Study on the antiulcer effects of Veronicastrum axillare on gastric ulcer in rats induced by ethanol based on tumor necrosis factor-α(TNF-α)and endothelin-1(ET-1)

Objective:To assess whether Veronicastrum axillare(V.axillare)can ameliorate ethanol-induced gastric mucosal lesions in rats,reduce the production of pro-inflammatory cytokines,suppress apoptosis and improve local microcirculation disturbances.Methods:Totally 48 male Sprague-Dawley rats were randomly divided into six groups,eight rats in each group.Rats in the normal group and the model group were administered with 0.9%normal saline respectively.Rats in the positive group and ranitidine group were administered with 0.18%ranitidine suspension by intragastric administration respectively.Those in the high dose V.axillare group,the medium dose V.axillare group and the low dose V.axillare group were administrated with V.axillare at the daily dose of 2.8 g/kg,1.4 g/kg and 0.7 g/kg by intragastric administration.Gastric mucosal lesions were produced by intragastric administration of absolute ethanol.Water extract of V.axillare was successively injected for 14 d and last day was injected 1 h before ethanol administration.Gastric mucosal ulcer index and ulcer inhibitory rate were counted by improved Guth methods.The tissue sections were made for pathological histology analysis.Also,we measured the concentrations of tumor necrosis factor-α(TNF-α)and endothelin-1(ET-1)in gastric mucosal,as an index of the pro-inflammatory cytokines,apoptosis and local microcirculation.Besides,the mRNA contents of TNF-αand ET-1 were measured to verify effects on gene expression by real-time fluorescent quantitative PCR.Results:Water extract of V.axillare significantly ameliorated the gastric mucosal lesions induced by ethanol administration(P【0.01).Pro-inflammatory cytokines,TNF-a and ET-1 were increased after ethanol administration and significantly reduced by water extract of V.axillare.The expressions of TNF-αand ET-1 mRNA were also be inhibited by water extract of V.axillare.Conclusion:Current evidences show water extract of V.axillare is effective for defending against ethanol-induced gastric mucosal lesions,significantly inhibiting the production of proinflammatory cytokines and the expressions of TNF-αand ET-1 mRNA,which may be useful for inhibiting apoptosis and improving local microcirculation.

爬岩红化学成分研究

目的研究爬岩红[Veronicastrum axillare(Sieb.et Zucc.)Yamazaki]全草的化学成分。方法采用硅胶和SephadexLH-20等色谱技术进行分离纯化,同时根据理化性质及波谱分析对所分离的化学成分进行结构鉴定。结果从爬岩红全草的乙醇提取物中共分离得到23个化合物,分别是5-羟基-7,4'-二甲氧基黄酮(1)、金合欢素(2)、5,7,4'-三羟基-8-甲氧基黄酮(3)、5,7,3'-三羟基-4'-甲氧基黄酮(4)、木樨草素(5)、油酸(6)、丁香脂素(7)、glyceryl ferulate(8)、桂皮酸(9)、对羟基桂皮酸(10)、咖啡酸(11)、阿魏酸(12)、3,4-二甲氧基肉桂酸(13)、对羟基苯甲酸(14)、原儿茶酸(15)、香草酸(16)、异香草酸(17)、原儿茶醛(18)、对苯二酚(19)、1,2,4-苯三酚(20)、D-甘露醇(21)、蔗糖(22)、β-谷甾醇(23)。结论除化合物2、5、19、21、23以外,其余均为首次从该种植物中分离得到,除化合物2、5、6、12、13、19、21、23以外,其余均为首次从该属植物中分离得到。其中化合物8的碳谱数据为首次报道。