干地黄煎剂对5种大鼠实验性胃溃疡的影响

目的:研究干地黄对5种实验性胃溃疡的影响。方法:采用幽门结扎型、O.2N mol/L NaOH 型、0.6mol/L HCl 型、消炎痛型和冷束缚应激型胃溃疡模型。结果:(1)十二指肠注射12g/kg 的干地黄煎剂,可抑制幽门结扎大鼠的胃酸分泌和胃溃疡形成;(2)胃饲6g/kg 的干地黄煎剂对0.2mol/L NaOH、0.6mol/L HCl 所致的胃粘膜损伤均有显著的抑制作用;(3)胃饲6g/kg 的干地黄还能抑制消炎痛型和冷束缚应激型胃溃疡的形成。结论:干地黄对大鼠的胃粘膜有明显的保护作用,其中对幽门结扎型胃溃疡的防治可能与其抑制胃酸分泌作用有关。     

一枝黄花对消炎痛所致大鼠胃溃疡的影响

目的：观察一枝黄花煎剂对消炎痛所致大鼠胃溃疡的影响。方法：给消炎痛前2h腹腔注射一枝黄花煎剂，6h后处死动物，观察胃粘膜损伤程度。结果：实验组的溃疡得分显著低于对照组。结论：一枝黄花煎剂对消炎痛所致大鼠胃粘膜损伤有明显的保护作用。     

栀子总苷对小鼠实验性胃粘膜损伤的保护作用

目的:研究栀子总苷(TGZ)对小鼠实验性胃粘膜损伤的保护作用及其与氧自由基(OFR)和一氧化氮(NO)的关系。方法:制备小鼠无水乙醇型、阿司匹林型、消炎痛型胃粘膜损伤模型,测定胃粘膜损伤面积;测定胃组织内丙二醛(MDA)和NO含量。结果:TGZ(5 0 ,10 0 ,2 0 0 mg/ kg,ig)可剂量依赖性地抑制小鼠实验性胃粘膜损伤。TGZ可使阿司匹林致小鼠胃粘膜损伤过程中胃组织中升高的MDA含量降低,可使降低的NO水平回升。结论:TGZ对小鼠实验性胃粘膜损伤具有保护作用,其作用机理与TGZ抗氧化和促进NO水平恢复正常有关。     

啤酒花提取物对大鼠胃粘膜保护的初步研究

目的研究啤酒花对胃黏膜损伤的辅助保护作用。方法 (1)采用急性酒精损伤模型,观察啤酒花提取物对大鼠急性胃粘膜损伤的影响;(2)采用冰醋酸注射法损伤模型,观察啤酒花提取物对大鼠慢性胃粘膜损伤的影响;(3)采用消炎痛损伤模型,观察啤酒花提取物对大鼠胃粘膜损伤的影响。结果受试物连续给药后,结果表明:(1)各用药组的胃粘膜损伤指数均较模型对照组明显减轻(P0.01);(2)呈现出一定的量效关系,受试物高剂量组较低剂量组的损伤指数明显降低,指数减少的百分率分别为60.38%、45.60%、52.73%。结论 (1)啤酒花提取物对大鼠无水乙醇引起的急性胃粘膜损伤、冰醋酸引起的慢性胃粘膜损伤、消炎痛致大鼠胃粘膜损伤,均有很好的抑制作用;(2)啤酒花对胃粘膜损伤有辅助保护作用。     

蒙药六味安消散对实验性胃损伤及肠推进作用

kg/kg、10g/kg六味安消散可明显抑制利血平、消炎痛、盐酸所致的胃粘膜捐伤.对结扎幽门所致的胃粘膜损伤及胃液酸度有明显保护和降低作用.剂量增加保护作用增强.六味安消散还可增加肠推进作用.     

胃乐优对胃粘膜损伤的保护作用

实验结果表明，胃乐优对大鼠因应激、幽门结扎、无水乙醇及消炎痛等所致胃粘膜损伤均有明显的保护作用。对醋酸性胃粘膜损伤有促进愈合作用。减少胃酸分泌和抑制胃蛋白酶活性可能与其合抑制胃粘膜损伤有关。此外，对醋酸所致小鼠扭体反应有明显的抑制作用。     

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。     

补中益气汤的药理作用研究——抗胃粘膜损伤作用与机理

补中益气汤水煎剂预先灌胃大鼠,能有效地预防无水乙醇、0.6N HC1、0.2N NaOH和消炎痛对大鼠胃粘膜的急性损伤作用。该方有提高正常大鼠以及消炎痛处理大鼠胃壁结合粘液含量和腺胃部组织PGE_2含量的作用。     

干地黄提取物对胃粘膜保护作用机制初探

本实验室曾报道干地黄能防止多种实验性胃溃疡形成和胃粘膜损伤,其对无水乙醇性胃牯膜损伤的预防机理与胃腔内的理化作用及前列腺素合成无关,但其活性成分及作用机制尚不清楚。本研究旨在初步分析干地黄活性成分存在的部位及其对溃疡形成和愈合的影响。材料和方法1 材料 1.1 动物采用 SD 纯种2级大白鼠,体重(160±20)g,雌雄不拘。由本校实验动物中心提供。1.2 干地黄提取物制备称取干地黄100g,加去离子水1500ml,煮沸1.5h 后过滤;残渣再加水至1500ml,煮沸1h 过滤,如此连续3次,将4次所得滤液混匀,浓缩至100ml,制成浓度为1.0g/ml 的水煎剂。再用80%的乙醇对煎剂进行提取,72h 后过滤,将醇溶部分水浴蒸发去除乙醇,再加少量双蒸水至体积为     

苦参碱对大鼠实验性胃粘膜损伤的保护作用

预先口服20、40mg／kg苦参碱能够显著抑制大鼠应激、盐酸、乙醇、消炎痛所致的胃粘膜损伤。40mg／kg苦参碱对不同方法所致胃粘膜损伤抑制率分别为32．7％、48．5％、26．1％、39．6％、31．5％。     

竹节人参对小鼠乙醇性胃黏膜损伤的保护作用

目的：研究竹节人参对乙醇致小鼠胃黏膜损伤的保护作用,并对其机制进行探讨。方法：ICR雄性小鼠随机分为正常组,模型组,竹节人参低、中、高剂量组(1.5,3.0,6.0 g·kg^-1)和饮多安组(1.5 g·kg^-1),观察预防给予竹节人参对模型小鼠血清、尿液中乙醇含量的影响,测定小鼠血清、胃组织中谷胱甘肽过氧化物酶(GSH-PX),过氧化氢酶(CAT),超氧化物歧化酶(SOD)的活性及丙二醛(MDA),还原型谷胱甘肽(GSH)的含量；同时通过电镜观察小鼠胃黏膜超微结构病理变化。结果：竹节人参(1.5,3.0 g·kg^-1)可显著降低模型小鼠血清中乙醇含量,加快小鼠体内乙醇通过尿液排出；降低模型小鼠血清、胃组织中MDA含量,提高GSH含量及GSH-PX,CAT,SOD酶活性；同时保护小鼠胃黏膜上皮细胞线粒体结构完整以维持其功能正常。结论：竹节人参对乙醇性胃黏膜损伤有明显保护作用,其作用机制之一可能是通过抑制乙醇的胃肠吸收,促进乙醇通过尿、粪等直接快速排出体外,同时加强乙醇在胃肠道的首过代谢,提高机体的抗氧化能力,通过对胃黏膜上皮细胞线粒体结构的保护,可能是其发挥解酒护胃作用的机制之一。     

基于均匀设计法评价白及制川乌配伍对胃溃疡模型小鼠的影响

目的 研究白及与制川乌不同配比和剂量变化对无水乙醇致胃溃疡模型小鼠胃黏膜损伤的影响.方法 采用均匀设计法,按2因素7水平,以小鼠胃溃疡指数和胃黏膜病理损伤积分为指标,观察白及制川乌合煎液灌胃给药后对胃溃疡小鼠的影响,并选取有显著意义的配比和剂量进行验证.结果 白及制川乌总剂量在3.64~29.32 g/kg范围内,小鼠溃疡指数和病理损伤积分随合煎液中白及剂量的增加而降低、随制川乌剂量的增加而升高,但二药未见交互作用;当总剂量固定不变,小鼠溃疡指数和病理损伤积分即随合煎液白及配比增加而降低、随制川乌配比增加而升高.结论 白及和制川乌合煎液对小鼠胃溃疡的影响与二药的剂量和配比密切相关,为十八反中白及与制川乌反药组合作用的深入研究提供实验依据.     

Anti-ulcer activity of ethanol extract of Terminaliapallida Brandis. in Swiss albino rats

Ethanol extract of Terminalia pallida Brandis. (EETP) was evaluated for its anti-ulcer activity against various models of ulcers, such as drug-induced ulcers, histamine-induced ulcers and ethanol-induced ulcers in Swiss albino rats. The EETP at the doses of 250 and 500 mg/kg per os (p.o.) exhibited significant protection against ulcers produced by indomethacin, histamine and the effect was comparable to that of the reference drug famotidine (30 mg/kg b.w) orally. The extract also afforded significant protection against ethanol-induced gastric ulceration. Meanwhile, EETP significantly lowered the elevated lipid peroxide level (thiobarbituric acid reactive substances (TBARS)) and restored the altered glutathione level in ethanol-induced gastric ulceration. The present investigation revealed that the EETP exhibited significant anti-ulcer activity by enhancing antioxidant potential of the gastric mucosa, thereby reducing mucosal damage.     

宁络护膜养胃合剂对大鼠无水乙醇所致急性胃黏膜损伤的保护作用

目的采用无水乙醇建立大鼠急性胃黏膜损伤动物模型，研究宁络护膜养胃合剂对大鼠急性胃黏膜损伤的保护作用。方法以SD大鼠为实验动物，随机分为阴性对照组、中药阳性对照组、西药阳性对照组及宁络护膜养胃合剂低、高剂量组；各给药组分别灌胃给予三九胃秦、奥美拉唑、宁络护膜养胃合剂，再用无水乙醇诱导大鼠急性胃黏膜损伤，观察各组胃黏膜损伤情况。结果宁络护膜养胃合剂高剂量（30g生药／kg）能降低大鼠无水乙醇胃黏膜损伤的损伤分数。结论宁络护膜养胃合剂对大鼠无水乙醇所致的急性胃黏膜损伤有保护作用。     

Anti-oxidative herbs and indomethacin-induced rat gastric mucosal lesions: protection by GamiHyangsa-Yukgunja

This study investigates the protective effects of GamiHyangsa-Yukgunja (GHY, a popular herbal medicine formula) on indomethacin-induced gastric mucosal lesions and morphological change in rats. Subcutaneous injection of indomethacin (25 mg/kg) produced the following gastric morphological alterations: mucosa hemorrhagic infarct, mucosa cell necrosis, leukocyte infiltration, mucosa hemorrhagic erosion, and gastric pit disappearance. Tissue damages were accompanied by increased oxidative stress, lipid peroxidation, and decreases in superoxide dismutase (SOD), and catalase (CAT) activities, and glutathione (GSH) concentrations. Our results show that pretreatment of the rats with orally administered GHY extract (3.3 ml/kg/day) significantly reduced gastric lesion formation and caused the amelioration of several pathological changes in the above-mentioned gastric mucosal lesions. Concomitantly, GHY-pretreatment increased gastric mucosal SOD and CAT activities and GSH concentrations. We therefore propose that GHY exerts a prophylactic effect on the indomethacin-induced gastric mucosal lesions by enhancing antioxidant defense systems.     

腹水草抗大鼠乙醇型胃溃疡的作用及机制研究

目的 研究腹水草水提液抗大鼠乙醇型胃溃疡的作用及机制。方法 48只健康SD大鼠随机分成正常组、模型组、雷尼替丁组,以及腹水草高、中、低剂量组,每组8只。正常组和模型组给予生理盐水灌胃;雷尼替丁组给予0.18%雷尼替丁混悬液［0.027 g/（kg·d)］灌胃;腹水草各剂量组分别给予高、中、低剂量腹水草水提液［2.8、1.4、0.7 g/（kg·d)］灌胃,每天1次,连续14天。于最后1次灌胃后,采用无水乙醇灌胃造模。比较各组大鼠胃溃疡指数及溃疡抑制率,检测血清及胃黏膜组织丙二醛(MDA)、NO含量和超氧化物歧化酶(SOD)活性,以及组织表皮生长因子(epidermal growth factor, EGF)含量。结果 腹水草各剂量组及雷尼替丁组溃疡指数较模型组明显减小(P<0.01),且腹水草各剂量组呈剂量依赖性(P<0.01);腹水草高剂量组的溃疡抑制率最高(P<0.01)。与正常组比较,模型组大鼠血清和组织MDA、NO含量显著升高,SOD活性以及组织EGF含量显著降低(P<0.01)。与模型组比较,腹水草各剂量组及雷尼替丁组血清和组织MDA含量降低,血清NO含量升高,组织NO下降,血清SOD活性升高,组织EGF含量提高,差异均有统计学意义(P<0.05,P<0.01)。结论 腹水草水提液具有抗大鼠乙醇型胃溃疡的作用。减少自由基生成、促进氧自由基清除及抗脂质过氧化反应,调控机体中NO和EGF含量,可能是其作用机制。     

Antiulcerogenic activity of Alchornea castaneaefolia: effects on somatostatin, gastrin and prostaglandin

The hydroethanolic extract of the leaves (HEL) and bark (HEB) obtained from Alchornea castaneaefolia (Euphorbiaceae) were investigated for their ability to prevent ulceration of the gastric mucosa in animal models. HEL (500 and 1000 mg/kg) and HEB (1000 mg/kg) significantly reduced the gastric injuries induced by the combination of HCl/ethanol and lowered the severity of gastric damage formation induced by indomethacin/bethanechol in mice. Further investigation showed that HEL also inhibited formation of ulcers in mice submitted to stress and pylorus ligature, but HEL did not modify gastric juice parameters in Shay mice. HEL was also effective in promoting the healing process in chronic gastric ulcer induced by acetic acid in rats. An enriched flavonoidic fraction (EFF at dose of 100mg/kg) obtained from HEL reduced gastric lesions induced by HCl/ethanol and indomethacin/bethanechol in mice. Although EFF did not modify the amount of free mucus production by gastric mucosa, it was able to increase prostaglandin production. When administered to rats submitted to ethanol-induced gastric lesions, EFF increased the somatostatin serum levels, while the gastrin serum levels were proportionally decreased. Phytochemical investigation on HEL and EFF led to the isolation of flavonoids glycosides as the main compounds, thus suggesting that these substances may be involved in the observed antiulcer activity.     

Cytoprotective effects of Cyperus rotundus against ethanol induced gastric ulceration in rats

The rhizome of Cyperus rotundus was assessed for its cytoprotective effects against ethanol induced gastric damage. Decoctions of Rhizoma Cyperi were given orally (1.25, 2.5, 4.0 g crude drug/kg) to rats 30 min before ethanol (40% v/v, 10 mL/kg) was administered. The decoction showed an ulcer inhibitory effect in a dose dependent manner. Moreover, the activity was also observed when the decoction was given subcutaneously (0.3–0.6 g/kg), suggesting that the herb possessed systemic effects on protecting the stomach. Compared with controls, gastric motility of the ethanol-treated rats was delayed significantly by either oral (2.5–4.0 g/kg) or subcutaneous (0.3 g/kg) administration of the decoction. Pretreatment of rats with indomethacin (5 mg/kg) significantly reduced the gastric protective action of C. rotundus. Mucus content in the stomach was not affected by administration of the docoction. The findings in this study suggest that the protective action of C. rotundus is related to its inhibition of gastric motility and endogeneous prostaglandins may play an important role. © 1997 John Wiley & Sons, Ltd.