穿心莲成分API_(0134)防治家兔系膜增殖性肾炎的实验研究

建立家兔系膜增殖性肾炎模型，研究API0134对家兔血脂、超氧歧化酶（SOD）及丙二醛（MDA）作用以及对肾脏组织的影响，并探讨了可能的机制。结果表明，API0134用药组血清总胆固醇（TC）、甘油三酯（TG）、低密度脂蛋白胆固醇（LDL－C）低于模型组，高密度脂蛋白胆固醇（HDL－C）及HDL－C／LDL－C高于模型组（P＜0．05），SOD活性明显高于模型组（P＜0．01），而MDA正常。用药组肾组织损害较轻。研究证实，API0134能够预防兔的高脂血症，具有抗氧化作用，能够抑制系膜细胞及基质的增殖，保护肾组织。     

穿心莲成分对血栓模型家兔血小板三磷酸肌醇及其受体表达的影响

目的　观察穿心莲成分 API0 1 34 (API)抗血小板活化和聚集的机制。方法　建立高脂血症家兔动脉血栓形成模型。观察穿心莲成分 API0 1 34 (API)对闭塞性血栓形成时间 (OT)、血小板聚集、血液血小板活化因子 (PAF)含量、血小板内三磷酸肌醇 (IP3)含量和 IP3受体 (IP3R)表达的影响。结果　 API能够显著延长 OT和抑制血小板聚集 ,降低血液 PAF和血小板内 IP3含量 ,抑制血小板内 IP3R蛋白的表达。API 5 0 mg/ kg的抑制作用明显强于 API 5 m g/ kg。结论　 API具有较强的抗血小板聚集和抗血栓形成作用 ,API对血小板 PAF- IP3/ IP3R信号途径的抑制作用 ,是 API抗血小板活化和聚集的机制之一     

Amelioratory effect of Andrographis paniculata Nees on liver, kidney, heart, lung and spleen during nicotine induced oxidative stress

The ameliorative properties of bioactive compound andrographolide (ANDRO), aqueous extract of Andrographis paniculata (AE-AP) and vitamin E (vit.E) were tested against nicotine induced liver, kidney, heart, lung and spleen toxicity. A group of male Wistar rats were intraperitoneally administered vehicle, nicotine (1 mg/kg body weight/day), nicotine + ANDRO (250 mg/kg body weight/day), nicotine + AE-AP (250 mg/kg body weight/day) and nicotine + vit.E (50 mg/kg body weight/day) for the period of 7 days. The significantly increased levels of lipid peroxidation, protein oxidation and the decreased antioxidant enzyme status were noted in nicotine treated group as compared to vehicle treated group. ANDRO, AE-AP and vit.E significantly reduced the lipid peroxidation, protein oxidation and increased the antioxidant enzyme status. This indicates A. paniculata and vit.E may act as putative protective agent against nicotine induced tissue injury and may pave a new path to develop suitable drug therapy.     

Three new indole alkaloid derivatives from the roots of Murraya paniculata

Three new indole alkaloid derivatives, named paniculidines D?F (1?3), and six known analogs (4?9) were isolated from the roots of Murraya paniculata. The structures were elucidated on the basis of comprehensive HRESIMS, UV, IR, and NMR spectroscopic data analysis and comparison with the data reported in literature. The absolute configurations of new compounds were assigned via the determination of specific optical rotation, Mosher′s method, and ECD spectra. Compound 3 is the first heterodimer of C-N linked indole and coumarin derivatives.     

Pharmacokinetic analysis and tissue distribution of andrographolide in rat by a validated LC-MS/MS method

Context: Andrographis paniculata (Burm.f.) Nees (Acanthaceae) is widely used in tribal medicine in India and some other countries for multiple clinical applications. It contains andrographolide (AG) (diterpenoid lactone), a major phytomarker which probably accounts for its medicinal properties.

Objective: This study investigates the site-specific distribution of AG in different tissues of rats and its pharmacokinetic parameter evaluation by using a validated liquid chromatography tandem mass spectrometry (LC-MS/MS) method.

Materials and methods: A simple and sensitive LC-MS/MS method has been developed and validated to quantify the presence of AG in plasma and various tissues of rat following oral administration of A. paniculata extract and AG in a dose of 133.33 and 100?mg/kg/day, respectively, for four weeks.

Results: The present study showed that the highest concentration of AG was in kidney (156.12?ng/g) followed by liver, spleen and brain while almost same concentration was found in heart and lung. The apparent C_max, T_max, elimination half-life and total exposure (AUC_0–α) were 115.81?ng/ml, 0.75, 2.45 and 278.44?ngh/ml, respectively.

Conclusion: This was an attempt to determine the presence of AG (a known biomarker) in tissues such as kidney, heart, lungs, brain and plasma of rats using a validated LC-MS/MS method. Furthermore, the observed reduced concentration in plasma and various tissues from 1 to 8?h might be attributed to relatively rapid elimination or distribution of AG from the central compartment.     

穿心莲UPLC-PDA指纹图谱研究及4种内酯类成分含量测定

分析研究不同部位及产地穿心莲药材,为穿心莲相关制剂工艺提供依据。以穿心莲内酯峰为参照,确定了27个共有指纹峰,建立了23批穿心莲药材的UPLC-PDA数字化定量指纹图谱,特征提取后对其进行主成分分析(PCA);采用外标法测定23批穿心莲药材中穿心莲内酯、新穿心莲内酯、去氧穿心莲内酯、脱水穿心莲内酯成分含量,并采用Plackett-Burman试验设计结合pareto图研究耐用性因素对方法的影响。结果发现,穿心莲药材部位比产地对药材质量的影响更显著;药材不同部位4种内酯含量差异大;流动相p H是影响方法耐用性较大的因素。     

中药穿心莲和当归对小鼠红细胞血红蛋白再释放的影响

目的：探讨穿心莲和当归对小鼠红细胞血红蛋白再释放的影响。方法：将实验用小鼠雌雄各半按体重均匀分为7组（6个用药组和1个对照组）,按实验设计分别对穿心莲和当归高、中、低浓度用药组小鼠用穿心莲和当归水煎液进行灌胃,对照组用生理盐水灌胃,每天1次,连续灌胃15 d,然后分别采血分离红细胞观察其血红蛋白再释放的情况,并用BandScan扫描定量,进行统计分析。结果：中、高浓度的穿心莲和高浓度的当归都能使小鼠红细胞血红蛋白的再释放增强。结论：穿心莲和当归水煎液均能影响实验小鼠的血红蛋白再释放,但影响程度随浓度不同而有差异。     

布渣叶的薄层色谱鉴别及红外光谱分析

目的 建立布渣叶黄酮类成分的薄层色谱鉴别方法,并对药材进行红外光谱分析,以更好地控制布渣叶质量.方法 采用薄层色谱法和红外光谱法对15个不同产地的布渣叶进行质量分析.结果 不同产地布渣叶中均可检出山柰素、牡荆苷和异牡荆苷,薄层色谱斑点清晰,分离度好;红外光谱中可见16个特征吸收峰.结论 该法简便、灵敏、准确、重现性好,可作为布渣叶的质量控制方法.     

不同来源的穿心莲药材HPLC指纹图谱研究

目的 建立穿心莲药材的指纹图谱并进行聚类分析,为其科学评价及质量控制提供可靠的方法.方法 采用Welch Ultimate XB-C18柱(250mm ×4.6 mm,5μm)色谱柱,以乙腈-水为流动相梯度洗脱,检测波长226 nm,流速1.0mL· min-1,柱温25℃.采用中药色谱指纹图谱相似度评价系统(2004...     

Paniculacin,a new coumarin derivative from Murraya paniculata

Paniculacin (1), a new coumarin derivative, has been isolated from the ethyl acetate soluble fraction of the ethanolic extract of Murraya paniculata along with umbelliferone, scopoletin, 4-hydroxybenzoic acid, trans-cinnamic acid, and β-sitosterol. Their structures were elucidated on the basis of spectral data.