葛根宝软胶囊的质量标准研究

目的研究葛根宝软胶囊的质量控制标准。方法采用TLC法对制剂中葛根素和大豆苷元进行定性鉴别,采用HPLC法测定葛根素和大豆苷元的含量。结果葛根素、大豆苷元的薄层色谱鉴别专属性强;葛根素在0.214～1.42μg范围内、大豆苷元在0.033～0.221μg范围内呈良好的线性关系,平均回收率分别为101.5%和96.6%,RSD分别为1.6%和1.8%(n=6)。结论所用方法简便、准确,可做为葛根宝软胶囊的质量控制标准。     

ChAT表达激活剂的筛选及其机制研究

目的：利用ChAT启动子荧光素酶报告系统对中药小分子化合物进行筛选,以期找到能够促进ChAT表达的化合物。方法用构建的ChAT启动子荧光素酶报告体系从400余种中药小分子化合物中筛选ChAT启动子激活剂,并用RT-PCR和WesternBlot方法对筛选得到的小分子化合物进行验证。利用免疫印迹法分析筛选得到的化合物对细胞内信号通路的影响。结果通过筛选发现大豆甙元能够激活ChAT启动子的活性,与对照相比具有显著性差异（P＜0．05）。进一步研究结果显示,大豆甙元也可以促进ChATmRNA和蛋白的表达。另外,大豆甙元能够促进细胞内ERK的磷酸化,并进而激活ERK/MAPK信号通路。结论大豆甙元能够促进ChAT基因的表达,并引起细胞内ERK/MAPK信号通路的改变。     

大豆黄酮玻璃体腔注射对大鼠视神经损伤的影响

目的：大豆黄酮(Daidzein)玻璃体腔内注射是否对视神经急性损伤有保护和修复作用。

方法：SD雄性大鼠72只,建立大鼠急性视神经钳夹损伤模型,随机分为正常组、PBS阴性对照组、大豆黄酮治疗组(10μmol/L,100μmol/L,1 000μmol/L)、鼠神经生长因子(mNGF,100ng/mL)阳性对照组; 玻璃体内注射3d后处死各组大鼠,用组织病理(HE)、免疫组化检测以及Western Blot分析来观察和评价视网膜形态变化及进行各组间视网膜Caspase-3蛋白和GAP-43蛋白表达的比较。

结果：与正常组和阴性对照组相比,不同浓度的大豆黄酮各治疗组和阳性对照组的视网膜形态结构较完整,Caspase-3蛋白的表达相对降低,GAP-43蛋白的表达相对较高,其差异有统计学意义(P<0.05)。

结论：大豆黄酮玻璃体腔注射对大鼠急性视神经损伤具有修复和保护作用。     

梯度洗脱HPLC法测定舒肝降脂胶囊中葛根素大豆苷及大豆苷元的含量

目的建立梯度洗脱测定舒肝降脂胶囊中葛根素、大豆苷及大豆苷元的含量测定方法。方法检测波长为250nm;流速0．9ml／min;色谱柱为Kromasil ODS（250mm×4．6mm,5μm）;流动相为甲醇水混合体系。结果葛根素、大豆苷和大豆苷元线性范围分别是：4．08～81．6μg·ml^-1（r=0．9999）;2．2～44．0μg·ml^-1（r=0．9999）;2．08～41．6μg·ml^-1（r=0．9999）。平均加样回收率分别为101．6％、101．2％、98．3％。结论本方法准确、可靠,可用于本品的质量控制。     

大豆异黄酮类成分对去卵巢大鼠脂质代谢的影响

目的:观察大豆异黄酮中主要成分染料木素(genistein,G)、大豆苷元(daidzein,D)及其苷对于去卵巢大鼠脂质代谢的影响.方法:Wistar雌性大鼠,双侧摘除卵巢,手术后1周,分为假手术组、模型组、雌激素组,大豆苷元高、中、低剂量组,染料木素高、中、低剂量组和大豆总黄酮提取物(T)高、中、低剂量组,灌胃给药3个月.每天称进食量,每周称一次体重;实验结束后,取血和肝脏,进行血清和肝脏胆固醇(TC)、甘油三酯(TG)、血清低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)的测定.结果:大豆苷元及大豆总黄酮提取物能明显抑制大鼠体重和进食量的增长(P<0.01),抑制腹部脂肪的堆积(P<0.001),染料木素无明显作用;大豆苷元降低血清中TC、LDL-C的浓度(P<0.05),对于血清中甘油三酯TG、HDL-C没有明显的作用,而染料木素可以降低LDL-C(P<0.01)且升高HDL-C(P<0.05),但对于TC、TG无作用;大豆苷元、染料木素及大豆总黄酮均能降低肝脏中TC、TG的浓度(P<0.001).结论:大豆苷元可以抑制去卵巢大鼠体重增长,减少腹部脂肪堆积,降低血浆胆固醇的升高.     

六味地黄汤加味合黄豆苷元片治疗围绝经期综合征80例临床观察

[目的]评价六味地黄汤加味合黄豆苷元片治疗围绝经期综合征的疗效。[方法]将160例患者随机分为两组,治疗组80例,应用六味地黄汤加味治疗,同时口服黄豆苷元片;对照组用更年安片治疗,3个月为1个疗程,观察临床疗效并检测血清雌二醇(E2)、促卵泡生成素(FSH)、促黄体生成素(LH)水平。[结果]治疗组对围绝经期综合征疗效显著,总有效率为93.8%,优于对照组(83.8%),两组比较有显著性差异(P0.05);且六味地黄汤加味合黄豆苷元片能升调E2水平,降低FSH、LH水平,治疗前后比较,有显著性差异(P0.O5),与对照组比较,有显著性差异(P0.O5)。[结论]六味地黄汤加味合黄豆苷元片治疗围绝经期综合征疗效明显,症状缓解率满意。     

Isoflavonoid Compounds Extracted from Pueraria lobata Suppress Alcohol Preference in a Pharmacogenetic Rat Model of Alcoholism

The extract from an edible vine, Pueraria lobata , has long been used in China to lessen alcohol intoxication. We have previously shown that daidzin, one of the major components from this plant extract, is efficacious in lowering blood alcohol levels and shortens sleep time induced by alcohol ingestion. This study was conducted to test the antidipsotropic effect of daidzin and two other major isoflavonoids, daidzein and puerarin, from Pueraria lobata administered by the oral route. An alcohol-preferring rat model, the selectively-bred P line of rats, was used for the study. All three isoflavonoid compounds were effective in suppressing voluntary alcohol consumption by the P rats. When given orally to P rats at a dose of 100 mg/kg/day, daidzein, daidzin, and puerarin decreased ethanol intake by 75%, 50%, and 40%, respectively. The decrease in alcohol consumption was accompanied by an increase in water intake, so that the total fluid volume consumed daily remained unchanged. The effects of these isoflavonoid compounds on alcohol and water intake were reversible. Suppression of alcohol consumption was evident after 1 day of administration and became maximal after 2 days. Similarly, alcohol preference returned to baseline levels 2 days after discontinuation of the isoflavonoids. Rats receiving the herbal extracts ate the same amounts of food as control animals, and they gained weight normally during the experiments. When administered orally, none of these compounds affected the activities of liver alcohol dehydrogenase and aldehyde dehydrogenase. Therefore, the reversal of alcohol preference produced by these compounds may be mediated via the CNS. Data demonstrate that isoflavonoid compounds extracted from Pueraria lobata is effective in suppressing the appetite for alcohol when taken orally, raising the possibility that other constituents of edible plants may exert similar and more potent actions.     

RP-HPLC法测定人血浆中黄豆苷元的浓度

目的:建立以反相高效液相色谱法测定人血浆中黄豆苷元浓度的方法。方法:采用甲醇沉淀蛋白法提取血浆中黄豆苷元,色谱柱为Hypersil ODS C18(250mm×4.6mm,5μm),流动相为5%乙酸溶液(用三乙胺调pH值为4)-甲醇(55∶45),检测波长为254nm,流速为1.0mL·min-1,柱温25℃。结果:黄豆苷元血药浓度在1.5～700.0ng·mL-1范围内线性关系良好(r=0.9995),低、中、高浓度(5.0、16.5、231.0ng·mL-1)的平均回收率分别为(96.95±4.36)%、(101.30±3.32)%和(98.73±2.54)%。结论:本法简单、快速、准确,可用于黄豆苷元的血药浓度测定和人体药动学研究。     

薄层扫描法测定黄豆甙元血药浓度的探讨

本文采用薄层扫描法测定血液中黄豆甙元含量,在硅胶G薄层板上用氯仿:甲醇(9:1)展层分离,然后用岛津CS-910薄层扫描仪进行定量。家兔静注黄豆甙元钠盐后,测定血药浓度经时变化,计算了黄豆甙元的药动学参数。