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Flowers of Spartium junceum L. (Fabaceae) are used for the treatment of gastric ulcers in Turkish folk medicine. Through bioassay-guided fractionation using chemical and chromatographical means and water immersion and restraint-induced stress ulcer model in rats, a saponin fraction was determined as the potent anti-ulcerogenic ingredient. The active fraction was also highly effective in preventing ethanol- and pyloric ligation-induced gastric lesions as well as inhibiting gastric secretion volume, gastric pH and titratable acidity, but did not affect the hexosamine content of the gastric mucosa. A novel oleanen-type triterpenic saponin, named as spartitrioside, was isolated as the active principle by using chromatographical separation techniques. 相似文献
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Aim of the study
Quassia amara L. is commonly used in Costarican folk medicine. It has been used for the treatment of a broad range of gastrointestinal symptoms such as dyspepsia, gastritis and constipation. In this study, the gastroprotective activity of two standardized extracts of Quassia amara L., Lipro® and Ligas®, was evaluated.Materials and methods
Anti-ulcerogenic properties were evaluated in female rats under acute ulcer-induction models (ethanol, indomethacin and hypotermic restraint). To get a deeper insight in the anti-ulcerogenic properties of the extracts, Ligas® was evaluated in the Shay rat model. Five parameters were estimated with this model: gastric mucus barrier, non-protein sulfhydril groups (NPSG) in the gastric mucosa, and pH, total acidity and peptic activity of the gastric juice.Results
Induction of ulcers by 95% ethanol (0.5 mL per os), indomethacin (100 mg/kg s.c.) and stress (2 h in hypothermic restraint) was inhibited significantly with administration of Lipro® (p < 0.05), in a dosage range from 4.9 mg/kg/d to 48.9 mg/kg/d. Treatment was given for one week. The extract Ligas® showed a significant augmentation of NPSG (p < 0.05) in a dosage range from 4.0 to 39.7 mg/kg. Ligas® did not produce a significant change (p > 0.05) in the other indicators.Conclusions
Quassia amara L. standardized extracts, Lipro® and Ligas®, showed an important anti-ulcerogenic effect in acute ulcer induction models. Their effect was related to an increase in gastric barrier mucus and non-protein sulfhydril groups. 相似文献3.
Samsul Alam Mohammed Asad Syed Mohammed Basheeruddin Asdaq V. Satya Prasad 《Journal of ethnopharmacology》2009
Aim of the study
Momordica charantia L. (Cucurbitaceae) commonly known as ‘bitter gourd’ is a multi purpose herb cultivated in different parts of the world for its edible fruits. The objective of the present study was to evaluate the effect of standardized methanolic extract of Momordica charantia L. fruits on gastric and duodenal ulcers.Materials and methods
The effect was evaluated in acetic acid induced chronic gastric ulcer, pylorus ligation induced gastric ulcer, ethanol induced gastric ulcer, stress induced gastric ulcer, indomethacin induced gastric ulcer and cysteamine induced duodenal ulcer model. The extract was administered orally at two different doses of 100 mg/kg and 500 mg/kg.Results
The healing of acetic acid induced gastric ulcer was increased by both doses of the extract. In pylorus-ligated rats, the extract showed significant decrease in ulcer index, total acidity, free acidity and pepsin content and an increase in gastric mucosal content. The extract also reduced the ulcer index in stress induced, ethanol induced and indomethacin induced gastric ulcers and cysteamine induced duodenal ulcer.Conclusion
The methanolic extract of Momordica charantia L. fruit increases healing of gastric ulcer and also prevents development of gastric ulcers and duodenal ulcers in rats. 相似文献4.
目的研究小叶杜鹃Rhododendron lapponicum花的化学成分。方法采用硅胶柱色谱、反相高效液相色谱、葡聚糖凝胶色谱等方法进行分离纯化,根据理化性质和波谱技术手段鉴定化合物的结构。结果从小叶杜鹃花甲醇提取物中分离得到了13个化合物,分别鉴定为1,1,4a,6-四甲基-2,8-二羟基-2,3,4,4a,9,9a-1H-六氢二苯并吡喃-5-甲酸甲酯(1)、伞形花内酯(2)、莨菪亭(3)、4′,5,7-三羟基黄烷酮(4)、8-去甲杜鹃素(5)、杜鹃素(6)、槲皮素(7)、芦丁(8)、松树脂醇二甲醚A(9)、对羟基苯甲酸(10)、3,5-二羟基甲苯(11)、齐墩果烷(12)和曲酸(13)。结论化合物1为1个新化合物,为六氢二苯并吡喃类化合物,命名为小叶杜鹃素I;化合物9、11和13为首次从杜鹃属植物中分离得到。 相似文献
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目的探究丹参与红花有效成分的不同配伍组方对大鼠脑缺血再灌注损伤的保护作用。方法选取成年雄性SD大鼠,通过大脑中动脉线栓法建立脑缺血再灌注模型,随机分成假手术组、模型组、阳性对照组(丹红注射液2 m L/kg)以及采用正交试验法L9(34)对丹参与红花主要有效成分[丹参素、丹酚酸A、丹酚酸B、羟基红花黄色素A(HYSA)]剂量配伍9组。大鼠尾iv给药,每天1次,连续给药3 d后进行神经功能缺损评分;实时荧光定量PCR法检测大鼠大脑皮层中葡萄糖调控蛋白78(GRP-78)、核转录因子-κB p65(NF-κB p65)、内质网源性转录因子(CHOP)、肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)m RNA表达;HE染色检测大鼠大脑皮层病理变化;免疫组化法检测大鼠大脑皮层中NF-κB p65蛋白的表达情况。结果与模型组比较,丹红注射液、丹参与红花主要有效成分配伍可显著降低脑缺血再灌注大鼠的神经功能评分,使大鼠大脑皮层GRP-78 m RNA表达水平升高,NF-κB p65、CHOP、TNF-a、IL-6 m RNA表达水平降低,抑制大脑皮层中NF-κB p65蛋白表达。丹参与红花主要有效成分配伍9组中第4组(丹参素30 mg/kg、丹酚酸A 2.5 mg/kg、丹酚酸B 16mg/kg、HYSA 8 mg/kg)、第6组(丹参素30 mg/kg、丹酚酸A 10 mg/kg、丹酚酸B 8 mg/kg、HYSA 4 mg/kg)对大鼠脑缺血再灌注损伤的保护作用更为显著。结论丹参与红花有效成分各配伍组方均能对脑缺血再灌注损伤大鼠内质网应激、炎症等方面起良好的保护作用。 相似文献
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该文以三七、白及药对为研究对象,采用HPLC测定三七单煎液及不同配伍比例(1∶0.5,1∶1,1∶2)三七与白及合煎液中具有脂肪酶抑制作用的活性成分——(20S)-人参皂苷Rg3和人参皂苷Rh4的含量,并探讨两药配伍后对三七皂苷成分含量的影响。色谱方法为Lichrospher C18(4.6 mm×250 mm,5μm)色谱柱;流动相为乙腈-水梯度洗脱;检测波长为203 nm;柱温为30℃;流速为1 m L·min-1。结果发现,与三七单煎液相比,三七、白及合煎液中人参皂苷Rg3、人参皂苷Rh4的含量均呈上升趋势,且上升幅度与配伍白及量呈正比;合煎液中人参皂苷Rb1、人参皂苷Rg1、三七皂苷R1的色谱峰均较三七单煎液的明显降低。研究结果表明三七与白及配伍后,合煎液中(20S)-人参皂苷Rg3、人参皂苷Rh4的含量较单煎液显著增加,推测白及中的有关成分可促进其它人参皂苷进行转化,该结果为拓展制备(20S)-人参皂Rg3、人参皂苷Rh4的方法提供参考。 相似文献
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目的研究虎杖Polygonum cuspidatum花的化学成分。方法利用溶剂提取、硅胶柱色谱和Sephadex LH-20反复进行分离纯化,根据波谱数据和理化性质鉴定化合物结构。结果从虎杖花甲醇提取物的乙醚、甲醇萃取部分分离得到16个化合物,分别鉴定为β-谷甾醇(1)、芦荟大黄素(2)、大黄素甲醚(3)、大黄素(4)、胡萝卜苷(5)、大黄酚(6)、槲皮素(7)、山柰酚(8)、蒽醌苷B(9)、大黄酸(10)、芹菜素(11)、橙皮素(12)、4-羟基苯乙酮(13)、芦丁(14)、蔗糖(15)、染料木素(16)。结论化合物2、8、12、13、15、16为首次从虎杖花中分离得到。 相似文献
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目的研究外源激素、水杨酸、茉莉酸甲酯对海巴戟天悬浮细胞生长及蒽醌类化合物合成的影响。方法建立海巴戟天细胞悬浮培养体系,并向海巴戟天细胞悬浮培养物中添加外源激素、水杨酸和茉莉酸甲酯,测定细胞比生长速率和蒽醌产量。结果外源激素萘乙酸(NAA)、激动素(KT)对海巴戟天悬浮细胞的生长和蒽醌类化合物的合成有显著影响,采用B5培养基时,较佳激素组合为NAA 2 mg/L+KT 0.1 mg/L。在对数生长初期(培养9 d)时,添加200μmol/L水杨酸和50μmol/L茉莉酸甲酯,蒽醌质量浓度分别为588.34 mg/L和595.49 mg/L,比对照分别提高了17.05%和18.47%。结论适宜激素配比结合一定质量浓度的水杨酸和茉莉酸甲酯外源诱导对蒽醌类化合物的合成有促进作用。 相似文献
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目的研究适于怀地黄Rehmannia glutinosa遗传转化的激素质量浓度和潮霉素质量浓度。方法以地黄无菌苗叶片为外植体,以根癌农杆菌介导的叶盘法进行转化,分析了潮霉素和乙酰丁香酮(AS)对抗性愈伤诱导率和再生芽分化效率的影响。结果潮霉素的质量浓度对抗性愈伤和抗性芽的产生影响很大,影响抗性愈伤诱导的临界质量浓度为9 mg/L,影响抗性芽分化的临界质量浓度为6 mg/L,适宜于进行地黄遗传转化的质量浓度为12 mg/L。侵染培养基和共培养培养基中添加100μmol/L的AS可以极显著提高转化效率。PCR扩增和β-葡萄糖苷酶(GUS)染色结果表明,外源基因成功整合到地黄基因组中。结论建立了有效的怀地黄稳定遗传转化再生体系,为地黄的分子生药学研究和遗传改良奠定基础。 相似文献
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目的对龙须藤多甲氧基总黄酮(PMFBC)的小鼠急性毒性及抗胃溃疡作用进行评价。方法以Bliss法测定PMFBC的半数致死量(LD50),评价其急性毒性;采用吲哚美辛、乙醇、水浸应激3种胃溃疡模型评价PMFBC对小鼠急性胃溃疡的保护作用。结果 PMFBC ig给药对小鼠的LD50值为1 256.319 mg/kg,表现出一定的急性毒性;PMFBC对3种胃溃疡模型均有较好的保护作用,可使小鼠胃溃疡面积明显减小,具有较高的溃疡抑制率。结论 PMFBC对小鼠胃溃疡的形成具有明显抑制作用,在一定剂量范围内可安全使用。 相似文献
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目的提高射干Belamacanda chinensis种子及幼苗在盐胁迫条件下的抗逆能力。方法采用外施亚精胺(ALA)处理,对在盐胁迫下射干种子的萌发及幼苗叶片光合特性各指标进行研究。结果 100 mmol/L NaCl胁迫下射干种子萌发受到严重影响,通过施加ALA(25~100 mg/L)处理,射干种子的各项指标都有所恢复,其中经过75 mg/L ALA处理的效果最为显著,各项指标均达最大值。外源ALA也显著提高了幼苗叶片中叶绿素a、叶绿素b、总叶绿素、类胡萝卜素的量,提高了最大荧光(Fm)、最大光化学效率(Fv/Fm),PSII有效光化学效率(Fv′/Fm′),PSII实际光化学效率(ΦPSII)、光化学淬灭系数(qP),有效降低了非光化学淬灭系数(NPQ)和热耗散速率(HDR),经过ALA处理后光化学反应能量(P)所占的比例显著升高,天线色素热耗散能量(D)和非光化学耗散能量(E)则表现出降低趋势。结论外源ALA能够提高射干种子的萌发指数,提高幼苗叶片中光合色素量,促进了能量的合理分配,减少激发过剩能量的耗散,提高光合电子传递效率,有效缓解盐胁迫对射干幼苗PSII系统的伤害,提高植株抗胁迫能力。 相似文献