番泻叶浸剂灌肠在腹部手术后应用的临床与实验研究

目的：探讨番泻叶侵剂治疗腹部手术后胃肠道功能紊乱的疗效及其机理。方法：患者腹部手术后灌肠给番泻叶侵剂，观察术后腹部功能恢复情况，并进行了动物实验。结果：经治疗１３０例患者腹部手术后在加快肠鸣音出现和恢复，缩短排气、排便时间，减少切口感染等方面疗效显著。动物实验结果表明：该药对大鼠在体肠管运动有明显的增强作用（Ｐ〈０．０１）；有显著的增强离体大鼠回肠蠕动和增大收缩振幅的作用（Ｐ〈０．０５）；对在体小     

沙枣枝中总黄酮提取条件的研究

目的以青海当地沙枣枝为原料,对其中黄酮类化合物进行了提取研究。方法用索氏提取器分别以水、乙醇为浸提介质。结果在水提取法中,时间和固液比两因素对提取率没有显著影响(P>0.05),而温度对于水提取率有极显著的影响(P<0.01);在乙醇提取法中,以95%的浓度最好。结论乙醇提取法与水提取法的提取率不存在显著性差异(P>0.05),所以推荐采用水提取法。     

新疆沙枣提取物抗腹泻的初步药效学研究

目的:评价新疆沙枣提取物抗腹泻作用.方法:采用小鼠番泻叶致泻和毛果芸香碱致小鼠小肠运动亢进2种模型,观察沙枣的抗腹泻作用.小鼠随机分为4组:沙枣水提取物组、沙枣醇提取物组、阳性药思密达组、模型组.各组预防性给药,连续灌胃给予番泻叶或毛果芸香碱,观察各组小鼠的排便和炭粒推进情况.在离体豚鼠回肠上研究沙枣2种提取物对抗毛果芸香碱和磷酸组胺引起的收缩作用.结果:在番泻叶致泻中,沙枣提取物可使小鼠湿粪数明显减少,尤以醇提物明显;对毛果芸香碱致小鼠肠管炭粒推进有抑制作用.体外试验沙枣提取物对毛果芸香碱致肠管收缩有明显抑制作用,对磷酸组胺无抑制作用.结论:沙枣提取物有一定的止泻作用.     

Suchilactone inhibits the growth of acute myeloid leukaemia by inactivating SHP2

ContextSuchilactone, a lignan compound extracted from Monsonia angustifolia E.Mey. ex A.Rich. (Geraniaceae), has little research on pharmacological activity; whether suchilactone has inhibitory effect on acute myeloid leukaemia (AML) is unclear.ObjectiveTo investigate the antitumor effect of suchilactone and its mechanism in AML.Materials and methodsThe effects of suchilactone on cell growth were detected by CCK-8 and flow cytometry. Network pharmacology was conducted to explore target of suchilactone. Gene expression was detected by western blot and RT-PCR. SHI-1 cells (1 × 10⁶ cell per mouse) were subcutaneously inoculated into the female SCID mice. Suchilactone (15 and 30 mg/kg) was dissolved in PBS with 0.5% carboxymethylcellulose sodium and administered (i.g.) to mice once a day for 19 days, while the control group received PBS with 0.5% carboxymethylcellulose sodium. Tumour tissues were stained with Ki-67 and TUNEL.ResultsSuchilactone exerted an effective inhibition on the growth of SHI-1 cells with IC₅₀ of 17.01 μM. Then, we found that suchilactone binds to the SHP2 protein and inhibits its activation, and suchilactone interacted with SHP2 to inhibit cell proliferation and promote cell apoptosis via blocking the activation of SHP2. Moreover, Suchilaction inhibited tumour growth of AML xenografts in mice, as the tumour weight decreased from 0.618 g (control) to 0.35 g (15 mg/kg) and 0.258 g (30 mg/kg). Suchilactone inhibited Ki-67 expression and increased TUNEL expression in tumour tissue.Discussion and conclusionsOur study is the first to demonstrate suchilactone inhibits AML growth, suggesting that suchilactone is a candidate drug for the treatment of AML.     

Poly(vinyl alcohol)/Plant Extracts Films: Preparation,Surface Characterization and Antibacterial Studies against Gram Positive and Gram Negative Bacteria

In this study, we aim to obtain biomaterials with antibacterial properties by combining poly(vinyl alcohol) with the extracts obtained from various selected plants from Romania. Natural herbal extracts of freshly picked flowers of the lavender plant (Lavandula angustifolia) and leaves of the peppermint plant (Mentha piperita), hemp plant (Cannabis sativa L.), verbena plant (Verbena officinalis) and sage plant (Salvia officinalis folium) were selected after an intensive analyzing of diverse medicinal plants often used as antibacterial and healing agents from the country flora. The plant extracts were characterized by different methods such as totals of phenols and flavonoids content and UV-is spectroscopy. The highest amounts of the total phenolic and flavonoid contents, respectively, were recorded for Salvia officinalis. Moreover, the obtained films of poly(vinyl alcohol) (PVA) loaded with plant extracts were studied concerning the surface properties and their antibacterial or cytotoxicity activity. The Attenuated Total Reflection Fourier Transform Infrared analysis described the successfully incorporation of each plant extract in the poly(vinyl alcohol) matrix, while the profilometry demonstrated the enhanced surface properties. The results showed that the plant extracts conferred significant antibacterial effects to films toward Staphylococcus aureus and Escherichia coli and are not toxic against fibroblastic cells from the rabbit.     

国产狭叶番泻叶的化学成分研究

目的:研究国产狭叶番泻叶Cassia angustifolia Vahl的化学成分,积累对照品,以便系统比较国产与进口狭叶番泻叶内在质量的异同,更好的开发利用国产番泻叶。方法:利用溶剂提取法和各种色谱方法进行分离纯化,根据理化性质和光谱数据进行结构鉴定。结果:分离鉴定了6个化合物:胆甾醇(Cholesterol,Ⅰ),山柰酚-3-芸香糖苷(Kampferol-3-rutinoside,Ⅱ),1,6-二羟基-3-甲基-xanthone-8-羧酸(Calyxanthone,Ⅲ),3-甲氧基-4-羟基苯甲酸(3-methoxy-4-hydorxy-benzoic acid,Ⅳ),对二甲氨基苯甲醛(P-dimethylaminobenzaldehyde,Ⅴ),3,4-二羟基苯甲酸(3,4-dihydroxybenzoic acid,Ⅵ)。结论:6个化合物均为首次从该植物中分离得到。     

Lavandula angustifolia and combination of Lavandula angustifolia and Zataria multiflora administration attenuates prenatal lead-exposed induced learning and memory impairments in male rats

This study evaluated the effects lavandula angustifolia (LAF) and its coadministration with Zataria multiflora (ZM) on the learning and memory of prenatal lead exposed adult male offspring rats. Pregnant rats received tap water containing 0.2% lead acetate throughout the gestation period. Two male offspring from each mother (2?months old, weighing 180–200?g) were randomly selected and were treated with saline, LAF (50, 100 &; 200?mg/kg/ip/20d), ZM (50, 200?mg/kg/ip/20d) and combination of effective and ineffective doses of LAF and ZM. The results showed spatial memory deficits in antenatally lead-exposed male offspring in Morris water maze test, which ameliorates following the effective doses of LAF and ZM methanolic extract via unknown mechanism(s).     

狭叶香蒲花粉(蒲黄)黄酮类成分的研究

自香蒲科(Typhaceae)植物狭叶香蒲(Typha augustifolia L.)的干燥花粉中分离到五个黄酮醇甙,包括两个黄酮醇-3-三糖甙(Ⅰ,Ⅱ)和三个黄酮醇-3-双糖甙(Ⅲ,Ⅳ,Ⅴ)。其中,化合物Ⅰ是一个新的黄酮醇甙,为本植物的主要成分,经光谱分析(UV,IR.MS;¹HNMR和¹³CNMR)和水解试验确定为异鼠李素-3-0-(2_G-α-L-鼠李糖基)-α-L-鼠李糖(1→6)-β-D-葡萄糖甙,命名为香蒲新甙(typhaneoside,Ⅰ)。其它四种为已知成分。Ⅱ从本属植物中首次发现。     

山芝麻属药学研究概况

在广泛检索文献的基础上,对山芝麻属的产地品种、成分、药理作用、临床应用等方面进行论述,为深入研究山芝麻属植物资源提供科研资料。     

应用大孔吸附树脂吸附分离技术制备蒲黄总黄酮的研究

考察13种大孔吸附树脂对蒲黄总黄酮的吸附分离性能,确定大孔吸附树脂吸附分离蒲黄总黄酮的工艺条件.以总黄酮吸附量、总黄酮含量和总黄酮回收率为考察指标,测定总黄酮含量采用紫外-可见分光光度法,考察泄露曲线采用薄层扫描法.结果表明AB-8型树脂对蒲黄总黄酮有良好吸附分离性能,其吸附分离蒲黄总黄酮的工艺条件为:蒲黄提取物上样浓度为20 mg/mL,蒲黄总黄酮最大吸附量为9.36 mg/mL,吸附流速为2 mL/min,洗脱剂为50%乙醇,洗脱剂用量为7倍量树脂体积,洗脱速度为2 mL/min,树脂可重复使用3次.AB-8型大孔吸附树脂在所确定的工艺条件下,可较好地吸附分离蒲黄总黄酮.其乙醇洗脱物中蒲黄总黄酮含量达45%以上,总黄酮回收率达85%以上.