电感耦合等离子体原子发射光谱法测定当归补血汤中多种微量元素

采用电感耦合等离子体原子发射光谱法测定当归补血汤中多种微量元素,考查当归、黄芪以不同的配比进行煎煮时微量元素的溶出情况。实验证明、当归、黄芪生药材及水煎液经硝酸-高氯酸体系消化,样品消解完全,可以满足ICP-AES检测的要求。相对标准偏差为0.82%～5.56%,加标回收率为97.2%～115.4%,完全能满足中草药中微量元素的测试要求。而各种微量元素的溶出率均以当归、黄芪为1∶5的配比的共煎液中各种微量元素溶出率最高, 证实了该配伍的合理性。文章为药剂学研究提出了一个简便、准确和可行的研究方法的同时,也对当归补血汤配伍合理性进行了考察,为其临床疗效提供了有效依据。     

中药四物汤提取物调控鼠骨髓间充质干细胞增殖活性的化学成分分析

用石油醚、乙酸乙酯、氯仿和二次蒸馏水分别提取四物汤药剂,得到不同极性部位的溶剂提取物。促进骨髓间充质干细胞(rMSCs)增殖活性用四甲基偶氮唑盐(MTT)法,结果表明,四物汤乙酸乙酯提取部位(A-2)具有促进MSCs增殖的活性。用硅胶柱层析的方式对A-2作梯度洗脱得到20个组分,记为F-1~F-20。经MTT法和流式细胞技术评价,选择具有促进MSCs增殖的活性的F-4、F-7、F-10和F-11组分。采用HPLC、红外光谱和质谱检测发现,组分F-4为藁本内酯;用HPLC-MSn发现,F-11中含量达84.47%的成分为6,7-二羟基-烯丙基苯酞。HPLC结果显示,F-7和F-10有较大含量的脂肪酸酯类化合物。选用4个酯类标准品,先用MTT法和流式细胞技术对其评价;结果显示浓度为90mg/L时,十六酸甲酯(S-1)和十八酸乙酯(S-4)的增殖指数(PI)均高于对照组,具有促进MSCs体外增殖作用;而十六酸乙酯(S-2)和十八酸甲酯(S-3)增殖指数(PI)均低于对照组,具有抑制MSCs体外增殖作用。对F-7鉴定中检出含有S-1(3.04%),S-2(3.92%),S-4(9.61%),在F-10中检出S-1(14.46%),S-2(17.47%),S-3(3.19%),S-4(1.03%)。生物活性显示F-7活性强于F-10。初步推测在酯类混合物中,对MSCs起促进作用主要为S-1和S-4。结果表明,四物汤乙酸乙酯提取部位具有促进MSCs增殖作用的成分是藁本内酯、十六酸甲酯和十八酸乙酯。     

电感耦合等离子体原子发射光谱测定当归补血汤中铅、铬、镉、砷

采用电感耦合等离子体原子发射光谱测定了当归、黄芪及两种药材不同配伍形式的水煎液中铅、铬、镉、砷等金属元素含量。比较了不同提取方法及磷脂类化合物对当归补血汤中这些金属元素溶出的影响。实验表明,当归、黄芪生药材及水煎液经硝酸消化,样品消解完全,能满足电感耦合等离子体-原子发射光谱(ICP-AES)检测的要求。方法加标回收率为83.0%~96.0%,相对标准偏差为0.36%~4.67%,且当归∶黄芪配比为1∶5时水煎液中重金属元素溶出率低于1∶1配比,证实了当归补血汤经典配方的合理性,为其临床疗效提供了有效依据。     

经典名方当归四逆汤物质基准的关键质量属性研究

该文建立了当归四逆汤物质基准的高效液相色谱(HPLC)特征图谱及多指标含量测定方法,阐明了当归四逆汤物质基准的关键质量属性,完善了其质量控制体系.使用的色谱柱为PomenexLuna?C18(250 mm×4.6 mm,5 μm),流动相为乙腈-0.05％磷酸水溶液,体积流量为1.0 mL·min-1,梯度洗脱,进样量...     

高效液相色谱-蒸发光散射检测法同时测定四君子丸中的5种有效成分

建立了同时测定四君子丸中党参炔苷、茯苓酸、甘草酸、苍术内酯III和白术内酯I含量的高效液相色谱法。色谱条件为: HIQ SIL C18 V色谱柱(250 mm×4.6 mm, 5 μm),以0.5%冰乙酸-甲醇体系为流动相进行梯度洗脱,流速为1.0 mL/min,采用蒸发光散射检测器检测,进样量为10 μL,柱温为25 ℃,漂移管温度为55 ℃,喷雾器加热级别为60%,载气为氮气,压力0.2 MPa。在上述条件下,党参炔苷、茯苓酸、甘草酸、苍术内酯III和白术内酯I的质量浓度分别在0.076～1.21, 0.048～0.76, 0.153～2.45, 0.045～0.72和0.098～1.56 g/L时,质量浓度的对数值与色谱峰面积的对数值之间的线性关系良好;平均回收率在97.13%～100.25%之间,相对标准偏差在1.23%～2.44%之间。该方法简便、快速、准确,可用于四君子丸的质量控制。     

Comparative metabolism of the eight main bioactive ingredients of gegen qinlian decoction by the intestinal flora of diarrhoeal and healthy piglets

Diarrhoeal diseases alter the composition of intestinal flora, thereby affecting the efficacy of herbal medicinal formulations. Gegen Qinlian decoction (GQD), a Chinese traditional herbal formulation, is widely used to treat infectious diarrhoea. However, little is known about the microbial disposition of GQD in the diarrhoeal state. In this study, the comparative metabolism of components of GQD by diarrhoeal and normal intestinal flora was investigated in vitro. UPLC–MS/MS was performed for simultaneous analysis of eight ingredients of GQD in bacterial solution. The type, activities, and sources of microbial enzymes were also investigated. Microbial metabolism of daidzin, genistin and liquiritin (metabolized by β‐glucosidase); baicalin, wogonoside and glycyrrhizin (metabolized by β‐glucuronidase); and berberine and coptisine (metabolized via nitroreductase) was faster in the diarrhoeal group than in the normal group. Moreover, the activities of these enzymes in the diarrhoeal group were higher than those in the normal group. This difference might be associated with the increase in Escherichia spp. Thus, a change in the metabolism of components by diarrhoeal intestinal flora is associated with a preponderance of Escherichia spp., which might improve the efficacy of GQD. These findings have implications for understanding the action mechanism of GQD for diarrhoea treatment in terms of the microbial milieu.     

Simultaneous quantification of multiple components in rat plasma by UPLC‐MS/MS and pharmacokinetic study after oral administration of Huangqi decoction

A rapid, sensitive and accurate UPLC‐MS/MS method was developed for the simultaneous quantification of components of Huangqi decoction (HQD), such as calycosin‐7‐O‐β‐d ‐glucoside, calycosin‐glucuronide, liquiritin, formononetin‐glucuronide, isoliquiritin, liquiritigenin, ononin, calycosin, isoliquiritigenin, formononetin, glycyrrhizic acid, astragaloside IV, cycloastragenol, and glycyrrhetinic acid, in rat plasma. After plasma samples were extracted by protein precipitation, chromatographic separation was performed with a C₁₈ column, using a gradient of methanol and 0.05% acetic acid containing 4mm ammonium acetate as the mobile phase. Multiple reaction monitoring scanning was performed to quantify the analytes, and the electrospray ion source polarity was switched between positive and negative modes in a single run of 10 min. Method validation showed that specificity, linearity, accuracy, precision, extraction recovery, matrix effect and stability for 14 components met the requirements for their quantitation in biological samples. The established method was successfully applied to the pharmacokinetic study of multiple components in rats after intragastric administration of HQD. The results clarified the pharmacokinetic characteristics of multiple components found in HQD. This research provides useful information for understanding the relation between the chemical components of HQD and their therapeutic effects.     

延胡索及水煎液中14种无机元素的测定

为了探索延胡索中无机元素与其活血，理气，止痛的药效关系，用等离子体发射光谱法测定了延胡索及水煎液中１４种元素的含量，其含量较高的有Ｆｅ，Ｍｇ，Ｚｎ，Ｃａ，Ｍｎ。     

中药方剂血府逐瘀汤中分子在靶标-配体空间的分布

研究了中药方剂血府逐瘀汤(XFZYD)中501个分子在心血管疾病重要的靶酶肾素(renin), 血管紧张素转化酶I(angiotensin-converting enzyme I, ACE I), 3-羟基-3-甲基戊二酰辅酶A还原酶(HMG-CoAR)和P糖蛋白的靶标-配体空间分布.