紫雪花水提液抗肿瘤的初步研究

目的观察紫雪花水提液对小鼠移殖性肿瘤S180的抑瘤作用,及其对免疫器官的影响。方法采用昆明种小鼠,随机分组进行实验,观察不同剂量紫雪花水提液(6.8,13.5,27 g/kg)3种剂量、紫雪花水提液与氟脲嘧啶(5-FU)合用以及单用氟脲嘧啶对小鼠移殖性肿瘤S180的抑瘤率的差别以及对胸腺、脾脏、肝脏的影响。结果紫雪花水提液3种剂量和紫雪花水提液与氟脲嘧啶合用及氟脲嘧啶单用对小鼠S180均有不同程度的抑制肿瘤生长的作用,抑瘤率分别为22.35%(P>0.05),40.01%(P<0.05),26.45%(P>0.05),50.5%(P<0.01),56%(P<0.01)。紫雪花水提液在发挥抑瘤作用的同时,可降低肝脏和脾脏的重量,但对胸腺有明显的保护作用。与5-Fu(0.025 g/kg)合用有抑瘤作用,并可明显的对抗5-Fu抑制胸腺的作用。结论3种剂量紫雪花水提液均有抑制小鼠移殖性肿瘤S180的生长作用。紫雪花水提液与5-Fu合用对小鼠移殖性肿瘤S180有抑瘤作用,同时,具有明显的对抗5-Fu抑制胸腺的作用。     

HPLC法测定云南不同产地白花丹的不同部位中白花丹醌的含量

目的:建立白花丹药材中白花丹醌的反相高效液相色谱测定方法,以分别考察云南不同产地白花丹药材的不同部位中白花丹醌的含量。方法:色谱柱为 Kromasil C_(18)柱(250 mm×4.6 mm,5μm),流动相为甲醇-水(70:30),流速为1.0mL·min~(-1),检测波长为254 nm,柱温为25℃。结果:白花丹醌在25.3～253μg·mL~(-1)范围内,具有良好的线性关系,r=0.9998;平均回收率为99.0%,RSD=1.4%(n=6)。不同产地白花丹药材地上部分的白花丹醌含量分别为0.046%(嘎洒),0.079%(勐养),0.134%(嘎东),0.032%(曼东),0.047%(曼阁),0.057%(曼老);根部的白花丹醌含量分别为0.842%(嘎洒),1.04%(勐养),1.44%(嘎东),0.763%(曼东),0.639%(曼阁),1.97%(曼老)。结论:本法简便、准确,灵敏度高,重复性好,可用于控制白花丹药材质量。     

白花丹醌的提取分离鉴定

目的对多民族药材白花丹(Phum bago zeylanicaL.)中的白花丹醌进行提取分离和鉴定。方法用硅胶柱层析分离;用TLC,IR,MS,NMR等技术鉴定结构。结果从白花丹中分离得到桔黄色针状结晶,根据理化性质、薄层色谱及光谱数据分析,鉴定为白花丹醌(P lumbagin)。结论为建立白花丹药材的质量控制方法打下了物质基础,对白花丹临床用药安全及进一步开发具有极其重要的意义。     

白花丹的研究进展

通过查阅参考大量的文献资料，对多民族药材白花丹的原植物、药材、化学成分、药理作用、临床应用等作一介绍。     

Quality Control Standards for the Roots of Three Plumbago Species

Physicochemical parameters of roots of three Plumbago species, Plumbago capensis, P. rosea and P. zeylanica belonging to Plumbaginaceae were analyzed. Microbial contamination, aflatoxins, pesticide residue and heavy metal content were also determined. Attempt has also been made to estimate the biologically active chemical plumbagin present in them and the data compared. The study ensures that the quality control parameters do help in the proper standardization of the crude drugs in drug development process for global acceptance.     

HPLC-ELSD测定白花丹药材中的β-谷甾醇

目的 建立测定白花丹药材中β-谷甾醇含量的方法,并比较白花丹药材不同药用部位、不同产地和不同采收期中β-谷甾醇的含量.方法 采用高效液相色谱-蒸发光散射检测法,色谱柱为Kromasil C_(18)柱(250 mm ×4.6 mm,5μm),流动相为甲醇,流速为1.0 mL·min~(-1),柱温为30℃,漂移管温度为40℃,载气(N2)压力3.5 bar.结果 β-谷甾醇1.080～4.860 μg与峰面积的自然对数呈良好的线性关系(r=0.9995),平均回收率为99.80%.白花丹根、茎中β-谷甾醇的含量分别为0.2074、0.4064 mg·g~(-1),叶中未测到;测得广西产白花丹中的含呈量普遍低于云南所产,西双版纳南药园的白花丹中β-谷甾醇含量最高;不同采收期白花丹茎中β-谷甾醇的含量较高.结论 所建方法简便、准确、重复性好,可以作为控制白花丹药材质量的方法之一.     

Protective Effect of Plumbago zeylanica Against Cyclophosphamide-Induced Genotoxicity and Oxidative Stress in Swiss Albino Mice

Plumbago zeylanica, commonly known as white leadwort, found abundantly in the plains of Bengal and southern India, was tested for its possible in vivo protective effect against cyclophosphamide-induced genotoxicity and oxidative stress in Swiss albino mice. Pretreatment with the alcoholic root extract of Plumbago zeylanica (250 and 500 mg/kg body weight orally for 5 days) significantly reduced the frequency of micronucleated polychromatic erythrocytes (MnPCEs), increased the PCE/NCE (normochromatic erythrocyte) ratio in the bone marrow, and decreased the levels of lipid peroxidation products with concomitant changes in the status of antioxidants. Both doses of Plumbago zeylanica were effective in exerting a protective effect against cyclophosphamide-induced genotoxicity and oxidative stress.     

白花丹炮制工艺考察

目的:优化白花丹炮制工艺,为该药材的临床安全应用提供参考。方法:以白花丹醌、香草酸含量的综合评分为指标,通过正交试验考察炮制时间、白酒用量、乙醇体积分数对白花丹炮制工艺的影响。采用HPLC测定白花丹醌及香草酸含量,流动相甲醇-0.15%磷酸梯度洗脱,检测波长260 nm。结果:最佳酒炙炮制工艺为白酒用量0.2 m L·g-1,炮制时间45 min,乙醇体积分数12%。白花丹醌、香草酸质量分数分别为0.013 0%,0.019 3%。结论:优选的工艺条件稳定可行、方法简便,可用于白花丹的质量控制与酒炙品制备。     

Antihyperlipidemic effect of aqueous extract of Plumbago zeylanica roots in diet-induced hyperlipidemic rat

This study examined the antihyperlipidemic effect of the aqueous extract of Plumbago zeylanica Linn. (Plumbaginaceae) roots in diet-induced hyperlipidemic rats. The oral administration of the aqueous extract at the dose of 20, 40, and 80?mg kg^?1 were found to ameliorate the hyperlipidemic condition as evidenced by a reduction of cholesterol and triglyceride levels. The standards fenofibrate (20?mg kg^?1) and atorvastatin (8?mg kg^?1) were also found to exhibit significant (p?<?0.05) cholesterol and triglyceride lowering effect. Further, the aqueous extract at all doses demonstrated a significant (p?<?0.05) increase in fecal cholesterol excretion indicating a reduction in intestinal cholesterol absorption. Additionally, the activity of lipogenic enzymes like HMGCoA reductase in the liver remained significantly (p?<?0.05) low on treatment of aqueous extract (80?mg kg^?1), thus decreasing the cholesterogenesis. The aqueous extract (20, 40 and 80?mg kg^?1) also significantly (p?<?0.05) reduced the total lipid content in the liver. Moreover, the aqueous extract demonstrated a potential antioxidant capacity in DPPH and TBARS in vitro antioxidant assay. Thus the results suggest a beneficial role of aqueous extract of Plumbago zeylanica roots in ameliorating the hyperlipidemic condition leading to atherosclerosis.     

Antifertility Activity of Stems of Plumbago rosea in Female Albino Rats

In the present study, Plumbago rosea Linn. (Plumbaginaceae), one of the folk medicinal plants commonly used as an antifertility agent, was evaluated for its antifertility effect. Five successive solvent extracts, petroleum ether, chloroform, acetone, ethanol, and water extracts, of the stems of P. rosea were studied on estrous cycle at two dose levels, 200 and 400 mg/kg respectively. Of these, the acetone extract was found to be most effective in interrupting the normal estrous cycle of rats (p < 0.05) (p < 0.01). The rats exhibited prolonged diestrous stage of the estrous cycle with consequent temporary inhibition of ovulation. The antiovulatory activity was reversible on withdrawal of the extract. The effective acetone extract was further studied on estrogenic functionality in rats. The acetone extract showed significant estrogenic and antiestrogenic activity (p < 0.05) (p < 0.001). Histological studies of the uteri further confirmed the estrogenic activity of acetone extract. The results indicated the antifertility activity of stems of Plumbago rosea in female Wistar rats.