白藜芦醇对耐力训练小鼠抗氧化能力的影响

研究白藜芦醇对耐力训练小鼠抗氧化能力和线粒体游离钙含量的影响．选用昆明小鼠，根据体重将72只小鼠随机分为三组：A组为安静对照组；B组为耐力训练组；C组为耐力训练＋白藜芦醇组．C组小鼠每日给予白藜芦醇10mg／kg灌胃，与B组共同进行6w递增负荷游泳训练，再进行力竭游泳实验．力竭游泳后24h处死小鼠取材，测定小鼠骨骼肌、心脏、胸腺，脾脏、肾脏、肝脏线粒体和红细胞SOD、GSH-Px活性及MDA含量。以及肝脏线粒体游离钙的含量．6w递增负荷耐力训练后，B组小鼠骨骼肌、心肌、肝脏线粒体、脾脏、胸腺和红细胞SOD活性，心肌、脾脏和红细胞的GSH—Px活性均显著低于A组（P〈0．05），同时骨骼肌、肝脏线粒体、脾脏和红细胞的MDA含量显著高于A组（P〈0．05）。肝脏线粒体游离钙含量显著高于A组（P〈0．05）；白藜芦醇干预使C组小鼠骨骼肌、肝脏线粒体和脾脏SOD活性，骨骼肌和心肌的GSH—Px活性显著高于B组（P〈0．05），同时骨骼肌、肝脏线粒体、胸腺和红细胞的MDA含量显著低于B组（P〈0．05）；肝脏线粒体游离钙含量显著低于B组（P〈0．05）．提示白藜芦醇一定程度上能提高耐力训练小鼠抗氧化能力，维持线粒体游离钙含量在正常水平，具有延缓运动性疲劳发生的作用．     

DMAP催化合成白藜芦醇烟酸酯

目的：以烟酸、白藜芦醇为原料,采用DMAP催化合成方法制备白藜芦醇烟酸酯,期望寻找优化的白藜芦醇烟酸酯合成路线。方法：以烟酸、白藜芦醇为起始原料,经酰氯化、DMAP催化成酯等反应,得到目标化舍物。结论：通过本实验工艺路线合成白藜芦醇烟酸酯,产率90．3％,成酯反应时问比传统方法缩短一半。产物经过1R、1H—NMR等进行了表征。     

白藜芦醇和硝普钠对月季切花的保鲜效应

为筛选出高效、低毒、无污染的月季切花保鲜剂,试验探讨了白藜芦醇和外源NO供体硝普钠对月季切花保鲜的影响。结果表明：含有50μmol·L^-1白藜芦醇和100μmol·L^-1硝普钠的保鲜剂均能有效调节切花水分平衡,改善切花体内的水分状况,减轻细胞质膜透性,降低膜脂过氧化水平,从而延缓切花衰老进程,延长瓶插寿命。对白藜芦醇和硝普钠保鲜效应的机理进行了初步探讨。     

高效液相色谱法测定不同产地虎杖中白藜芦醇的含量

采用高效液相色谱法测定不同产地虎杖中白藜芦醇的含量。结果表明,虎杖中白藜芦醇含量最高达到0.412%,最低为0.186%,不同产地虎杖的品质有一定的差异。     

Bioactive compounds of the Mediterranean diet and prostate cancer

Abstract

Objective: The purpose of this review is to examine the evidence on the effects of bioactive constituents of the Mediterranean diet (MeDi) on prostate cancer (PCa) risk.

Methods: The search for articles came from extensive research in the following databases: PubMed, Scopus, and Web of Science. We used the search terms “Mediterranean diet,” “lycopene,” “vitamin E,” “vitamin C,” “Selenium,” “resveratrol,” “prostate cancer,” and combinations, such as “lycopene and prostate cancer” or “resveratrol and prostate cancer.”

Results: Numerous studies investigating the effect of various dietary nutrients on PCa have suggested that selenium is probably the most promising. Several studies reported reduced PCa risk associated with vitamin C and E intake, while other studies reported no association. Lycopene inhibits cell proliferation and inducts apoptosis, thus protecting against cancer. Also, it has been found in various in vivo and in vitro studies that resveratrol, inhibits PCa development.

Conclusions: The high content of bioactive phytochemicals in the MeDi is of particular interest in the prevention of PCa. Further large-scale studies are required to clarify the effect of MeDi bioactive compounds on prostate health, in order to establish the role of this diet in the prevention of PCa.