Evaluation of a soybean product fujiflavone P40 as an antiosteoporotic agent in rats

The preventive effects of Fujiflavone P40 (a soybean isoflavone product) against both bone loss and periodontal alteration were evaluated using an ovariectomized rat model. Rats were divided into five groups: sham-operated (Sham), ovariectomized (OVX), OVX given Fujiflavone P40, OVX given 17beta-oestradiol, and OVX given the vehicle for 17beta-oestradiol, respectively. Fujiflavone P40 contains 46.6% isoflavones which consist of 24.1% daidzin, 16.5% glycitin and 5.9% genistin. Administration of Fujiflavone P40 to OVX rats suppressed the body weight gain until 5 weeks. Fujiflavone P40 also decreased total and high-density lipoprotein (HDL) cholesterols and triglyceride level of OVX rats, significantly. After 7 weeks, Fujiflavone P40 did not recover the coarsened fibre of the periodontal ligament. The ovariectomy decreased the uterine weight by 78%. The administration of 17beta -oestradiol recovered the weight loss by 99%, while Fujiflavone P40 restored it by 33%. The ovariectomy decreased the tibial bone mineral density (BMD) by 22%. The administration of 17beta-oestradiol to OVX rats recovered the tibial BMD decrease by 100%, while Fujiflavone P40 recovered it by 78%. The results suggest that Fujiflavone P40 may be useful as a preventive agent for osteoporosis.     

低水平大豆异黄酮对血清脂蛋白氧化修饰的影响

目的 :　评价低水平 (0 .5～ 1 0μmol/L)大豆异黄酮组分 (染料木素、大豆素和染料木甙 )对血清脂蛋白氧化修饰过程作用的效果及其特点。方法 :　采用 Cu2 +诱导全血清脂蛋白氧化修饰模型 ,通过检测体系中共轭双烯和硫代巴比妥酸反应物质 (TBARS)生成量变化反映异黄酮组分对脂蛋白氧化修饰过程和结局的影响。结果 :　启动氧化前向血清脂蛋白体系中加入 0 .5～1 0 μmol/L的染料木素、大豆素或染料木甙和 α-生育酚均显著减少共轭双烯和 TBARS的生成 ,并存在剂量相关关系。当血清脂蛋白氧化启动后 ,加入 1 0μmol/L异黄酮组分仍显示有较强的抑制作用 ,只是作用强度比启动前加入时减弱 ;而相同浓度的α-生育酚仅对共轭双烯生成显示有一定抑制作用 ,对 TBARS生成甚至呈现促进趋势。结论 :　低水平异黄酮组分即能对血清脂蛋白氧化修饰产生抑制作用 ,且在氧化启动后的效果优于 α-生育酚     

大孔吸附树脂纯化葛花总异黄酮工艺研究

目的:筛选分离葛花总异黄酮的最佳树脂,并对影响分离的各种因素进行系统的研究,使分离工艺达到最优化.方?浇 法:研究7种不同类型吸附树脂对葛花总异黄酮的吸附特性,用紫外分光光度法测定葛花总异黄酮的含量对工艺进行评价.结果:AB-8型大孔树脂对葛花总异黄酮的吸附性能较好,其吸附纯化条件为葛花提取物上样浓度为3.0 mg·mL-1,吸附流速为2BV·h(树脂床体积),以60%乙醇作为洗脱剂进行洗脱效果最佳.经AB-8处理后的葛花总异黄酮含量可达50%以上.结论:该法简单可行,分离效果好,能满足于大生产的要求.     

植物性雌激素异黄酮与乳腺癌相关性的Meta分析

目的:收集植物性雌激素异黄酮与乳腺癌发病风险的文献,并对文献进行统计学Meta分析,探讨植物性雌激素异黄酮与乳腺癌的相关性。方法:以"异黄酮、大豆和乳腺肿瘤"等为关键词,检索CHKD期刊全文数据库、中国生物医学文献数据库(CBM)和medline,收集2001-2011年发表的植物性雌激素异黄酮与乳腺癌发病风险的文献。应用统计学软件对文献数据进行统计分析。结果:共7项研究被纳入分析。7项研究存在异质性(Q=1.84,P=0.000),采用随机效应模型进行合并计算,豆制品的合并RR值为0.73,95%CI=0.58～0.94。对分析结果进行偏倚分析显示,漏斗图中各研究因素分布基本对称,无发表偏倚。结论:对这7项研究数据分析后显示,植物性雌激素异黄酮可能是乳腺癌的保护性因素,异黄酮的摄入可以降低乳腺癌发病风险。     

大豆异黄酮对急性衰老小鼠学习记忆障碍的改善作用

目的 研究大豆异黄酮对D-半乳糖所致急性衰老小鼠学习记忆障碍保护作用及其作用机理.方法 皮下注射D-半乳糖 150 mg/d共6周,实验组腹腔注射大豆异黄酮0.3、0.6、0.9 mg/kg共6周后,用跳台、避暗等实验方法测定小鼠学习记忆能力,同时测定小鼠脑内乙酰胆碱脂酶(AchE)及脑B型单胺氧化酶(MAO-B)的含量.结果 D-半乳糖所致急性衰老小鼠记忆能力明显降低,表现为避暗、跳台实验的错误次数明显增加,以及增加脑B型单胺氧化酶含量及脑内AchE的含量,大豆异黄酮各剂量组能够减少小鼠电击次数(错误次数),24 h重复实验,可延长跳下平台的潜伏期及进入暗箱的潜伏期,错误次数明显减少.同时降低了脑内AchE和MAO-B.结论 大豆异黄酮对D-半乳糖所致痴呆小鼠学习记忆障碍具有保护作用,能增强学习记忆能力,可能和大豆异黄酮具有抗氧化能力、能降低脑内AchE活性有关.     

大孔吸附树脂纯化射干总异黄酮的工艺考察

目的：筛选分离射干总异黄酮的最佳树脂,并对影响分离的各种因素进行系统的研究,使分离工艺达到最优化.方法：研究7种不同类型吸附树脂对射干总异黄酮的吸附特性,用紫外分光光度法测定射干总异黄酮的含量对工艺进行评价.结果：AB-8型大孔树脂对射干总异黄酮的吸附性能较好,其吸附纯化条件为射干提取物上样浓度为4.0 mg·mL^-1,吸附流速为2 BV·h^-1.（树脂床体积）,以60%乙醇作为洗脱剂进行洗脱效果最佳.经AB-8处理后的射干总异黄酮含量可达60%以上.结论：该法简单可行,分离效果好,能满足于大生产的要求.     

保健食品中大豆异黄酮测定方法研究

目的建立高效液相色谱法测定食品中D、G、De、Ge含量的方法,探讨样品测定的影响因素。方法样品用甲醇+水(80+20,v/v)超声提取30 m in,离心定容后过0.45μm滤膜,经200×4.6 mm,5μm的C18柱分离,以甲醇+水(60+40,v/v)作流动相,时间程序洗脱,紫外检测器以波长程序测定,测定时间只需15 m in,D、G、De、Ge分离良好。结果样品的加标回收率为90.2%-108.4%,RSD在0.93%-5.2%之间。结论该方法前处理简单,准确快速,可作为同时测定保健食品中四种大豆异黄酮含量的方法。     

Alcohol consumption‐associated breast cancer incidence and potential effect modifiers: the Japan Public Health Center‐based Prospective Study

Epidemiological studies have evaluated whether the impact of alcohol intake on breast cancer risk is modified by use of exogenous estrogens, folate intake, body weight and smoking status, but results have been inconsistent. Further, effect modification by intake of isoflavones and alcohol‐induced facial flushing, which are prevalent in Asian populations, have not been investigated. We investigated the association between alcohol intake and breast cancer risk and whether the association is modified by these factors among 50,757 premenopausal and postmenopausal women (aged 40–69 years) in the population‐based Japan Public Health Center‐based Prospective Study. Alcohol consumption and other related factors were assessed using self‐reported questionnaires. Through to the end of 2006, 572 patients were identified. Relative risks (RRs) and 95% confidence intervals (CIs) were estimated by hazard ratios derived from Cox proportional hazards regression models. Compared with never‐drinkers, regular alcohol drinkers (>150 g of ethanol/week) had a higher risk of the development of breast cancer; the multivariable‐adjusted RRs were 1.75 (95% CI = 1.16–2.65; p_trend = 0.035) for overall, 1.78 (95% CI = 1.09–2.90) for premenopausal and 1.21 (95% CI = 0.53–2.75) for postmenopausal women. There was no statistical evidence for effect modification by menopausal status, use of exogenous estrogens, intakes of isoflavone and folate, body weight, alcohol‐induced facial flushing or smoking (All p_interactions ≥ 0.15). Excessive alcohol intake was associated with an increase in the risk of breast cancer in this population. There was no statistical evidence for effect modification.     

丰城鸡血藤异黄酮类化合物的分离鉴定

为建立丰城鸡血藤质量控制方法提供对照品, 对其化学成分进行了研究, 从中分离鉴定了8个化合物, 分别为丰城鸡血藤异黄酮苷F (1), 芒柄花素 (2), 芒柄花苷 (3), 奥刀拉亭7-O-β-D-吡喃葡萄糖苷 (4), 澳白檀苷 (5), 阿夫罗摩辛 (6), 圆荚草双糖苷 (7) 和丰城鸡血藤异黄酮苷B (8)。化合物1为新化合物, 化合物3～5和7为首次从本属植物中分离得到, 2为首次从本植物中分离得到。     

抗骨质疏松药依普黄酮的合成

目的合成制备新型抗骨质疏松药依普黄酮 ,改进产品及中间体的合成和纯化工艺条件。方法以间苯二酚和苯乙酸为原料 ,经酰化、环合及醚化三步反应进行合成。在酰化反应中 ,探讨了三种原料的摩尔比 ,改进了中间体的分离纯化工艺。在环合反应中 ,选用三氯氧磷和二甲基甲酰胺为环合试剂。结果合成品质量和收率符合文献要求。结论本文报道的合成工艺 ,原料易得、反应条件温和、工艺路线简便易行