Assessment of systemic interaction between Swertia chirata extract and its Bioactive constituents in rabbits

The plant Swertia chirata (Gentianaceae) is known for its multifarious medicinal value in the Indian system of medicine (Ayurveda). Its methanol extracts having antidiabetic activity contains mangiferin, amarogentin, amaroswerin, sweroside and swertiamarin as active constituents. The pharmacokinetics of mangiferin and amarogentin have been carried out after intravenous administration of pure standards and extract from S. chirata (CT) in rabbits to assess systemic interaction. The remaining three components were also monitored in plasma for pharmacokinetic estimation based on the ratio analysis method. Mangiferin was characterized by a relative low clearance (～0.14 L/h/kg) and a lesser volume of distribution (～0.15 L/kg), while amarogentin exhibited a rapid clearance (～2.62 L/h/kg) and wide distribution (～1.08 L/kg) from the systemic circulation. No significant difference was observed in pharmacokinetic parameters of mangiferin and amarogentin either administered alone or as CT formulation in rabbits. Copyright © 2009 John Wiley & Sons, Ltd.     

反相高效液相色谱法测定滋肾丸中芒果苷、盐酸小檗碱含量

目的采用反相高效液相色谱法测定滋肾丸中芒果苷、盐酸小檗碱的含量。方法色谱柱 :Hy persilC18柱 ;芒果苷流动相为甲醇 水 醋酸 (2 2∶78∶0 6,V∶V) ,检测波长 :3 2 0nm ;盐酸小檗碱流动相为甲醇 乙腈 水 三乙胺 (1 0∶2 3∶70∶0 2 ,V∶V) ,用磷酸调pH =4,检测波长 :3 40nm。结果芒果苷平均回收率为 97 3 % ,RSD =1 9% (n =5 ) ;盐酸小檗碱平均回收率为 1 0 0 8% ,RSD =2 8% (n =5 )。结论本法简便 ,准确 ,为滋肾丸的质量控制提供一定依据。     

HPLC法测定乾坤丹（Ⅰ）中毛蕊异黄酮葡萄糖苷和芒果苷

目的建立乾坤丹(Ⅰ)中毛蕊异黄酮葡萄糖苷和芒果苷的HPLC测定方法。方法采用HPLC法,Phenomenex C18色谱柱(250 mm×4.6 mm,5μm);流动相为乙腈–0.5%甲酸,梯度洗脱;检测波长260 nm;体积流量1.0 mL/min;柱温30℃。结果毛蕊异黄酮葡萄糖苷、芒果苷线性范围分别为0.374~5.984μg、0.526~8.402μg。毛蕊异黄酮葡萄糖苷、芒果苷的平均加样回收率分别为99.72%、100.15%,RSD值分别为1.37%、1.08%。结论建立的方法简便、准确、灵敏度高、重复性好,为建立可靠的乾坤丹(Ⅰ)质量标准、更好地控制制剂质量提供有效借鉴。     

整合指纹图谱与多成分含量测定的酸枣仁汤质量评价研究

目的 利用HPLC-DAD-ELSD分析技术，建立酸枣仁汤指纹图谱结合多成分含量测定方法，为其质量控制提供参考。方法 采用Phenomenex C₁₈色谱柱(250 mm×4.6 mm,5.0μm)，以0.1%甲酸水溶液-乙腈为流动相进行梯度洗脱，体积流量为1.0 mL/min，柱温30℃，在282 nm和335 nm检测波长下，分别以芒果苷和斯皮诺素为参照峰；ELSD漂移管温度105℃，载气体积流量2.5 L/min条件下，以酸枣仁皂苷A为参照峰，采用中药色谱指纹图谱相似度评价系统对10批自制酸枣仁汤进行相似度评价；同时建立13个指标成分含量测定方法，应用于市售产品及自制样品的质量评价。结果 10批自制酸枣仁汤的平均出膏率为21.57%，在282 nm和335 nm分别标定了5个和4个共有峰，相似度分别为0.907～0.999、0.926～0.999;HPLC-ELSD指纹图谱中标定了4个共有峰，相似度为0.946～0.999。13种指标成分在各自的线性范围内线性关系良好(r>0.995 9)，平均加样回收率为93.69%,RSD值平均为2.04%。10批...     

HPLC法测定盐炙前后知母中新芒果苷、芒果苷和异芒果苷

目的建立HPLC法同时测定盐炙前后知母中新芒果苷、芒果苷、异芒果苷,并比较盐炙前后3种成分的差异。方法采用HPLC法,Ecosil色谱柱(150 mm×4.6 mm,5μm),流动相乙腈–0.2%冰醋酸,梯度洗脱,体积流量1.0 m L/min,检测波长258 nm,柱温室温,进样量10μL。结果新芒果苷、芒果苷、异芒果苷分别在0.860 0~17.200 0μg、0.806 5~16.130 0μg、0.039 0~0.780 0μg与峰面积的线性关系良好;平均回收率分别为98.32%、98.30%、97.27%,RSD值分别为0.87%、0.74%、0.71%(n=6)。知母盐炙后新芒果苷、异芒果苷的量减少,而芒果苷的量增加。结论该方法准确、专属性强、灵敏度高,可用于知母中新芒果苷、芒果苷、异芒果苷的质量控制方法。新芒果苷、芒果苷之间可能在炮制过程中发生了转化,可为进一步研究盐知母炮制机制提供参考。     

HPLC测定银花芒果片中绿原酸、芒果苷和橙皮苷的含量

目的 建立HPLC同时测定银花芒果片中绿原酸、芒果苷和橙皮苷的含量。方法 采用Waters SunFire^TM C₁₈ (4.6 mm×150 mm,5 μm)色谱柱;流动相为甲醇(A)-0.2%磷酸水溶液(B),梯度洗脱,流速为1.0 mL·min^-1,检测波长为327 nm(0~10 min,绿原酸),258 nm(10~20 min,芒果苷),283 nm(20~40 min,橙皮苷)。结果 绿原酸进样量在0.140~2.516 μg内线性关系良好(r=0.999 9,n=6),平均回收率为99.4%,RSD为1.2%(n=9);芒果苷进样量在0.042~0.761 μg内线性关系良好(r=0.999 9,n=6),平均回收率为99.9%,RSD为1.4%(n=9)。橙皮苷进样量在0.076~1.361 μg内线性关系良好(r=0.999?8,n=6),平均回收率为99.9%,RSD为0.7%(n=9)。结论 该方法简便、快捷、准确,可用于该制剂的质量控制。     

近红外光谱法快速测定知母中芒果苷的含量

目的:应用近红外光谱技术建立快速测定知母中芒果苷含量的方法。方法:以HPLC所测样品中芒果苷的含量为参考值,将近红外光谱与知母中芒果苷的含量进行关联,对光谱预处理方法和建模区间进行了考察,采用偏最小二乘法(PLS)建立定量分析模型。结果:通过比较最终确定以SNV+SG+Second Derivative对光谱进行预处理,结合软件的波长区间优化功能,确定4 139.58~5 068.56 cm-1为最佳波段。结果 100份知母样品所建立的芒果苷的定量分析模型内部交叉验证决定系数(R2)校正均方根偏差(RMSEC)、预测均方根偏差(RMSEP)分别为0.963 61,0.061 6,0.088 1。结论:该方法准确、快速、简便,建立的定量分析模型,能够对知母中芒果苷的含量进行快速测定。     

A review of the bioactivity of South African herbal teas: rooibos (Aspalathus linearis) and honeybush (Cyclopia intermedia)

Rooibos (Aspalathus linearis) and honeybush (Cyclopia intermedia) are popular tisanes in their native South Africa and have a growing worldwide market. Both herbal teas are used traditionally for medicinal purposes and are rich in polyphenols with rooibos a rare source of the dietary dihydrochalcones, aspalathin and nothofagin. The principal polyphenols in honeybush include the xanthone mangiferin and the flavonones hesperitin and isokuranetin. Despite their divergent phytochemical and nutrient compositions, rooibos and honeybush share potent antioxidant and antimutagenic activities in vitro. Animal model studies indicate both herbal teas possess potent antioxidant, immune-modulating and chemopreventive actions. However, human studies of rooibos are limited and of honeybush are absent. No adverse effects of rooibos or honeybush consumption as tisanes have been reported.     

超高效液相色谱法同时测定知母中芒果苷等6种成分的含量

 目的 建立同时测定知母中新芒果苷,芒果苷,知母皂苷BⅡ,2,6,4′-三羟基-4-甲氧基苯甲酮,构树宁B,顺-扁柏树脂酚的UPLC方法。方法 采用ACQUITY UPLC, HSS T3色谱柱(2.1 mm×100 mm, 1.8 μm),流动相为乙腈-0.03%的磷酸水溶液梯度洗脱,流速为0.5 mL·min^-1,检测波长采用210和192 nm。结果 新芒果苷,芒果苷,知母皂苷BⅡ,2,6,4′-三羟基-4-甲氧基苯甲酮,构树宁B,顺-扁柏树脂酚的质量浓度与峰面积分别在15.00～299.6 μg·mL^-1, 8.80～175.6 μg·mL^-1, 40.00～800.0 μg·mL^-1,2.300～45.60 μg·mL^-1, 0.420～8.50 μg·mL^-1, 0.400～9.00 μg·mL^-1内呈良好的线性关系。平均加样回收率（n=9）均在97.7%~100.6%之间,RSD均小于1.2%。结论 该方法快速、准确、简便,可作为同时测定知母中新芒果苷,芒果苷,知母皂苷BⅡ,2,6,4′-三羟基-4-甲氧基苯甲酮,构树宁B,顺-扁柏树脂酚的方法。     

Anthelminthic and antiallergic activities of Mangifera indica L. stem bark components Vimang and mangiferin

This study investigated the antiallergic and anthelmintic properties of Vimang (an aqueous extract of Mangifera indica family stem bark) and mangiferin (the major polyphenol present in Vimang) administered orally to mice experimentally infected with the nematode, Trichinella spiralis. Treatment with Vimang or mangiferin (500 or 50 mg per kg body weight per day, respectively) throughout the parasite life cycle led to a significant decline in the number of parasite larvae encysted in the musculature; however, neither treatment was effective against adults in the gut. Treatment with Vimang or mangiferin likewise led to a significant decline in serum levels of specific anti-Trichinella IgE, throughout the parasite life cycle. Finally, oral treatment of rats with Vimang or mangiferin, daily for 50 days, inhibited mast cell degranulation as evaluated by the passive cutaneous anaphylaxis test (sensitization with infected mouse serum with a high IgE titre, then stimulation with the cytosolic fraction of T. spiralis muscle larvae). Since IgE plays a key role in the pathogenesis of allergic diseases, these results suggest that Vimang and mangiferin may be useful in the treatment of diseases of this type.