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.     

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.     

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.     

Effect of some indigenous drugs on cold immobilization stress induced gastric ulcer

The effect of an alcoholic extract of P. cerasoides Bedd., A. muricata Linn., M. heyneana Thw. and P. nyctaginifolia Juss. on cold immobilization stress induced gastric ulceration was investigated in albino rats. All these indigenous drugs effectively protected stress induced gastric ulceration. However, of these drugs, the extract of P. cerasoides exhibited maximum gastric ulcer protective activity. © 1998 John Wiley & Sons, Ltd.     

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.     

腹部推拿对大鼠乙醇性胃黏膜损伤的修复作用及机制研究

[目的]研究腹部推拿对大鼠乙醇性胃黏膜损伤的修复作用及作用机制.[方法]采用无水乙醇灌胃法复制胃黏膜损伤大鼠模型,将造模大鼠随机分为腹部推拿组和模型组,另设空白对照组.腹部推拿组每天予推拿干预,模型组和空白对照组不予任何干预手段,干预21 d后,观察大鼠行为学改变;取胃组织,观察大鼠胃黏膜组织损伤情况及病理改变;酶联免...     

吴茱萸碱磷脂复合物自微乳给药系统的胃溃疡靶向效应及保护作用评价

目的 对吴茱萸碱磷脂复合物自微乳给药系统（evodiamine phospholipid complex self-emulsifying drug delivery system,Evo-PC-SMEDDS）的胃溃疡靶向效应进行评价，并验证其药效。方法通过分析荧光成像结果与激光共聚焦显微镜荧光成像结果，对该制剂的胃溃疡靶向性做出评价；通过胃组织形态学观察、HE染色结果，评价Evo-PC-SMEDDS对乙醇诱导的大鼠胃溃疡模型的改善作用，并计算胃溃疡指数、胃溃疡抑制率对胃溃疡情况进行量化和评分；通过测定胃分泌物与氧化应激相关因子，推测Evo-PC-SMEDDS可能的作用机制。结果 动物荧光成像结果显示，Evo-PC-SMEDDS在大鼠体内存在胃滞留。通过激光共聚焦显微镜观察到，荧光探针FITC标记的Evo-PC-SMEDDS集中分布于模型大鼠的溃疡黏膜表面。药效学结果与HE染色分析结果均显示，Evo-PC-SMEDDS对乙醇诱导的大鼠胃溃疡模型有较好的保护作用，且测得给药组大鼠胃组织中的MPO和NO含量显著降低（P<0.01）。且与吴茱萸碱组相比，其胃组织中GSH水平显著提高（P...     

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。     

Preventive effect of Shigyaku-san on progression of acute gastric mucosal lesions induced by compound 48/80, a mast cell degranulator, in rats

The study examined whether Shigyaku-san (Si-Ni-San) extract (TJ-35), a traditional Kampo medicine, prevents acute gastric mucosal lesion progression in rats treated once with compound 48/80 (C48/80). Rats treated with C48/80 (0.75 mg/kg body weight, i.p.) received TJ-35 (0.15, 0.35 or 0.75 g/kg body weight, p.o.) 0.5 h after the treatment at which time gastric mucosal lesions appeared. At 0.5 h after C48/80 treatment, the gastric mucosa of the treated rats had increased myeloperoxidase (an index of neutrophil infiltration) and xanthine oxidase activities and thiobarbituric acid reactive substances (an index of lipid peroxidation) content. At 3 h after C48/80 treatment, the gastric mucosa of the treated rats showed progressive lesions and further increases in myeloperoxidase and xanthine oxidase activities and thiobarbituric acid reactive substances content and decreases in vitamin E, ascorbic acid and adherent mucus contents and Se-glutathione peroxidase activity. Post-administered TJ-35 attenuated all these changes found at 3 h after C48/80 treatment dose-dependently. These results indicate that TJ-35 prevents the progression of C48/80-induced acute gastric mucosal lesions in rats possibly by attenuating enhanced neutrophil infiltration, enhanced lipid peroxidation associated with decreased vitamin E and ascorbic acid contents and Se-glutathione peroxidase activity, and destruction of the defensive barrier in the gastric mucosa.     

胃黏膜损伤大鼠胃组织P2X_1、P2X_3和P2X_5的表达及电针对其影响

目的观察电针足三里穴对胃黏膜应激损伤大鼠胃组织中P2X1、P2X3、P2X5mRNA表达的影响,探讨电针足三里穴防治胃黏膜损伤的分子机制。方法将SD大鼠随机分为正常对照组(正常组)、胃黏膜应激损伤模型组(模型组)和电针足三里穴组(电针组)。采用冷-束缚法制作胃黏膜应激损伤大鼠模型。造模后次日起电针组每天电针足三里穴20分钟,连续三天。RT-PCR法检测胃组织P2X1、P2X3、P2X5mRNA表达。结果各组大鼠均表达P2X1、P2X3、P2X5mRNA;模型组与正常组比较,P2X1mRNA表达显著降低(P0.01);电针组与模型组比较,P2X1mRNA表达显著升高(P0.05);P2X3、P2X5mRNA组间未见显著差异;正常组大鼠胃组织P2X3和P2X5呈显著正相关(P0.05)。结论胃黏膜应激损伤大鼠的胃组织P2X1mRNA表达下降,电针足三里穴可以上调胃黏膜应激损伤大鼠胃组织P2X1mRNA的表达。     

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。     

云母对实验性胃溃疡愈合质量的影响

目的:探讨云母对实验性胃溃疡愈合质量的影响。方法:建立实验性醋酸致大鼠胃溃疡模型,成模后分组给药治疗14 d,取其标本,评估再生黏膜组织学及功能成熟度,以判定溃疡愈合质量。结果:经云母治疗后,大鼠再生黏膜厚度增加、囊状扩张腺体数目减少,肉芽组织炎症细胞浸润数量减少、微血管数量增加、胶原面积增加,黏膜中性黏液和氨基己糖分泌增多,血浆PGE₂,EGF分泌增多,免疫组化染色中黏膜局部EGFR,bFGF阳性细胞表达增强。结论:云母能提高再生黏膜组织学及功能成熟度,最终达到高质量的溃疡愈合。     

手术与药物联合治疗难治性胃溃疡的疗效观察

目的：观察采用不同的手术方法与抗幽门螺杆菌药物治疗难治性胃溃疡的疗效。方法：选择我科2008年5月～2010年12月应用手术联合抗幽门螺杆菌药物治疗的难治性胃溃疡患者45例为观察组,同期行药物保守治疗的45例患者为对照组,观察组接受手术联合抗幽门螺杆菌抗生素治疗,对照组只采用药物治疗。结果：两组疗效、幽门螺杆菌根除率、生活质量评分比较,差异有统计学意义（P〈0．05）,两组患者出血、穿孔、感染、狭窄等并发症发生率比较,除感染外,差异均有统计学意义（P〈0．05）,观察组的疗效优于对照组。结论：手术联合抗幽门螺杆菌治疗难治性胃溃疡效果好,能显著提高溃疡治愈率和幽门螺杆菌根除率,降低复发率和并发症发生率,从根本上提高患者的生活质量。     

The protective effect and action mechanism of Vaccinium myrtillus L. on gastric ulcer in mice

Vaccinium myrtillus L. anthocyanoside (VMA) is used as a folk medicine to treat diseases related to gastric ulcers in northern Europe. However, the effects of VMA and its detailed mechanism on gastric ulcer have not been investigated sufficiently. Therefore, the aim of the present study was to investigate the protective effects of VMA on gastric mucosal damage in a murine gastric ulcer model. First the effects of VMA on ethanol‐induced gastric ulcers in mice were investigated. Then, the levels of lipid peroxide in murine stomach homogenates were measured to investigate the antioxidative effects of VMA. In addition, the free radical scavenging activity of VMA and its main anthocyanidins were evaluated by electron spin resonance measurement. Oral administration of VMA (10, 30 and 100 mg/kg) significantly protected gastric mucosa against HCl/ethanol‐induced gastric ulcers. Furthermore, VMA inhibited lipid peroxide levels in a concentration‐dependent manner and showed high scavenging activity against the superoxide anion radical (·O₂^‐) and the hydroxyl radical (·OH). Anthocyanidins also showed scavenging activity against the ·O₂^‐, while only delphinidin showed high scavenging activity against the ·OH. These findings indicate that the protective effects of VMA on HCl/ethanol‐induced gastric mucosal injury may be partially due to the antiperoxidative effects of anthocyanidins. Copyright © 2011 John Wiley & Sons, Ltd.     

活血化瘀方对大鼠急性胃粘膜损伤的保护作用及机理研究

本实验观察了活血化瘀药物（丹参、赤芍、川芎、莪术组成）水提液对盐酸乙醇致急性胃粘膜损伤的保护作用，结果显示活血化瘀方5．4g/kg、10．8g/kg、21．6g/kg对损伤模型具有很好的保护作用，并呈明显的量效关系；预先灌胃10．8g/kg能显著抑制盐酸乙醇引起的大鼠血浆过氧化脂质含量升高，对红细胞超氧化物歧化酶活性降低有抑制趋势。     

胃舒宁胶囊对老年胃溃疡患者胃酸以及胃蛋白的影响

目的:观察胃舒宁胶囊对老年胃溃疡患者胃酸及胃蛋白的影响。方法:选择我科治疗的老年胃溃疡患者200例,随机分为对照组和治疗组各100例,对照组行常规抑酸护胃根治幽门螺杆菌治疗,治疗组在此基础上加用胃舒宁胶囊治疗,比较两组患者治疗前后胃液pH值水平及血清胃蛋白酶I(PGI)、胃蛋白酶II(PGII)变化。结果:治疗后两组患者胃液pH值水平较治疗前上升明显,差异具有统计学意义(P0.05),治疗组胃液pH值水平较对照组显著升高,差异具有统计学意义(P0.05);治疗后两组血清PGI、PGII及PGI/PGII均低于治疗前(P0.05),治疗组患者血清PGI、PGII及PGI/PGII比对照组降低更为明显(P0.05),具有统计学意义。结论:胃舒宁胶囊可抑制老年胃溃疡患者胃液pH值水平和胃蛋白酶活性,对老年胃溃疡有保护作用。     

Antiulcerogenic activity of Teucrium divaricatum Heldr. ssp. divaricatum

The methanol extract and lyophilized decoction of Teucrium divaricatum Heldr ssp. divaricatum protected gastric mucosa against lesions induced by ethanol in rats. The preventive antiulcer effect of preparations was reversed by pretreatment with indomethacin. Nevertheless, in the Shay-ligated method no decrease in either total volume, acidity or peptic activity of gastric juice was observed. © 1997 John Wiley & Sons, Ltd.     

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.     

禁食与进食对胃溃疡并出血患者胃内PH值的影响

目的:探讨禁食与进食对胃溃疡伴出血患者胃内PH值的影响.方法:将64例胃溃疡并出血(非大血)患者分为实验组(30例)和对照组(34例),实验组患者给予进食冷流质食物(常温),对照组患者给予常规禁食直至出血停止,分别观察两组在留置胃管后每天胃液PH值的变化情况,采用抽取胃液(8Am、12N、5Pm、9Pm)作测定(试纸测定)并记录.     

小檗碱对人胃癌细胞株BGC-823诱导凋亡的研究

目的:研究小檗碱对人胃癌BGC-823细胞诱导凋亡的作用.方法:应用荧光显微镜、透射电镜、流式细胞仪和TUNEL染色研究小檗碱对人胃癌BGC-823细胞诱导凋亡的作用.结果:小檗碱作用人胃癌BGC-823细胞后,可看到较为典型的细胞凋亡的形态学变化,细胞核固缩、染色质凝集成新月状紧贴于核膜周边,核碎裂、染色质片断化、凋亡小体形成等.流式细胞仪上出现典型的亚二倍体凋亡峰.TUNEL染色显示,随小檗碱浓度增加和作用时间延长,细胞凋亡率增加.结论:小檗碱对人胃癌BGC-823细胞有诱导凋亡作用.