银叶树树叶中的黄酮类化合物

目的研究银叶树Heritieralittoralis D.的化学成分.方法利用硅胶柱层析进行分离和纯化,并通过波谱分析鉴定结构.结果从银叶树的叶子中分离鉴定了8个黄酮类化合物,分别为栎皮苷(quercitrin 1),槲皮素(quercetin 2),山柰酚-3-O-(6"-0-E-p-香豆酰基)-β-D-吡喃葡萄糖(kaempferol-3-O-(6"-O-E-p-coumroyl)-β-D-gluco-pyranoside 3),山柰酚(kaempferol 4),山柰苷(kaempferitrin5),杨梅黄酮(myricetin 6),圣草酚(eriodictyol 7)和儿茶素(catechin 8).结论化合物2-8首次从该植物中分离得到.     

甘草中黄酮的超声提取及含量测定

目的：提取甘草中的黄酮．并测定其含量。方法：运用超声技术提取甘草黄酮．用比色法测定黄酮含量。结果：室温下超声提取80min较为合适。此时黄酮的含量为1．311％．平均回收率为99．10％．RSD=0．90％(n=6)。结论：运用超声技术提取甘草黄酮速度较快，实验结果令人满意。     

球花石斛的化学成分研究(Ⅰ)

目的：研究兰科植物球花石斛的化学成分，以探明其有效成分并为制定中药石斛质量标准提供科学依据。方法：采用硅胶、Sephadex LH-20及RP-C18等色谱技术分离纯化化合物，根据理化性质、光谱数据鉴定结构。结果：从球花石斛乙醇提取物的乙酸乙酯部位分离得到芴酮类、联苄类、菲类及黄酮类13个化合物，分别鉴定为4，7-二羟基-5-甲氧基芴酮(Ⅰ)、1，4，7-三羟基-5-甲氧基芴酮(Ⅱ)、2，4，7-三羟基-4-甲氧基芴酮(Ⅲ)、2，5，9-三羟基-4-甲氧基芴(Ⅳ)、4，4‘-二羟基-3，3‘，5，-三甲氧基联苄(V)、5，4‘-二羟基-3，3‘-二甲氧基联苄(Ⅵ)、3，5，4‘-三羟基-3‘-甲氧基联苄(Ⅶ)、2，5-二羟基-4-甲氧基菲(Ⅷ)、2，5-二羟基-4-甲氧基-9，10-二氢菲(Ⅸ)、二氢麦黄酮(X)、柯伊利素(Ⅺ)、高北美圣草素(Ⅻ)、柚皮素(XⅢ)。结论：化合物Ⅸ，X，Ⅺ为首次从石斛属中分离得到，其它化合物均为首次从该种植物中分离得到.     

三七叶中微量活性皂苷的分离与鉴定

对三七叶中微量活性皂苷进行分离与鉴定.三七叶总苷经硅胶柱层析及薄层层析分离纯化,获得4个微量皂苷成分.经理化性质、光谱分析与标准品对照确定其化学结构分别为人参皂苷C-K(Ⅰ)、人参皂苷-Rh1(Ⅱ)、人参皂苷-MC(Ⅲ)和三七皂苷-Fe(Ⅳ).化合物Ⅰ为首次从三七叶中分得.     

Chemical composition,antioxidant activity and hepatoprotective potential of Rourea induta Planch. (Connaraceae) against CCl4-induced liver injury in female rats

ObjectivesThe aim of this study was to evaluate the flavonoid content of an ethanolic leaf extract from the medicinal plant Rourea induta Planch. (RIEE) and to investigate its hepatoprotective potential and in vivo antioxidant effects.MethodsUsing samples from carbon tetrachloride-treated Wistar female rats treated orally with or without RIEE, we evaluated the aspartate aminotransferase, alanine aminotransferase, and total bilirubin levels in plasma; the levels of the hepatic oxidative stress markers catalase, superoxide dismutase, glutathione peroxidase, and reduced glutathione in liver homogenates; and the thiobarbituric acid reactive substance levels. A histopathology study was performed. A quantitative analysis of the RIEE extract was performed using high-performance liquid chromatography to evaluate its flavonoid content.ResultsOral administration of RIEE significantly reduced carbon tetrachloride-induced elevations in the levels of plasma markers of hepatic damage and lipid peroxidation. It also rescued histopathologic alterations observed in the liver and levels of oxidative stress markers.ConclusionsRIEE exhibits antioxidant and hepatoprotective activities in vivo, which may be attributable to its flavonoids composition [hyperin (2), quercetin-3-O-β-xyloside (4), quercetin-3-O-α-arabinofuranoside (5), and quercetin (6)].     

疏风解毒胶囊联合环丙沙星与维生素C治疗肺风粉刺的临床观察

目的 评价疏风解毒方联合环丙沙星与维生素C治疗肺风粉刺的临床疗效和愈后。方法 将60例痤疮中医辨证为肺经风热型的患者随机分成治疗组与对照组各30例，对照组给予外用盐酸环丙沙星和口服VitC，治疗组在对照组的基础上同时给予疏风解毒胶囊，两组疗程均为1个月。两组分别在治疗2、4周时评价系统症状（口干、便秘等）和皮损炎症好转情况、新发皮损情况、愈后（出现色素沉着和凹陷性瘢痕）情况、临床总有效率，同时考察两组不良反应以评价其安全性。结果 两组治疗后临床疗效对比，治疗组总有效率为96.67%高于对照组的76.67%（P<0.05）。治疗两周后，治疗组口渴、便秘等系统症状减轻例数、皮损处红肿消退例数分别为26例、24例，对照组为4例、7例，治疗组的症状减轻人数明显多于对照组，差异有显著统计学意义（P<0.01）；且两周后治疗组有新发皮损数明显少于对照组，差异有显著统计学意义（P<0.01）。结论 疏风解毒方联合环丙沙星与维生素C在治疗痤疮肺经风热证上疗效显著，愈后理想。     

Wound healing effect of flavonoid rich fraction and luteolin isolated from Martynia annua Linn. on streptozotocin induced diabetic rats

ObjectiveTo evaluate wound healing potential of flavonoid fractions of Martynia annua (M. annua) Linn. leaves in diabetic rats on the basis of folkloric information and preliminary study.MethodsThe flavonoid compound luteolin and apigenin were isolated from dried leaves of plant by column chromatography. The two concentrations (0.2% and 0.5% w/w) of luteolin and flavonoid fraction were selected for topically applied as ointment on diabetic wound. The Povidone Iodine Ointment USP was used as a reference. On 18th days, protein content, hydroxyproline and antioxidants (SOD, CAT and GSH) level in granuloma tissues were determined.ResultsThe results showed that, percent wound contraction were observed significantly (P<0.01) greater in MAF fraction and 0.5% w/w of luteolin treatment groups. Presence of matured collagen fibres and fibroblasts with better angiogenesis were observed in histopathological studies.ConclusionsIn conclusion, our findings suggest that flavonoid fraction (MAF) and luteolin (0.5% w/w) may have potential benefit in enhancing wound healing in diabetic condition, possibly due to free-radical scavenging activity of plant.     

Xenoestrogens challenge 17β-estradiolprotectiveeffects in colon cancer Marino M简

Several epidemiological, cellular, and molecular studies demonstrate the role of environmental chemicals with endocrine disrupting activities, typical of Westernized societies, in the pathogenesis of numerous diseases including cancer. Nonetheless this information, the design and execution of studies on endocrine disruptors are not yet cognizant that the specific actions of individual hormones often change with development and ageing, they may be different in males and females and may be mediated by different receptors isoforms expressed in different tissues or at different life stages. These statements are particularly true when assessing the hazard of endocrine disruptors against 17β-estradiol (E2) actions in that this hormone is crucial determinant of sex-related differences in anatomical, physiological, and behavioral traits which characterize male and female physiology. Moreover, E2 is also involved in carcinogenesis. The oncogenic effects of E2 have been investigated extensively in breast and ovarian cancers where hormone-receptor modulators are now an integral part of targeted treatment. Little is known about the E2 preventive signalling in colorectal cancer, although this disease is more common in men than women, the difference being more striking amongst pre-menopausal women and age-matched men. This review aims to dissect the role and action mechanisms of E2 in colorectal cancer evaluating the ability of estrogen disruptors (i.e., xenoestrogens) in impair these E2 actions. Data discussed here lead to define the possible role of xenoestrogens in the impairment and/or activation of E2 signals important for colorectal cancer prevention.     

Rootstock effect on serotonin and nutritional quality of tomatoes produced under low temperature and light conditions

In this study, we explored the capacity of different tomato rootstocks to improve the nutritional value of tomatoes grown in a greenhouse during the winter–spring period under low temperature and light conditions. The results showed that relative to nongrafted plants, some grafted rootstocks either did not affect or had detrimental effects on the nutritional parameters measured. In addition, the amount of serotonin was significantly lower in tomatoes from all grafted rootstocks than in tomatoes from the nongrafted plants. Nevertheless, relative to the nongrafted plants, some grafted treatments increased total macroelements (by 1.16 times), total microelements (by 1.43 times), protein content (by 17%), free total and essential amino acids (by respectively 23% and 19%), total phenolic compounds (by 11%), vitamin C (by 13.8%), lycopene (by 48%), and also total hydrocinnamic acids (by 67%) and flavonoids (by 279%). As the grafted treatments did not increase the tomato yield, we hypothesize that these compounds accumulated in the tomatoes due to the lack of increased biomass, which prevented a dilution effect on the compounds of interest in the fruits.