胃速愈抗溃疡作用的药效学研究

目的：进行胃速愈抗溃疡作用的药效学研究。方法：分高、低剂量给药,观察胃速愈对应激性溃疡、乙醇致胃粘膜损伤、醋酸烧灼型胃溃疡、胃液分泌、胃液酸度、胃蛋白酶活性的影响,并与对照组、甲氯咪胍治疗组相比较。结果：胃速愈具有明显地抑制大鼠水浸应激性溃疡形成的作用;对无水乙醇引起的胃粘膜损伤及醋酸烧灼型溃疡也有明显的保护作用,并且还能抑制胃液分泌,降低胃液酸度,降低胃蛋白酶活性。结论：胃速愈有明显的抗溃疡作用。     

吴茱萸汤抗大鼠幽门结扎型胃溃疡作用机理的实验研究

目的:观察吴茱萸汤对幽门结扎型胃溃疡大鼠胃液及胃组织中相关指标的影响,以探讨其作用机理。方法:采用幽门结扎法复制大鼠胃溃疡模型。收集胃液,测其胃液量、胃液总酸度、胃蛋白酶活性、一氧化氮(NO)含量;制备胃组织匀浆,测其超氧化物歧化酶(SOD)活性及丙二醛(MDA)含量。结果:吴茱萸汤对幽门结扎型胃溃疡大鼠胃液量、总酸度及胃蛋白酶活性有明显的抑制作用,能显著增加其胃液中NO含量;能使胃组织中SOD活性明显升高。结论:吴茱萸汤抗幽门结扎型胃溃疡的作用是通过抑制攻击因子与促进防御因子,即抑制胃液总酸度、胃蛋白酶活性,增加粘膜血流量,提高机体抗氧化能力实现的。     

蒙药如达溃疡散对幽门结扎大鼠胃溃疡作用的实验研究

目的：探讨蒙药如达溃疡散抗胃溃疡的机理。方法：采用幽门结扎法复制大鼠胃溃疡模型,观察本方对大鼠胃溃疡的发生和胃液、胃酸的影响。结果：与模型对照组相比,如达溃疡散能明显抑制溃疡的发生,降低溃疡指数,抑制胃液的分泌,降低胃液总酸度,升高胃液PH值。结论：如达溃疡散具有抗胃溃疡的作用,其作用机理可能与降低胃酸分泌有关。     

调胃消滞丸对湿阻证模型大鼠胃液分泌及胃肠运动功能的影响

目的观察调胃消滞丸对湿阻证模型大鼠胃液分泌及胃肠运动功能的影响。方法复制湿阻证大鼠模型,通过胃液分泌量、胃蛋白酶等指标来考察调胃消滞丸的主要药效作用。结果调胃消滞丸高、中剂量(700,350mg/kg)能明显减少湿阻证模型大鼠胃液分泌量、降低胃液pH值、增加胃液总酸度及明显提高胃蛋白酶的活力。调胃消滞丸各剂量(700,350,175mg/kg)均能明显促进湿阻证模型大鼠的肠推进及胃排空功能。结论调胃消滞丸对湿阻证模型大鼠的胃肠功能异常有改善作用。     

五磨饮子促进大鼠胃液分泌及保护胃黏膜等作用的实验研究

目的观察五磨饮子对大鼠胃液分泌、胃黏膜保护等作用。方法采用Shay方法造成大鼠胃溃疡模型,观察灌服五磨饮子、思密达、生理盐水后大鼠胃液分泌总量、胃内总酸度、胃蛋白酶活性、损伤指数、溃疡发生率等指标的变化。结果五磨饮子与思密达均可明显促进胃液分泌(P<0.01),五磨饮子可明显提高胃酸分泌、明显抑制胃蛋白酶活性(P<0.01),思密达不影响胃酸分泌、不影响胃蛋白酶活性(P>0.05),五磨饮子、思密达均可降低Shay大鼠的损伤发生率,均有保护胃黏膜作用,五磨饮子保护胃黏膜作用较思密达为优。结论五磨饮子具有促进大鼠胃液分泌,抑制胃蛋白酶活性,保护胃黏膜等作用。作用机理可能与兴奋迷走神经、增加胃黏膜血流量有关。     

复胃胶囊对大鼠实验性慢性胃炎的作用

用乙醇及去氧胆酸钠联合诱发大鼠实验性慢性胃炎模型，观察了复胃胶囊的治疗作用，结果复胃胶囊显减轻胃粘膜的炎症程度，明显增大粘膜腺体层与粘膜肌层厚度比值，改善胃粘膜萎缩病变，对胃窦粘膜淋巴细胞聚集与胃体腺体囊状扩张病变动物数亦有减少的趋势，能显提高胃液胃液游离酸度，抑制胃液胃蛋白酶活性，减少胃液游离粘液量，降低血清胃泌素含量，表明复胃胶囊对该模型具有明显的治疗作用。     

丹参饮抗大鼠幽门结扎型胃溃疡作用机理的实验研究

目的:观察丹参饮对幽门结扎型胃溃疡大鼠胃液及胃组织中相关指标的影响,以探讨其作用机理。方法:采用幽门结扎法复制大鼠胃溃疡模型。收集胃液,测其胃液量、总酸度、胃蛋白酶活性及一氧化氮(NO)含量;制备胃组织匀浆,测其超氧化物歧化酶(SOD)活性及丙二醛(MDA)含量。结果:丹参饮对幽门结扎型胃溃疡大鼠胃液量、总酸度及胃蛋白酶活性无明显影响,但能显著增加其胃液中NO含量;能使胃组织中SOD活性明显升高,并使胃组织中MDA含量降低。结论:丹参饮抗幽门结扎型胃溃疡的作用是通过增强防御因子即增加黏膜血流量,削弱攻击因子即提高机体抗氧化作用来实现的。     

溃疡宁胶囊的药理作用研究

溃疡宁胶囊对乙醇所致大鼠胃粘膜损伤有明显的保护作用，对幽门结扎型溃疡的发生有明显抑制作用，对醋酸所致大鼠胃溃疡的愈合有明显的促进作用，同时还能报制胃液分泌，降低胃液酸度。     

和中降逆方对返流性食管炎食管粘膜的保护作用

目的探讨和中降逆方保护食管粘膜的作用机理.方法采用贲门成型术 幽门结扎 胃空肠Roux-enY吻合术制作大鼠反流食管炎模型,观察和中降逆方对食管粘膜损伤指数的影响;采用幽门结扎法收集胃液,观察和中降逆方对胃液分泌量、胃液总酸度和胃蛋白酶活性的影响;采用炭末法观察和中降逆方对胃肠运动的影响;通过测定食管粘膜MDA的含量,观察和中降逆方对食管粘膜局部抗氧化能力的影响.结果和中降逆方可剂量依赖性的减轻胃液反流对食管粘膜的损伤;和中降逆方对大鼠胃液分泌量、胃液总酸度及胃蛋白酶活性无明显影响,但和中降逆方可明显增加小鼠胃排空和肠推进作用.模型组大鼠食管粘膜MDA含量明显增加,而和中降逆方3个剂量均可减少食管粘膜MDA的含量.结论和中降逆方对食管粘膜的保护作用可能与该方促进胃肠运动及抗氧化作用有关.     

愈溃宁颗粒抗胃溃疡的药效学及急性毒性试验研究

目的:探讨愈溃宁颗粒(海螵蛸、延胡索、炙黄芪、白芍、炙甘草等)(YKN)的抗胃溃疡的作用机制。方法:采用应激性刺激、幽门结扎性胃溃疡、醋酸致胃溃疡、乙醇致胃黏膜损伤大鼠模型观察YKN抗胃溃疡作用;对正常大鼠胃液分泌、胃液酸度、胃蛋白酶活性的影响及扭体法镇痛试验;小鼠一日最大耐受量。结果:与空白组相比,YKN可抵制溃疡的形成,降低大鼠胃溃疡指数,促进溃疡的愈合,抑制胃液分泌,降低胃液酸度,有降低胃蛋白酶活性,减少醋酸致痛小鼠的扭体次数的综合作用。一日最大耐受量相当于临床用量的288倍。结论:YKN具有明显抗溃疡的作用且无明显的毒副作用。     

Curcumin''s prevention of inflammation-driven early gastric cancer and its molecular mechanism

Worldwide, gastric cancer is the second leading cause of cancer deaths and the fifth most common malignant tumor. Gastric cancer is believed to be caused by a variety of factors, such as genetics, epigenetics, and environmental influences. Among the pathogenic factors, inflammation has been considered as one of the main risk factors for gastric cancer. There are currently limited ways to prevent gastric cancer. Although the combined application of aspirin and non-steroidal anti-inflammatory drugs can reduce the risk, it has great side effects and can easily cause gastric perforation or gastric bleeding. Therefore, an alternative plan is urgently needed. Curcumin is the yellow pigment in the rhizome of the plant turmeric. Current studies have found that curcumin has a protective effect on gastric mucosal damage caused by non-steroidal anti-inflammatory drugs, gastric mucosal damage in rats, and gastric mucosal damage caused by stress bleeding and Helicobacter pylori infection. Curcumin shows significant anti-inflammatory and anti-cancer activities by regulating DNA methylation, histone modification, nuclear factor erythrocyte 2 related factor 2 and other related signal pathways. In this article, the latest evidence of curcumin for epigenetic changes in gastric cancer and its potential contribution to gastric cancer were discussed.     

从“毒瘀交阻”理论辨治胃癌前病变的思路与方法

胃癌是全球高发的恶性肿瘤之一,及早识别和控制胃癌前病变(PLGC)向胃癌发展是防治胃癌的重要途径。课题组在此前的研究中,认为毒瘀交阻是发生PLGC的主要病机,采用具有解毒化瘀作用的金果胃康胶囊治疗本病,取得了良好的疗效,故本文从"毒瘀交阻"理论探讨辨治胃癌前病变的思路与方法。     

邱佳信治疗胃癌临床经验探析

介绍邱佳信教授诊治胃癌的经验。认为胃癌的病因主要为脾胃虚弱,兼有痰瘀;治疗以健脾益气为基础,兼以清热解毒、软坚散结、活血化瘀、补肾培本;并提出处方用药特点,创制了胃肠安有效经验方。     

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.     

中药防治胃癌血管新生机制的研究进展

抑制胃癌血管新生已成为胃癌防治的研究热点。中医药对胃癌血管新生的作用研究已取得很大进展,诸多文献阐述了中药通过多种调控因子来实现对胃癌肿瘤血管的抑制作用,文章就不同血管生成调控因子进行分类,对近几年来中药防治胃癌血管新生的实验研究作一综述。     

中医药治疗胃癌淋巴转移的研究进展

胃癌的发病率和死亡率在所有肿瘤中均较高,我国因为胃癌死亡的人数每年高达49. 8万人。由于早期胃癌的发病特征不明显,多数到医院治疗的患者均已是中晚期胃癌,给家庭和社会都带来了沉重的负担。中晚期胃癌的术后生存期显著低于早期胃癌,其中最重要的原因在于胃癌的淋巴转移。淋巴转移是胃癌的主要转移途径,进展期胃癌的淋巴转移率高达70%左右,早期胃癌也可有淋巴转移。胃癌的淋巴结转移率和癌灶的浸润深度呈正相关。目前的治疗手段除手术切除、淋巴化疗及分子靶向治疗外,中医药因其中毒性低、治疗效果好、价格低的优势也发挥了重要的作用。中医认为胃癌的发生多因饮食不洁、情志失调、素体亏虚而致痰凝、气阻、血瘀与胃发为本病,病机总属本虚标实,临床中医治疗多以化痰解毒、健脾益气、温中散寒为主。近年来,多项研究证明中医药治疗胃癌淋巴转移在临床中疗效显著、作用广泛,其可能通过抑制基质金属蛋白酶对基底膜和细胞外基质(ECM)的水解,激发肿瘤失巢凋亡,抑制淋巴管新生,调控与肿瘤相关基因的表达等途径来治疗胃癌淋巴转移。文章从近年来中医药在治疗胃癌淋巴转移中的理论研究、实验研究以及临床研究的进展进行综述,揭示中药作用的机制及其作用靶点,以期为中医药治疗胃癌淋巴转移的深入研究以及临床上的应用提供科学依据。     

Evaluation of the pharmacological activity of extracts from amomi semen on the gastrointestinal tracts

We have investigated the effects of methanolic and alcoholic extracts from Amomi Semen on gastric secretion, as well as gastrointestinal propulsion or the prokinetic activities. The methanolic extract from Amomi Semen dose dependently decreased the volume output, acid output, and pepsin output in rat's gastric juice with increasing pH value, while the alcoholic extract had no influence on basal gastric acid secretion. Furthermore, the alcoholic extract improved the L-dopa to induce a delay of gastrointestinal transit in mice, while the methanolic extract did not improve it. However, both extracts had no influence on gastrointestinal transit in intact mice. These results suggest that Amomi Semen has an inhibitory effect on gastric acid secretion and that it has effects as the gastrointestinal prokinetics rather than propulsion. The present study pharmacologically elucidates a belief that Amomi Semen has been used in Chinese medicine for the treatment of gastrointestinal dyspepsia, which includes hyperchlorhydria, stomachache, abdominal distention, anorexia, gastric atony, etc.     

姜树民治疗慢性萎缩性胃炎伴非典型增生经验

慢性萎缩性胃炎是指胃黏膜已发生了萎缩性改变的慢性胃炎。若进一步发展,可形成非典型增生,易发展成胃癌。导师姜树民教授对慢性萎缩性胃炎做了详尽、系统的研究,认为慢性萎缩性胃炎伴非典型增生多为血瘀证。结合其病因病机的发展,在中医辨证论治的基础上,遣方用药,临证加减,疗效显著。     

Gossypin inhibits gastric cancer growth by direct targeting of AURKA and RSK2

Gossypin is a flavone extracted from Hibiscus vitifolius, which has been reported to exhibit anti‐inflammatory, antioxidant, and anticancer activities. However, the anticancer properties of gossypin and its molecular mechanism of action against gastric cancer have not been fully investigated. In the present study, we report that gossypin is an Aurora kinase A (AURKA) and RSK2 inhibitor that suppresses gastric cancer growth. Gossypin attenuated anchorage‐dependent and anchorage‐independent gastric cancer cell growth as well as cell migration. Based on the results of in vitro screening and cell‐based assays, gossypin directly binds to and inhibits AURKA and RSK2 activities and their downstream signaling proteins. Gossypin decreased S phase and increased G2/M phase cell cycle arrest by reducing the expression of cyclin A2 and cyclin B1 and the phosphorylation of the CDC protein. Additionally, gossypin also induced intrinsic apoptosis by activating caspases and PARP and increasing the expression of cytochrome c. Our results demonstrate that gossypin is an AURKA and RSK2 inhibitor that could be useful for treating gastric cancer.     

肠上皮化生和胃癌发生关系的研究进展

肠上皮化生(IM)是指胃黏膜上皮细胞被肠型上皮细胞所代替,常伴发于慢性萎缩性胃炎,既往研究认为IM是一种胃癌前病变,IM、假幽门腺化生、表达解痉多肽的化生可以直接转化为胃癌细胞。然而在最近动物模型的研究中提供了胃癌细胞起源事件的新观念,与既往研究结果相矛盾。文章将从IM起源、IM与胃癌发生的关系、幽门螺旋杆菌(HP)和胃微生物群与胃癌发生的关系、胃癌细胞起源、IM模型、IM中医证型与胃癌发生的关系等角度展开论述,为IM与胃癌发生的关系作一深入探讨。