Studies on the antiulcer activity of Moringa oleifera leaf extract on gastric ulcer models in rats

The methanol fraction of M. oleifera leaf extract was found to possess significant protective actions in acetylsalicylic acid, serotonin and indomethacin induced gastric lesions in experimental rats. A significant enhancement of the healing process in acetic acid—induced chronic gastric lesions was also observed with the extract-treated animals.     

The antiulcer activity of Garcinia cambogia extract against indomethacin-induced gastric ulcer in rats.

Garcinia cambogia extract is a herbal preparation that has been suggested as useful in the treatment of gastrointestinal disorders. In the present study this drug was tested for its antiulcerogenic effect. Oral pretreatment with Garcinia cambogia fruit extract (1 g/kg body wt/day) for 5, 10 or 15 days protected the gastric mucosa against the damage induced by indomethacin (20 mg/kg body wt). The volume and acidity of the gastric juice decreased in the pretreated rats. The glycoprotein levels of the gastric contents which were decreased in the untreated rats, maintained near normal levels in the pretreated rats. Protein which was elevated in the gastric juice of untreated rats, showed near normal levels in the pretreated rats. Garcinia cambogia was able to decrease the acidity and to increase the mucosal defence in the gastric areas, thereby justifying its use as an antiulcerogenic agent.     

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。     

Quercetin and naringenin; effects on ulcer formation and gastric secretion in rats

The antiulcerogenic effect of two flavonoids, quercetin and naringenin, in acute gastric ulcer (cold-restraint and pylorus-ligated) has been investigated. In both models quercetin and naringenin presented a significant decrease in ulcer index with respect to the control group. Nevertheless, in the Shay-ligated method no decrease in either volume, acidity or pepsin were observed, however, a significant difference was found in histamine secretion values.     

平溃散对急性胃溃疡及胃黏膜损伤的保护作用

目的:研究平溃散(绞股蓝,沙棘等)对抗急性溃疡的作用.方法:采用组织胺和消炎痛法建立大鼠实验模型,测量溃疡面积和胃黏液的量.结果:平溃散对组胺引起的急性溃疡有一定的抑制作用,对消炎痛引起的胃黏膜分泌的减少有一定的抑制作用.结论:平溃散具有抗溃疡、保护胃黏膜的作用.     

Studies on the effects of Pluchea indica less root extract on gastroduodenal ulcer models in rats and guineapigs

The methanolic fraction of P. indica root extract was found to possess significant antiulcer activity in different experimental animal models. In preventive antiulcer tests, significant protective actions in acetylsalicylic acid, serotonin and indomethacin-induced gastric lesions were observed in experimental rats. The extract also afforded significant protection to chemically-induced duodenal lesion in guineapigs. Significant enhancement of healing process in acetic acid-induced chronic gastric lesions were also observed in the extract-treated animals.     

吴茱萸抗大鼠应激性胃溃疡研究

[目的]研究吴茱萸对大鼠应激性胃溃疡的作用及其可能的机制。[方法]实验分为空白对照组、水浸-束缚应激性(WRS)胃溃疡模型组及模型加吴茱萸生药0.45 g/kg体质量组、0.9 g/kg体质量组和1.8 g/kg体质量组,计算各组大鼠胃溃疡指数;采用高效液相色谱-电化学法(HPLC-ECD)检测大鼠血清肾上腺素(E)水平。[结果]吴茱萸0.45 g/kg组能显著降低溃疡指数(P0.05)抑制溃疡形成。与模型组相比吴茱萸给药组均能显著抑制血清中E含量(P0.05)。[结论]吴茱萸具有抗大鼠应激性胃溃疡的作用,其作用机制可能与调节血清中E含量有关。     

芩连合剂对实验性胃溃疡大鼠胃黏膜保护作用的机制研究

目的探讨芩连合剂(QLHJ)对急性胃溃疡大鼠胃黏膜的保护作用及其作用机制.方法采用无水乙醇灌胃法复制大鼠急性胃溃疡模型,测定胃黏膜细胞内丙二醛(MDA)、超氧化物歧化酶(SOD)的表达、谷胱苷肽过氧化物酶(GSH-Px)活力及钙离子浓度.结果模型组大鼠胃黏膜细胞内钙离子浓度较其他各组明显升高,与芩连合剂组和正常组比较有非常显著性差异(P＜0.01);SOD、GSH-Px的表达较其他各组明显降低,MDA表达较其他各组明显升高,与芩连合剂组、地尔硫组和正常组比较有显著性差异(P＜0.05,P＜0.01).结论QLHJ通过降低胃黏膜细胞内钙离子浓度的水平,降低胃黏膜细胞内MDA的表达和提高胃黏膜细胞内SOD和GSH-Px的表达,从而发挥其保护胃溃疡大鼠胃黏膜细胞的作用.     

Protective effects of astaxanthin from Paracoccus carotinifaciens on murine gastric ulcer models

The purpose of this study was to investigate the effect of astaxanthin extracted from Paracoccus carotinifaciens on gastric mucosal damage in murine gastric ulcer models. Mice were pretreated with astaxanthin for 1 h before ulcer induction. Gastric ulcers were induced in mice by oral administration of hydrochloride (HCl)/ethanol or acidified aspirin. The effect of astaxanthin on lipid peroxidation in murine stomach homogenates was also evaluated by measuring the level of thiobarbituric acid reactive substance (TBARS). The free radical scavenging activities of astaxanthin were also measured by electron spin resonance (ESR) measurements. Astaxanthin significantly decreased the extent of HCl/ethanol‐ and acidified aspirin‐induced gastric ulcers. Astaxanthin also decreased the level of TBARS. The ESR measurement showed that astaxanthin had radical scavenging activities against the 1,1‐diphenyl‐2‐picrylhydrazyl radical and the superoxide anion radical. These results suggest that astaxanthin has antioxidant properties and exerts a protective effect against ulcer formation in murine models. Copyright © 2011 John Wiley & Sons, Ltd.     

芦荟多糖对动物实验性胃溃疡的影响

目的研究芦荟多糖对动物实验性胃溃疡的影响。方法应用大鼠幽门结扎型胃溃疡模型、大鼠醋酸烧灼型胃溃疡模型、小鼠利血平致胃溃疡模型,观察芦荟多糖ig给药对实验性胃溃疡的预防与治疗作用及对大鼠胃液、胃酸、胃黏液、胃蛋白酶分泌及活性的影响。结果芦荟多糖对实验性胃溃疡具有明显的预防及治疗作用,并能抑制胃液分泌、胃酸分泌及减少胃蛋白酶、胃黏液的分泌,但对胃蛋白酶活性无明显影响。结论芦荟多糖对动物实验性胃溃疡具有良好的预防及治疗作用,并能抑制溃疡致病因子胃酸及胃蛋白酶的分泌。     

dl-四氢巴马汀抗大鼠胃溃疡作用

 目的研究dl-四氢巴马汀(dl-THP)对大鼠急、慢性溃疡的保护作用,并初步分析其机制。方法胃黏膜损伤由吲哚美辛、束缚应激、结扎幽门和胃浆膜下注入醋酸引起。dl-THP15,30,45mg·kg^-1灌胃,1日2次,共5次。测定大鼠胃溃疡数目、面积、胃酸分泌、胃蛋白酶活性以及胃黏膜血流。结果dl-THP15,30,45mg·kg^-1能抑制大鼠胃黏膜损伤,且呈剂量依赖性;dl-THP30mg·kg^-1对大鼠慢性胃溃疡的抑制率为75.8%,与雷尼替丁30mg·kg^-1的67.7%相仿。dl-THP可增加胃黏膜血流,但对胃酸和胃蛋白酶分泌无影响。结论dl-THP具有明显抗实验性胃溃疡作用,可能与其增加胃黏膜血流有关,亦可能部分通过阻滞胃黏膜DA受体而发挥作用。     

Antiulcerogenic effects of coconut (Cocos nucifera) extract in rats

A warm water crude extract of coconut milk and a coconut water dispersion were investigated for their antiulcerogenic effects in male Wistar albino rats. Ulcers were induced in the male rats by subcutaneous administration of indomethacin (40 mg/kg) using standard procedures. The ulcer inhibition rate (UIR) was taken as a measure of the cytoprotection offered by test substances. Coconut milk (2 mL daily oral feeding) produced a stronger percentage (54%) reduction in the mean ulcer area than coconut water (39%). The effect of coconut milk was similar to the effect of sucralfate that reduced the mean ulcer area by 56% in this study. Sucralfate is a conventional cytoprotective agent. The results showed that coconut milk and water via macroscopic observation had protective effects on the ulcerated gastric mucosa. It is concluded that coconut milk offered stronger protection on indomethacin-induced ulceration than coconut water in rats.     

乳香提取物对大鼠乙酸胃溃疡愈合质量的影响研究

目的探讨乳香提取物对大鼠乙酸胃溃疡愈合质量的影响及OCT技术应用于溃疡愈合质量研究的价值。方法用冰醋酸制备大鼠慢性胃溃疡模型,随机分为4组,分别灌服生理盐水、乳香提取物、奥美拉唑等。用病理及OCT技术对再生黏膜厚度进行动态观察。结果乳香提取物组再生黏膜厚度增加,OCT可以检测到溃疡病灶黏膜下层组织的愈合过程。结论乳香提取物能提高溃疡再生黏膜结构成熟度,提高溃疡愈合质量,OCT对愈合质量的研究具有一定的价值。     

乳香提取物对大鼠乙酸胃溃疡愈合质量的影响研究

目的探讨乳香提取物对大鼠乙酸胃溃疡愈合质量的影响及OCT技术应用于溃疡愈合质量研究的价值。方法用冰醋酸制备大鼠慢性胃溃疡模型,随机分为4组,分别灌服生理盐水、乳香提取物、奥美拉唑等。用病理及OCT技术对再生黏膜厚度进行动态观察。结果乳香提取物组再生黏膜厚度增加,OCT可以检测到溃疡病灶黏膜下层组织的愈合过程。结论乳香提取物能提高溃疡再生黏膜结构成熟度,提高溃疡愈合质量,OCT对愈合质量的研究具有一定的价值。     

胃疡宁丸抗实验性胃溃疡的药效及机制研究

目的:研究胃疡宁丸抗实验性胃溃疡的药效及其机制.方法:采用大鼠醋酸注射法、水浸应激性、阿司匹林诱发及幽门结扎性胃溃疡模型,观察胃疡宁丸抗胃溃疡的作用并考察其对血清NO,EGF含量,胃黏膜血流量,PGE2含量,及对胃液分泌、胃酸含量、胃蛋白酶活性的影响.结果:胃疡宁丸能够降低各种胃溃疡模型的溃疡指数,升高NO,EGF含量,PGE2含量及胃黏膜血流量,抑制胃液分泌和胃酸含量及降低胃蛋白酶活性.结论:胃疡宁丸具有明显的抗实验性胃溃疡的作用,该作用与其减少胃黏膜损伤因子(胃酸、胃蛋白酶),增加胃黏膜屏障的功能,增强胃黏膜修复作用(NO,EGF,PGE2,胃黏膜血流量)有关.     

普胃丸对胃溃疡复发大鼠胃组织EGF和EGFR表达的影响

目的:观察普胃丸(PWP)对胃溃疡(GU)复发过程中大鼠胃组织中表皮生长因子(EGF)及表皮生长因子受体(EG-FR)表达的影响。方法:将SD大鼠随机分为6组,即正常对照组、假手术组、模型未复发组、模型复发组、奥美拉唑组、PWP组。采用醋酸烧灼法建立大鼠慢性GU模型,并于造模第90 d,ip白细胞介素-1β(IL-1β),诱导大鼠GU复发。在溃疡复发后48 h测定各组大鼠GU复发率,HE染色法观察胃组织形态改变,并分别采用免疫组化法和Western blot法检测胃组织中EGF和EGFR的表达。结果:普胃丸组溃疡复发率为12.5%,明显低于模型复发组(P<0.01);HE染色显示普胃丸组复发溃疡处再生黏膜较模型复发组厚;普胃丸组EGF和EGFR的平均阳性密度分别为107.65±18.47、91.66±4.27,平均光密度值分别为149.98±16.11、85.18±3.94,其值明显高于除奥美拉唑组外其他各组(P<0.01)。结论:普胃丸可通过增加胃组织中EGF和EGFR的表达来降低溃疡复发率。     

胃液表皮生长因子在胃溃疡愈合中的作用

目的　探讨人胃溃疡愈合过程中表皮生长因子 (EGF)含量的变化及其作用。方法　采用放免的方法 ,对正常胃粘膜 (8例 )、胃溃疡活动期 (GA组 10例 )、愈合期 (GH组 10例 )、瘢痕期 (GS组 10例 )胃液的EGF含量的进行测定。结果　正常胃粘膜的胃液EGF的含量为 (5 0 2 .6± 5 1.3)pg/ml(n =8) ,GA组胃液EGF含量为 (15 6 .2± 4 6 .7)pg/ml(n =10 ) ,经统计学处理差异有显著性意义 (P <0 .0 5 ) ;而GH和GS组胃液的EGF含量分别为 (386 .1± 76 .8)pg/ml(n =10 )、(4 6 6 .3± 95 .4 )pg/ml(n =10 ) ,与GA组比较 ,差异有显著性意义(P <0 .0 5 )。结论　胃液EGF与溃疡的发生和愈合有关。     

七方胃痛胶囊对实验性胃溃疡大鼠表皮生长因子及其受体的影响唐梅文

目的：探讨中药七方胃痛胶囊抗溃疡的机制及提高溃疡愈合质量的应用价值。方法：40只Wistar大鼠制作乙酸诱发大鼠胃渍疡模型后第3天随机分为对照组、雷尼替丁胶囊、七方胃痛胶囊大、小剂量4组。取胃组织测量溃疡面积。观测再生粘膜纽织炎症细胞数、新生血管数，并测定表皮生长因子（EGF）及受体（EGFR）的表达情况。结果：1．七方胃痛胶囊纽溃疡指数明显低于雷尼替丁组和对照组（P〈0．05，P〈0．01）；2．七方胃痛胶囊组的再生粘膜的新生血管数明显高于雷尼替丁组和对照组（P〈0．05，P〈0．01），固有层炎症细胞浸润数明显低于雷尼替丁组和对照组（P〈0．05，P〈0．01）：3．七方胃痛胶囊组溃疡边缘粘膜组织的EGF与EGFR的表达明显高于雷尼替丁组和对照组（P〈0．05，P〈0．01）。结论：七方胃痛胶囊抗溃疡的作用机制与增加EGF与EGFR的表达有关，且能增加再生粘膜的新生血管生成，降低渍疡指数与炎症细胞浸润，对于提高溃疡愈合质量有一定的价值。     

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。     

白芨多糖对动物实验性胃溃疡的影响

目的观察白芨多糖对实验性小鼠和大鼠胃黏膜损伤的影响。方法采用水提醇沉的方法制备白芨多糖。采用冷水应激、乙醇诱导法制作小鼠胃溃疡模型,幽门结扎等方法制作大鼠胃溃疡模型。试验动物各分为5组:白芨多糖低剂量组、白芨多糖中剂量组、白芨多糖高剂量组、对照组和模型组,连续给药3 d,造模后处死动物并观察胃溃疡指数。结果白芨多糖对冷水应激小鼠胃黏膜损伤、乙醇诱导的小鼠胃黏膜损伤及结扎型大鼠胃黏膜损伤均具有保护作用。结论白芨多糖对实验性动物胃溃疡具有保护作用。