淫羊藿甙及其与铁离子配合物的电喷雾质谱研究

本利用多级串联电喷雾质谱(ESI-MS^n)研究了淫羊藿甙及其与铁离子形成的配合物，得到了淫羊藿甙的质谱碎裂规律，并对淫羊藿甙与铁离子形成的配合物结构进行了初步确定．结果表明；淫羊藿甙与铁离子可形成比较稳定的2:1的配合物．     

高效液相色谱化学发光法测定淫羊藿甙

在碱性条件下,研究了淫羊藿甙与Co(Ⅱ)形成的1∶1配合物催化鲁米诺-H2O2体系产生化学发光.在此基础上建立了反相高效液相色谱(RP-HPLC)分离柱后化学发光检测淫羊藿甙的新方法,并成功应用于安神补脑液中淫羊藿甙的测定.方法在0.5~20μg/mL范围内与化学发光强度呈良好的线性关系,相关系数为0.9986,检出限为2×10-7g/mL(3σ).对2×10-6g/mL淫羊藿甙平行测定11次,其相对标准偏差为4.5%.     

高效液相色谱法和薄层—紫外法测定淫羊藿中淫羊藿甙质量分数的研究

应用HPLC法测定淫羊藿中淫羊藿甙的质量分数,测得结果显示提取淫羊藿甙的质量分数与提取液关系密切,以50％乙醇提取的质量分数为最高,对同一淫羊藿药材进行质量分数测定,HPLC法操作简单,省时,分离效果好,准确度和再现性也明显优于药典的TLC－UV法。当提取方法相同时,两种方法测得的淫羊藿甙质量分数基本一致。因此,使用HPLC法也可按照药典的质量分数限度进行药材有效成分的检测工作。     

淫羊藿中有效成分淫羊藿甙分离纯化的研究

在Tween80-(NH4)2SO4液-固萃取体系中,试验了淫羊藿甙在两相的分配行为.选择Tween80浓度为9%,(NH4)2SO4浓度为1.667mol/L,萃取pH4.20,淫羊藿甙的一次萃取率可达95.2%.选择(NH4)2SO4浓度为2.121mol/L,反萃pH10.30,经一次反萃,可使94.2%的淫羊藿甙与Tween80分离.用HPLC对分离效果作了评价,结果表明,该萃取体系对淫羊藿粗提液有明显的分离纯化作用.     

淫羊藿中有效成分淫羊藿甙分离纯化的研究

在Tween 80-(NH4)2SO4液－固萃取体系中,试验了淫羊藿甙在两相的分配行为,选择Tween80浓度为9％,（NH4）2SO4浓度为1.667mol/L,萃取pH4.20,淫羊藿甙的一次萃取率可达95.2%,选择（NH4）2SO4浓度为2.121mol/L,反萃pH10.30,经一次反萃,可使94.2%的淫羊霍甙与Tween80分离,用HPLC对分离效果作了评价,结果表明,该萃取体系对淫羊藿粗提液有明显的分离纯化作用。     

多指标综合研究复方淫羊藿制剂的提取工艺

以治疗肾阳虚的补肾益寿颗粒为代表，通过Ｌ９（３）４正交试验设计，用总固体物收率、有效成分淫羊藿甙和蛇床子素含量作为考察指标，探讨了复方淫羊藿制剂水提取工艺中的几个影响因素．试验结果方差分析表明提取次数、加水量为主要影响因素．选用提取三次、加水１０倍量、每次提取１小时为最佳提取工艺条件     

HPLC法测定朝鲜淫羊藿中淫羊藿苷的质量分数

采用HPLC法对不同采收期、不同产地、不同海拔、不同药用部位的淫羊藿中淫羊藿苷的质量分数进行了测定.结果表明:淫羊藿苷在0.1~1.4 g/L范围呈良好的线性关系;不同采收期的淫羊藿叶中淫羊藿苷的质量分数为0.314 46%~3.680 99%;临江产淫羊藿中淫羊藿苷质量分数最高;海拔629 m的淫羊藿中淫羊藿苷质量分数最高;同一植株不同部位中淫羊藿苷的质量分数分布为叶地上部分茎.     

淫羊藿药用植物种质资源

通过资源调查及分类学研究,我国有淫羊藿药用植物种质资源19种,其中柔毛淫羊藿Epimediumpubescens、淫羊藿Ebrevicornu、朝鲜淫羊藿E．koreanum、巫山淫羊藿Ewushanense、箭叶淫羊藿Esagittatum为中国药典收栽种;粗毛淫羊藿Eacuminutum、天平山淫羊藿Emyrianthum、毡毛淫羊藿Ecoactum、黔岭淫羊藿E．1eptorrhizum为贵州省地方标准收栽种。黔北淫羊藿E．borealiguizhouense、毡毛淫羊藿Ecoactuln、德务淫羊藿Edewuenze为贵州特有种质资源;宝兴淫羊藿Edavidii、川西淫羊藿Eelongatum、无距淫羊藿Eecalcaratum、方氏淫羊藿E．fangii、少花淫羊藿E．pauciflorum为四川特有种质资源。     

淫羊藿总黄酮提取工艺对总黄酮和淫羊藿苷含量的影响

目的:研究不同提取方法对淫羊藿总黄酮和淫羊藿苷含量的影响.方法:以紫外分光光度法测定淫羊藿总黄酮的含量,HPLC法测淫羊藿苷的含量,通过对提取分离过程中淫羊藿总黄酮和淫羊藿苷的含量的检测,来确定提取工艺.结果:淫羊藿总黄酮的最佳提取工艺为20倍量(V/W),70%乙醇提取3次,每次0.5 h.聚酰胺对淫羊藿总黄酮的富集能力明显优于大孔树脂DHP-100,DHP-600和D101.结论:聚酰胺分离纯化工艺具有转移率高,成本低的优点,适宜用于产业化生产.     

淫羊藿保健露酒的研制及其功能评价

用热水浸提法制备淫羊藿提取液,以发酵的葡萄酒为酒基,辅以适量白砂糖和柠檬酸,研制出一种淫羊藿保健露酒.结果表明:当固液比为1∶30,浸泡1.5h,于80℃水浴4h时,淫羊藿总黄酮提取率最高;在葡萄酒中添加25.0%淫羊藿提取液、20.0%白砂糖和0.1%柠檬酸时,淫羊藿保健露酒的感官品质最好;淫羊藿保健露酒中总黄酮、淫羊藿苷、朝藿定A、朝藿定B、朝藿定C质量浓度分别为297.08、16.64、18.57、25.23、7.89mg/L;与普通葡萄酒相比,淫羊藿保健露酒的抗氧化活性更强.该生产工艺所得淫羊藿保健露酒兼具优良的感官品质及较好的保健功能.     

淫羊藿苷分子印迹聚合物吸附性能研究

以沉淀聚合法制备了淫羊藿苷分子印迹聚合物(MIPs).并用动态吸附、静态吸附和选择性吸附实验研究了制备的分子印迹聚合物对模板分子淫羊藿苷的吸附性能.结果表明制备的淫羊藿苷分子印迹聚合物对模板分子淫羊藿苷具有较好的吸附能力和识别能力,可以作为固相萃取材料来分离提取中草药淫羊藿中的淫羊藿苷.     

淫羊藿苷与脱水淫羊藿素的体外抗氧化研究

为研究淫羊藿苷和脱水淫羊藿素的体外抗氧化活性,分别测定了两者对1,1-二苯基-2-苦苯肼自由基(DPPH.)、超氧阴离子自由基(O2.)、羟自由基(OH.)的清除能力、对脂质过氧化的抑制能力、还原力以及总抗氧化能力.实验结果表明,淫羊藿苷具有很强的清除DPPH.、超氧阴离子自由基,还原力和总抗氧化的能力,有较强的清除OH.的能力,且均呈剂量依赖性.脱水淫羊藿素对DPPH.的清除能力很强,对OH.、超氧阴离子和脂质过氧化有较强的清除和抑制作用,表明淫羊藿苷和脱水淫羊藿素具有明显的抗氧化活性.     

淫羊藿苷与过氧化氢酶相互作用的荧光光谱法和分子对接研究

利用过氧化氢酶的内源荧光,通过荧光光谱法对淫羊藿苷与过氧化氢酶的相互作用进行了研究.结果表明,淫羊藿苷主要以静电作用力与过氧化氢酶发生相互作用,16℃时结合常数和结合位点数分别为4.59×104 L/mol和1.00.根据F（o）rster非辐射能量转移理论,计算二者相互作用的结合距离为4.05 nm.对二者之间的相互作用进行了分子模拟,表明淫羊藿苷在过氧化氢酶4个亚基的中心区域通过静电作用力、疏水作用力和氢键作用力与过氧化氢酶发生相互作用,与荧光光谱法的研究结果相一致.     

A new bone repair scaffold combined with chitosan/ hydroxyapatite and sustained releasing icariin

Icariin, a plant-derived flavonol glycoside, has been proved as an osteoinductive agent for bone tissue engineering. A new bone repair scaffold was generated by thorough mixing of icariin and chitosan/ hydroxyapatite （icariin-CS/HA） using freeze-drying technigue. Characteristics of morphology, mechanical properties, biocompatibility, drug release behavior and bone repair abilities in vivo were evaluated. The results show that drug loading process of icariin did not affect physical structure of CS/HA composite significantly but decreased mechanical properies of CS/HA composite, which happened with a high dosage; icariin-CS/HA had favorable cell compatibility and promoted osteogenic differentiation of hBMSCs; the controlled release of icariin was satisfactory and the release retained after 90 d in vitro. In addition, icariin-CS/HA scaffolds had favorable osteoconduction and osteoinduction in vivo, and could fill bone defect sites and stimulate newborn bone tissues formation at early stage. On the basis of these data, icariin-CS/HA is believed to be an optical bone repair scaffold for tissue engineering.     

Icariin suppresses bone resorption activity of rabbit osteoclasts in vitro

The effect of icariin on the bone resorption activity of rabbit osteoclasts is assessed in vitro. Osteoclasts were isolated from Japanese white rabbits and cultured on plates with a sterilized bone slice in each well. After treatment with icariin at various concentrations, the bone resorption activity of osteoclasts was evaluated by examining pit areas, superoxide anion (·O2-) generation, size and number of actin rings and intracellular calcium concentration [Ca2 ]i. As revealed by these data, icariin elicited continuous decline of [Ca2 ]i, making actin ring constricted and ·O2- generation decreased. These events resulted in smaller and fewer pits which indicate suppressed bone resorption activity of rabbit osteoclasts by icariin.     

肤舒止痒膏的高效液相色谱分析

为更好地体现和控制肤舒止痒膏的质量,本试验采用高效液相色谱法同时测定方中朝藿定C和淫羊藿苷的含量,建立其质量标准。结果显示:朝藿定C和淫羊藿苷分别在0.088～0.44μg(r=0.9999)和0.01616～0.0808μg(r=0.9998)范围内呈良好的线性关系,平均回收率分别为:98.23%(RSD=1.95%)和97.71%(RSD=1.81%)。表明该法简捷、准确、重现性好。     

胶束毛细管电泳法测定安神补脑液中淫羊藿甙的含量

胶束毛细管电泳法测定安神补脑液中淫羊藿甙的含量＊＊收稿日期：１９９７－０９－１０本文第一作者：男，３４岁，副教授河北省自然科学基金资助项目２９７００６９（项目批准号）杨更亮王德先张红医胡之德孙汉文（化学系）安神补脑液由干姜、鹿茸、何首乌、淫羊藿等六味...     

Synergistic effect of trace elements and flavonoids from Epimedium koreanum Nakai on primary osteoblasts

Several trace elements, particularly, manganese （Mn） and zinc （Zn）, are essential in bone metabolism as cofactors for specific enzymes. It has been reported that there exists the relationship between osteoporosis and trace element-deficiency and the efficacy of Ca, Mn and Zn supplementation on spinal bone mineral density in postmenopausal women. Traditional Chinese medicines （TCM）, such as Herba epimedii, were proved to be effective for prevention of osteoprosis in vivo; however, the efficacy of the main constituents and/or crude extract was not ideal in vitro, which suggested that they may work in another way. The purpose of the present study was to examine whether the combination of icariin and total flavonoids （TF） from Herba epimedii with mineral elements, which were abundant in Herba epimedii, would have a more beneficial effect on the viability and differentiation of primary osteoblasts than either agent alone, and to analyze the dada for a possible synergistic, additive or antagonistic effect. The combinations of 10 μmol/L Zn, Ca and Mn with icariin and total flavonoids greatly improved the cell viability and meanwhile dramatically enhanced the alkaline phosphatase activity as compared to each agent alone. On the other hand, an increased cell growth inhibition was also observed by combining 0.1 μmol/L, 1 pmol/L Zn with 10μmol/L icariin, and 10 μmol/L Mn with 0.06 μg/mL total flavonoids. Meanwhile a decreased alkaline phosphatase activity was also found in several icariin-Zn/Mn and total flavonoids-Zn/Ca/Mn combinations. These results suggested that mineral elements （Zn, Ca, Mn） greatly enhanced the efficacy of icariin and total flavonoids from Herba epimedii on the viability and differentiation of primary osteoblasts by certain combinations.