姜黄素对动物实验性胃溃疡的影响研究

目的:观察姜黄素对实验性小鼠和大鼠胃黏膜损伤的影响.方法:将姜黄粉末用70%乙醇提取,石油醚脱脂的方法制备出姜黄醇提取物,采用硅胶吸附的方法从姜黄醇提物中制备得到姜黄素.采用冷水应激小鼠,乙醇诱导、幽门结扎等方法制作大鼠胃溃疡动物模型.按随机抽签法将动物各分为5组:姜黄乙醇提取物低剂量组、姜黄乙醇提取物中剂量组、姜黄乙醇提取物高剂量组、对照组和模型组,连续给药3天,处死动物后观察胃溃疡指数.结果:姜黄素对冷水应激小鼠胃黏膜损伤没有显著保护作用;姜黄素对乙醇诱导的小鼠胃黏膜损伤及结扎型大鼠胃黏膜损伤具有保护作用.结论:姜黄素对实验性动物胃溃疡具有保护作用,其机理可能是通过抗氧化实现的.     

舒肝丸治疗胃脘痛的实验研究

目的:研究舒肝丸(川楝子,延胡索,白芍,木香,厚朴,枳壳等)治疗胃脘痛的作用.方法:以热板法和扭体法观察其镇痛作用;以小鼠水浸应激性、利血平性及无水乙醇性胃溃疡模型观察舒肝丸对胃溃疡的保护作用;幽门结扎收集胃液,观察其对胃液分泌的影响;以小鼠胃排空及小肠推进方法观察舒肝丸对胃肠运动的影响.结果:舒肝丸可提高小鼠的热痛阈,减少小鼠的扭体次数;对小鼠水浸应激性、利血平性及无水乙醇性胃溃疡模型均有明显的保护作用;能抑制大鼠胃酸及胃蛋白酶的分泌,促进胃黏液的分泌;舒肝丸能抑制正常小鼠胃排空及新斯的明所致的胃排空和肠推进亢进,对阿托品所致的胃排空肠推进迟缓有协同作用,但不明显.结论:舒肝丸具有镇痛、抗胃溃疡、抑制胃酸分泌及胃平滑肌运动等作用.这些作用是其治疗胃脘痛的药理学基础.     

木香超临界提取物抗实验性胃溃疡的研究

目的:通过实验探讨木香超临界提取物对多种实验性胃溃疡模型的影响.方法:观察木香超临界提取物对大鼠盐酸-乙醇型急性胃溃疡、小鼠利血平型胃溃疡和大鼠醋酸损伤型慢性胃溃疡模型的作用.结果:木香超临界提取物对盐酸-乙醇型急性胃溃疡具有显著的抑制作用(P＜0.01);对小鼠利血平型胃溃疡和大鼠醋酸损伤型慢性胃溃疡均有明显的抑制作用(P＜0.05～0.01).     

温胃止痛方药效学研究

目的:研究温胃止痛方的药理作用。方法:采用大鼠幽门结扎型胃溃疡、盐酸乙醇型胃溃疡模型观察其对胃溃疡的抑制作用;采用改良酚红含量测定法、小肠炭末推进法观察对正常小鼠胃肠功能的影响;采用化学刺激法研究药物的镇痛抗炎作用。结果:温胃止痛方对大鼠幽门结扎性胃溃疡、盐酸乙醇型胃溃疡具有显著的抑制作用;能抑制正常小鼠胃排空,促进正常小鼠小肠推进功能;对醋酸和甲醛所致小鼠疼痛、醋酸所致小鼠腹腔毛细血管通透性增高具有明显抑制作用。结论:温胃止痛方具有抗溃疡、镇痛、抗炎等药理作用。     

姜黄醇提取物对实验性胃溃疡的影响

目的：研究姜黄醇提取物对小鼠和大鼠胃黏膜损伤的影响及对大鼠胃黏膜超氧化物歧化酶活性和丙二醛含量的影响。方法：姜黄70%乙醇浸提得姜黄醇提物。冷水应激制作胃溃疡模型,镜检小鼠胃黏膜损伤作为溃疡指标。大鼠行幽门结扎术制作胃溃疡模型,镜检测量胃黏膜出血损伤指数作为溃疡指标;检测胃黏膜超氧化物歧化酶活性与丙二醛含量。结果：与冷水应激组比较,姜黄醇提取物各组小鼠胃黏膜损伤明显减轻。同幽门结扎组比较,姜黄醇提取物各组大鼠胃黏膜损伤明显减轻,胃黏膜超氧化物歧化酶活性升高,丙二醛含量降低。结论：姜黄醇提取物能具有良好的抗胃溃疡作用,其抗胃溃疡机制可能与抑制丙二醛升高、提高超氧化物歧化酶活性有关。     

云木香不同提取物对小鼠胃排空和小肠推进功能的影响

目的:研究云木香3种提取物对小鼠胃排空和小肠推进功能的影响,并探讨云木香影响胃肠道的物质基础.方法:采用改良的酚红含量测定法观察云木香3种提取液对正常状态下、新斯的明所致的亢进状态下、阿托品所致的抑制状态下小鼠胃排空和小肠推进功能的影响.结果:挥发油能够显著降低正常小鼠胃酚红排空率(P＜0.01),能够显著提高阿托品所致抑制状态下的小鼠胃酚红排空率(P＜0.01),能够显著降低新斯的明所致亢进状态下的小鼠胃酚红排空率(P＜0.01),并降低小肠酚红推进率(P＜0.05).结论:云木香挥发油能够抑制正常小鼠胃排空,改善阿托品所致抑制状态下的小鼠胃排空障碍,拮抗新斯的明所致的小鼠胃排空和小肠推进功能亢进.挥发油是云木香对小鼠胃肠道起作用的物质基础.     

益智仁乙醇提取物对乙酸型胃溃疡大鼠EGF表达的影响

目的研究益智仁乙醇提取物对乙酸型胃溃疡大鼠的作用,并初步探讨其促进溃疡愈合的机制。方法建立大鼠乙酸型胃溃疡模型,观察益智仁乙醇提取物对大鼠乙酸型胃溃疡的作用;采用免疫组化染色法,观察益智仁乙醇提取物对大鼠乙酸型胃溃疡黏膜EGF表达的影响。结果 AOF能明显促进大鼠乙酸型胃溃疡的愈合,溃疡愈合率可达到62.5%;AOF能明显促进大鼠乙酸型胃溃疡边缘组织EGF的表达。结论 AOF能明显促进大鼠乙酸型胃溃疡的愈合,其机制可能与溃疡边缘组织EGF的表达有关。     

苗药一支箭乙醇提取物对乙酸型胃溃疡大鼠EGF表达的影响

目的：研究一支箭乙醇提取物对乙酸型胃溃疡大鼠的作用,并初步探讨其促进溃疡愈合的机制。方法：建立大鼠乙酸型胃溃疡模型,观察一支箭乙醇提取物对大鼠乙酸型胃溃疡的作用;采用免疫组化染色法,观察一支箭乙醇提取物对大鼠乙酸型胃溃疡粘膜EGF表达的影响。结果：EEO能明显促进大鼠乙酸型胃溃疡的愈合,溃疡愈合率可达到62.5%;EEO能明显促进大鼠乙酸型胃溃疡边缘组织EGF的表达。结论：EEO能明显促进大鼠乙酸型胃溃疡的愈合,其机制可能与溃疡边缘组织EGF的表达有关。     

复方丹蒲汤抗实验性胃溃疡的作用

目的:研究复方丹蒲汤(丹参、蒲公英、砂仁等)抗实验性胃溃疡的作用及其机制。方法:采用小鼠水浸应激性、利血平性、无水乙醇性、幽门结扎性胃溃疡模型观察复方丹蒲汤对胃溃疡的保护作用及对大鼠胃液分泌的影响;采用小鼠胃排空方法观察复方丹蒲汤对胃运动的影响;以热板法观察其镇痛作用。结果:复方丹蒲汤对小鼠水浸应激性、利血平性及无水乙醇性胃溃疡模型均有明显的保护作用;能抑制大鼠胃酸及胃蛋白酶的分泌,降低大鼠胃溃疡指数,减少溃疡面积;抑制小鼠胃排空;延长小鼠热刺激的痛反应时。结论:复方丹蒲汤具有抗实验性胃溃疡的作用。该作用可能与其抑制胃液分泌、胃平滑肌运动及镇痛作用有关。     

水黄皮根乙酸乙酯萃取物抗实验性胃溃疡的作用

目的:研究水黄皮根乙酸乙酯萃取物(Acetic ether extract from Pongamia pinnata Roots,PRA)抗实验性胃溃疡的作用及其机制。方法:采用小鼠利血平型、阿司匹林型及幽门结扎型胃溃疡模型观察PRA对胃溃疡的保护作用;采用大鼠乙醇模型观察PRA对胃黏膜组织超氧化物歧化酶(SOD)活性,丙二醛(MDA)和一氧化氮(NO)含量的影响;采用大鼠乙酸型胃溃疡模型观察PRA对溃疡愈合质量的影响,并通过放免法测定血清表皮生长因子(EGF)含量和免疫组化方法对检测胃组织EGF表达。采用小鼠胃排空方法,观察PRA对胃排空的影响。结果:PRA对小鼠利血平型、阿司匹林及幽门结扎型胃溃疡模型均有明显的保护作用;能抑制乙醇损伤所致胃黏膜组织SOD活性降低,MDA生成增多和NO减少;PRA能显著促进大鼠乙酸型胃溃疡愈合,能显著升高血清EGF水平,并促进胃溃疡周边组织EGF表达;抑制正常小鼠胃排空及新斯的明所致的胃排空亢进,但对阿托品所致的胃排空延缓协同作用不明显。结论:PRA具有抗实验性胃溃疡的作用。该作用可能与抑制胃黏膜组织SOD活性降低,MDA生成增多和NO减少,增加EGF表达和抑制胃平滑肌运动有关。     

竹节人参提取物抗实验性大鼠胃溃疡作用的实验研究

目的:观察竹节人参提取物对大鼠实验性胃溃疡的保护作用。方法:采用大鼠实验动物,造成大鼠幽门结扎型、无水乙醇型、冷应激型和消炎痛型溃疡模型,观察竹节人参提取物2g/kg、1g/kg 剂量下,对大鼠幽门结扎型、无水乙醇型、冷应激型和消炎痛型溃疡的作用,并结合与渍疡发病密切相关的胃蛋白酶活性、胃酸、胃溃疡发生面积等因素,检测出竹节人参提取物对它们的影响。结果:竹节人参提取物2g/kg、1g/kg 剂量下能明显控制大鼠幽门结扎型、无水乙醇型、冷应激型和消炎痛型溃疡的形成(P<0.01),减少溃疡形成面积(P<0.01)。结论:竹节人参提取物对治疗大鼠实验性胃溃疡具有良好的疗效,初步阐明了其抗溃疡的基本药理作用。     

西藏地产藏药大叶秦艽的抗溃疡病作用研究

目的观察西藏地产藏药大叶秦艽的抗溃疡病作用,同时研究其初步作用机理。方法采用预防性给药,观察大叶秦艽乙醇提取物(石油醚脱脂)组分对阿司匹林诱导大鼠胃溃疡模型及无水乙醇诱导大鼠胃粘膜损伤胃溃疡模型的作用。结果西藏地产藏药大叶秦艽乙醇提取物(石油醚脱脂)组分能明显缩小阿司匹林及乙醇诱导大鼠胃溃疡模型的溃疡面积,大剂量有减少胃液总量作用和胃蛋白总量分泌作用,与对照组相比有显著性差异。结论该提取物有预防溃疡病作用,其机理有待进一步研究。     

Effect of Commiphora opobalsamum (L.) Engl. (Balessan) on experimental gastric ulcers and secretion in rats

The ulcer protective potential of an ethanol extract of Commiphora opobalsamum (L.) Engl. (Burseraceae) 'Balessan' was assessed against different acute gastric ulcer models in rats induced by necrotizing agents (80% ethanol, 0.2M NaOH and 25% NaCl), hypothermic restraint stress, pyloric ligation (Shay) and indomethacin. Balessan, 250 and 500 mg/kg administered orally (intraperitoneally in Shay rat model) showed a dose-dependent ulcer protective effects in all the above ulcer models. Besides, the extract offered protection against ethanol-induced depletion of stomach wall mucus and reduction in nonprotein sulfhydryl (NP-SH) concentration. Ethanol treatment also caused histopathological lesions of the stomach wall. Pretreatment with Balessan extract provided a complete protection of gastric mucosa through supporting both the offensive and defensive factors. Balessan extract was also showed a large margin of safety without any apparent adverse effects in rats.     

The gastroprotective activity of the ethanol extract of Ageratum conyzoides

The ethanol extract of Ageratum conyzoides was evaluated for gastroprotection in rats using the Ibuprofen, ethanol and cold restraint stress ulcer models. Efficacy was assessed by determination of mean ulcer size, ulcer number and ulcer index. Oral administration of the ethanol extract at dose levels of 500 and 750 mg/kg significantly protected gastric lesions by 80.59 and 89.33%, respectively, as compared to Misoprostol (74.43%) in the Ibuprofen model; by 97.09 and 99.24%, respectively, in the cold stress model as compared to Famotidine (77.86 and 92.71%) and by 86.58 and 92.29%, respectively, in the alcohol model. The findings suggest that the significant gastroprotective activity could be mediated by its antioxidant activity, Ca(2+) channel blocking and antiserotogenic properties.     

野甘草乙醇提取物治疗大鼠胃溃疡作用的研究

目的研究野甘草乙醇提取物对胃溃疡的治疗作用。方法通过醋酸烧灼法制成大鼠胃溃疡模型,按照同窝同性、体质量配对分为2组,实验组每只以野甘草乙醇提取物1 g/(kg.d)喂养,共喂30 d;对照组不喂药。30 d后剖腹取胃,测定溃疡体积。结果实验组大鼠胃溃疡体积小于对照组(P<0.05)。结论野甘草乙醇提取物对大鼠胃溃疡有治疗作用,应对其药理作用进行更深入的研究。     

"木香-槟榔"制剂对大鼠胃肠运动的影响

目的 观察木香、槟榔单独及配伍使用对大鼠胃肠运动的影响。方法 采用胃饲树脂小球并计数的方法计算胃排空率及采用高灵敏度应片传感器记录在体胃和离体十二指肠运动在用药(木香、槟榔、木香—槟榔)前后的改变。结果 单味木香制剂不能加快大鼠胃排空;使用单味槟榔和木香—槟榔制剂后胃排空率均快于对照组(P＜0．05,P＜0．001),但前者作用弱于后者(P＜0.05)。木香、按榔、木香—槟榔制剂均使胃运动加快,木香、槟榔的作用较木香—核榔制剂小(P＜0．001)。木香使离体十二指肠运动减弱,槟榔和木香—槟榔制剂则增强十二指肠运动,前者的作用较后者弱。结论 木香—槟榔配伍使用能增强胃肠运动,效果好于单独用药。     

半四左方对胃溃疡大鼠血清胃泌素和一氧化氮的影响

目的:观察半四左方对大鼠实验性胃溃疡和血清胃泌素(GAS)和一氧化氮(NO)的影响,探讨半四左方抗胃溃疡损伤的作用机制.方法:采用束缚水浸应激法和醋酸法建立大鼠胃溃疡模型.经半四左方干预后(含生药6.3 g·kg-1,水浸应激法造模前连续ig15 d,醋酸法造模后连续ig5 d,测定水浸应激溃疡大鼠溃疡指数、醋酸型溃疡大鼠溃疡面积、以及2个溃疡模型大鼠血清GAS,NO水平.结果:半四左方可显著降低束缚水浸应激溃疡大鼠溃疡指数(P＜0.01)和醋酸型溃疡大鼠溃疡面积(P＜0.01),并能降低胃溃疡大鼠异常升高的血清GAS,NO(P ＜0.01),使之恢复至接近正常水平.结论:半四左方具有明显的抗胃溃疡作用,其作用机制可能与其影响大鼠血清GAS和NO水平有关.     

水黄皮根抗实验性胃溃疡活性部位的筛选研究

目的：对水黄皮根抗实验性胃溃疡的有效部位进行筛选。方法：采用大鼠无水乙醇胃黏膜损伤模型和小鼠利血平型胃溃疡模型,观察水黄皮根乙醇总提取物和不同极性萃取部位对胃黏膜的影响。结果：水黄皮根乙醇提取物、醋酸乙酯和正丁醇萃取部位都能明显抑制无水乙醇和利血平对胃黏膜的损伤。其对无水乙醇模型的损伤抑制率分别是86.4%,85.4%,11.5%,对利血平模型的溃疡抑制率分别是37.8%,33.8%,19.7%。结论：水黄皮根乙醇提取物、醋酸乙酯和正丁醇萃取物具有明显抗实验性胃溃疡作用,作用最强的部位是醋酸乙酯萃取部位。     

Gastroprotective effect of standardized extract of Ficus glomerata fruit on experimental gastric ulcers in rats

ETHNOPHARMACOLOGICAL RELEVANCE: Traditionally fruits of Ficus glomerata Roxb (Family: Moraceae) are used to treat anemia and gastrointestinal disorders. AIM: Gastroprotective effect of 50% ethanolic extract of F. glomerata fruit (FGE) was studied in different gastric ulcer models in rats. METHODS: FGE (50, 100 and 200 mg/kg body weight) was administered orally, twice daily for 5 days for prevention from pylorus ligation (PL), ethanol (EtOH) and cold restraint stress (CRS)-induced ulcers. Estimation of H+K+ATPase activity and gastric wall mucous were performed in EtOH-induced ulcer and antioxidant enzyme activities in supernatant mitochondrial fraction of CRS-induced ulcers. RESULTS: FGE showed dose dependent inhibition of ulcer index in pylorus ligation, ethanol and cold restraint stress-induced ulcers. FGE prevents the oxidative damage of gastric mucosa by blocking lipid peroxidation and by significant decrease in superoxide dismutase, H+K+ATPase and increase in catalase activity. High performance thin layer chromatography (HPTLC) analysis showed the presence of 0.57% and 0.36% w/w of gallic acid and ellagic acid in FGE. CONCLUSIONS: Our results show that F. glomerata possess significant gastroprotective activity which might be due to gastric defence factors and phenolics might be the main constituents responsible for this activity.     

Gastric antisecretory and cytoprotective effects of hydroalcoholic extracts of Plumeria alba Linn. leaves in rats

OBJECTIVE:This study was conducted to evaluate the antiulcerogenic property of hydroalcoholic extract obtained from the leaves of Plumeria alba Linn.METHODS:Antiulcer assays were performed using the protocols of ulcer induced by nonsteroidal anti-inflammatory drugs,ethanol and pylorus ligation.The hydroalcoholic extract(HAPA),and various fractions of HAPA like,n-hexane extract(HPA),ethyl acetate extract(EAPA) and n-butanol extract(BPA) were administered at doses of 200 and 400 mg/kg for HAPA and 100 and 200 mg/kg for fractions of extracts.Parameters of gastric secretion(volume,pH,total protein,and free and total acidity) were determined by the pylorus ligation model.Parameters like aspartate aminotransferase and alanine aminotransferase were also determined in ethanolinduced ulcer model.To determine the mechanism of action,role of nitric oxide was also evaluated.RESULTS:EAPA and BPA(100 and 200 mg/kg,p.o.) showed gastric ulcer-healing effect in indomethacin-induced ulcer model,while HAPA(200 mg/kg) and HPA showed no significant antiulcer effect.Both EAPA and BPA showed gastric cytoprotective effect in ethanol-induced gastric ulcer and inhibited gastric secretion in pylorus-ligated rats.CONCLUSION:The results of the present study show that some hydroalcoholic extract of Plumeria alba L.displays antiulcer activity,as demonstrated by the significant inhibition of ulcer formation induced by different models,which is consistent with the literature report in folk medicine.