　伊贝沙坦与氯沙坦不良反应发生率均较低 ,伊贝沙坦降低谷值坐位舒张压更有效。建议生产伊贝沙坦与小剂量双氢克尿噻的复方制剂     

作业场所空气中磷酸二丁酯采样方法研究

目的研究作业场所空气中磷酸二丁酯（DBP）的采样监测方法。方法用粉尘采样器采集空气于采样材料中,用溶剂洗脱,取适量洗脱液经硅烷化衍生后作毛细管柱气相色谱分析,研究DBP采样监测的条件。结果采样材料选择过氯乙烯微孔滤膜或丙纶测尘滤膜,使用采样器以5—10L／min流速采集25～50L空气,以乙腈浸泡洗脱滤膜30min最佳,洗脱效率99．0％-101．5％,采样稳定性和溶液稳定性好,7d下降率〈1％,方法的最低检测浓度可达0．005mg／m3,磷酸三丁酯等4种可能干扰物质对DBP的测定不造成影H向。结论该方法适合作业场所空气中DBP的采样监测要求。     

Lipoprotein (a), metabolic syndrome and coronary calcium score in a large occupational cohort

Background and aimsWhether lipoprotein (a) [Lp(a)] concentration is associated with metabolic syndrome (MetS) and pre-clinical atherosclerosis in different ethnic groups is uncertain. The association between Lp(a), MetS and a measure of pre-clinical atherosclerosis was studied in a large Asian cohort.Methods and resultsData were analyzed from a South Korean occupational cohort who underwent a cardiac computed tomography (CT) estimation of CAC score and measurements of cardiovascular risk factors (n = 14,583 people). The key exposure was an Lp(a) concentration in the top quartile (>38.64 mg/dL)) with a CAC score >0 as the outcome variable and measure of pre-clinical atherosclerosis. Logistic regression was used to describe the associations. 1462 participants had a CAC score >0. In the lowest Lp(a) quartile (<11.29 mg/dL), 25.8% had MetS, compared with 16.1% in the highest Lp(a) quartile (>38.64 mg/dL (p < 0.001). MetS, and component features, were inversely related to Lp(a) concentration (all p < 0.0001). In the highest Lp(a) quartile group, there was an association between Lp(a) and CAC score >0 in men (OR 1.21[1.05, 1.40], p = 0.008), and women (OR 1.62[1.03, 2.55], p = 0.038), after adjustment for age, sex, lipid lowering therapy, and multiple cardiovascular risk factors. There was no evidence of an interaction between highest quartile Lp(a) and either high LDLc (>147 mg/dL) (p = 0.99), or MetS (p = 0.84) on the association with CAC score >0.ConclusionLp(a) levels are inversely related to MetS and its components. There was a robust association between Lp(a) concentration >38.6 mg/dL and marker of early atherosclerosis in both men and women, regardless of LDLc, level MetS or other cardiovascular risk factors.