AIM: To determine the concentration of α-and β-defensins in gastric juice of patients with various gastroduodenal diseases. METHODS: Concentrations of human neutrophil peptides (HNPs) 1-3, the major forms of α-defe...AIM: To determine the concentration of α-and β-defensins in gastric juice of patients with various gastroduodenal diseases. METHODS: Concentrations of human neutrophil peptides (HNPs) 1-3, the major forms of α-defensins, and human β-defensin (HBD)-1and HBD-2were measured by radioimmunoassay in plasma and gastric juice of 84 subjects, consisting of 54 Helicobacter pylori-infected and 30 uninfected subjects. They included 33 patients with chronic gastritis (CG), 12 with gastric ulcer (GU), 11 with duodenal ulcer (DU), 11 with benign gastric polyp (BGP) and 16 with normal mucosa (N group) on upper endoscopy. Plasma pepsinogen Ⅰ and Ⅱ levels, biomarkers for gastric mucosal inflammation and atrophy, were also measured. RESULTS: Gastric juice HNPs 1-3 levels in patients with CG, GU and BGP were significantly higher than those in patients with DU and N. Gastric juice HBD-2 concentrations in patients with CG and GU were significantly higher than those in the N group, but were significantly lower in DU patients than in GU patients. Gastric juice HBD-1 levels and plasma levels of these peptides were similar in the patient groups. Concentrations of gastric juice HNPs 1-3 and HBD-2 of in H pylori-infected patients were significantly different from those in uninfected subjects. HNPs 1-3 concentrations in gastric juice correlated negatively with plasma pepsinogen I levels and Ⅰ/Ⅱ ratios. HBD-2 levels in gastric juice correlated positively and negatively with plasma pepsinogen Ⅱ concentrations and Ⅰ/Ⅱratios, respectively. CONCLUSION: HNPs 1-3 and HBD-2 levels in gastric juice are diverse among various gastrointestinal diseases, reflecting the inflammatory and atrophic events of the background gastric mucosa affected by H pylori.展开更多
目的探讨黄芪建中汤对脾胃虚寒证胃溃疡大鼠的影响。方法将SD大鼠随机分为正常组、模型组、埃索美拉唑组(4.17 mg/kg)及黄芪建中汤低、高剂量组(9.27、18.54 g/kg)。采用番泻叶(10 m L/kg)联合游泳力竭法建立脾胃虚寒证候模型,无水乙醇(...目的探讨黄芪建中汤对脾胃虚寒证胃溃疡大鼠的影响。方法将SD大鼠随机分为正常组、模型组、埃索美拉唑组(4.17 mg/kg)及黄芪建中汤低、高剂量组(9.27、18.54 g/kg)。采用番泻叶(10 m L/kg)联合游泳力竭法建立脾胃虚寒证候模型,无水乙醇(10 m L/kg)联合阿司匹林肠溶片(200 mg/kg)建立胃溃疡模型。观察并记录大鼠的整体状态、体质量、进食量、饮水量和肛温,肉眼及HE染色观察胃黏膜组织形态学损伤,测量胃液总酸度和胃蛋白酶活性,ELISA法检测大鼠血清IL-4、IL-10、NO和TNF-α水平,qRT-PCR和免疫组化法分别检测TLR-2、MyD88 mRNA及蛋白表达。结果与模型组比较,黄芪建中汤组大鼠体质量、进食量、饮水量和肛温均上升(P<0.05,P<0.01),溃疡指数下降(P<0.01),胃酸总酸度和胃蛋白酶活性均降低(P<0.01),血清TNF-α水平下降(P<0.05、P<0.01),IL-4、IL-10和NO水平上升(P<0.05、P<0.01),胃组织中TLR-2、MyD88 mRNA及蛋白表达下调(P<0.01)。结论黄芪建中汤对脾胃虚寒型胃溃疡大鼠有显著的疗效,其作用机制可能通过调节TLR-2/MyD88信号通路,影响炎性因子表达,下调黏膜攻击因子水平,从而加速胃黏膜溃疡修复。展开更多
基金This Work Was Supported by Chinese Academy of Sciences "100 Talented Scholar Program" and Chinese Academy of Sciences "Knowledge Innovation Program" Grants (No.KSCX2-SW-205 KSCW2-SW-218), and also Supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry. The authors also gratefully acknowledge the support of K.C. Wong Education Foundation, Hong Kong.
文摘AIM: To determine the concentration of α-and β-defensins in gastric juice of patients with various gastroduodenal diseases. METHODS: Concentrations of human neutrophil peptides (HNPs) 1-3, the major forms of α-defensins, and human β-defensin (HBD)-1and HBD-2were measured by radioimmunoassay in plasma and gastric juice of 84 subjects, consisting of 54 Helicobacter pylori-infected and 30 uninfected subjects. They included 33 patients with chronic gastritis (CG), 12 with gastric ulcer (GU), 11 with duodenal ulcer (DU), 11 with benign gastric polyp (BGP) and 16 with normal mucosa (N group) on upper endoscopy. Plasma pepsinogen Ⅰ and Ⅱ levels, biomarkers for gastric mucosal inflammation and atrophy, were also measured. RESULTS: Gastric juice HNPs 1-3 levels in patients with CG, GU and BGP were significantly higher than those in patients with DU and N. Gastric juice HBD-2 concentrations in patients with CG and GU were significantly higher than those in the N group, but were significantly lower in DU patients than in GU patients. Gastric juice HBD-1 levels and plasma levels of these peptides were similar in the patient groups. Concentrations of gastric juice HNPs 1-3 and HBD-2 of in H pylori-infected patients were significantly different from those in uninfected subjects. HNPs 1-3 concentrations in gastric juice correlated negatively with plasma pepsinogen I levels and Ⅰ/Ⅱ ratios. HBD-2 levels in gastric juice correlated positively and negatively with plasma pepsinogen Ⅱ concentrations and Ⅰ/Ⅱratios, respectively. CONCLUSION: HNPs 1-3 and HBD-2 levels in gastric juice are diverse among various gastrointestinal diseases, reflecting the inflammatory and atrophic events of the background gastric mucosa affected by H pylori.
文摘目的探讨黄芪建中汤对脾胃虚寒证胃溃疡大鼠的影响。方法将SD大鼠随机分为正常组、模型组、埃索美拉唑组(4.17 mg/kg)及黄芪建中汤低、高剂量组(9.27、18.54 g/kg)。采用番泻叶(10 m L/kg)联合游泳力竭法建立脾胃虚寒证候模型,无水乙醇(10 m L/kg)联合阿司匹林肠溶片(200 mg/kg)建立胃溃疡模型。观察并记录大鼠的整体状态、体质量、进食量、饮水量和肛温,肉眼及HE染色观察胃黏膜组织形态学损伤,测量胃液总酸度和胃蛋白酶活性,ELISA法检测大鼠血清IL-4、IL-10、NO和TNF-α水平,qRT-PCR和免疫组化法分别检测TLR-2、MyD88 mRNA及蛋白表达。结果与模型组比较,黄芪建中汤组大鼠体质量、进食量、饮水量和肛温均上升(P<0.05,P<0.01),溃疡指数下降(P<0.01),胃酸总酸度和胃蛋白酶活性均降低(P<0.01),血清TNF-α水平下降(P<0.05、P<0.01),IL-4、IL-10和NO水平上升(P<0.05、P<0.01),胃组织中TLR-2、MyD88 mRNA及蛋白表达下调(P<0.01)。结论黄芪建中汤对脾胃虚寒型胃溃疡大鼠有显著的疗效,其作用机制可能通过调节TLR-2/MyD88信号通路,影响炎性因子表达,下调黏膜攻击因子水平,从而加速胃黏膜溃疡修复。