AIM To determine the impact of selected well defined Helicobacter pylori(H. pylori) antigens on gastric barrier cell turnover.METHODS In this study,using two cellular models of gastric epithelial cells and fibroblasts...AIM To determine the impact of selected well defined Helicobacter pylori(H. pylori) antigens on gastric barrier cell turnover.METHODS In this study,using two cellular models of gastric epithelial cells and fibroblasts,we have focused on exploring the effects of well defined H. pylori soluble components such as glycine acid extract antigenic complex(GE),subunit A of urease(Ure A),cytotoxin associated gene A protein(Cag A) and lipopolysaccharide(LPS) on cell turnover by comparing the wound healing capacity of the cells in terms of their proliferative and metabolic activity as well as cell cycle distribution. Toxic effects of H. pylori components have been assessed in an association with damage to cell nuclei and inhibition of signal transducer and activator of transcription 3(STAT3) phosphorylation. RESULTS We showed that H. pylori GE,Cag A and Ure A promoted regeneration of epithelial cells and fibroblasts,which is necessary for effective tissue healing. However,in vivo increased proliferative activity of these cells may constitute an increased risk of gastric neoplasia. In contrast,H. pylori LPS showed a dose-dependent influence on the process of wound healing. At a low concentration(1 ng/m L) H. pylori LPS accelerated of healing epithelial cells,which was linked to significantly enhanced cell proliferation and MTT reduction as well as lack of alterations in cell cycle and downregulation of epidermal growth factor(EGF) production as well as cell nuclei destruction. By comparison,H. pylori LPS at a high concentration(25 ng/m L) inhibited the process of wound repair,which was related to diminished proliferative activity of the cells,cell cycle arrest,destruction of cell nuclei and downregulation of the EGF/STAT3 signalling pathway.CONCLUSION In vivo H. pylori LPS driven effects might lead to the maintenance of chronic inflammatory response and pathological disorders on the level of the gastric mucosal barrier.展开更多
目的探讨采取腹腔镜胃癌根治术的方式对患者术后的免疫功能、肠道屏障功能及应激反应的影响。方法选取198例胃癌患者作为研究对象,按照采取手术治疗方式的不同分为观察组和对照组,每组各99例。对照组患者给予传统胃癌根治术治疗;观察组...目的探讨采取腹腔镜胃癌根治术的方式对患者术后的免疫功能、肠道屏障功能及应激反应的影响。方法选取198例胃癌患者作为研究对象,按照采取手术治疗方式的不同分为观察组和对照组,每组各99例。对照组患者给予传统胃癌根治术治疗;观察组患者给予腹腔镜胃癌根治术治疗。对比术后2组患者的免疫功能、肠道屏障功能以及应激反应。结果术后第3 d 2组患者的免疫球蛋白水平、D-乳酸及二胺氧化酶(DAO)水平均低于术前(P<0.05),其中观察组的免疫球蛋白水平高于对照组,而D-乳酸及DAO水平均低于对照组;术后第3 d 2组患者的应激因子水平均有上升(P<0.05),其中观察组低于对照组,差异具有统计学意义(P<0.05)。结论对胃癌患者采取腹腔镜胃癌根治术能够显著减轻对患者免疫功能、患者肠道屏障功能的影响,并且能够减少应激反应的发生率,有利于改善患者的预后。展开更多
基金Supported by National Science Centre of Poland,No.DEC-2013/09/N/NZ6/00805 and No.DEC-2015/17/N/NZ6/03490
文摘AIM To determine the impact of selected well defined Helicobacter pylori(H. pylori) antigens on gastric barrier cell turnover.METHODS In this study,using two cellular models of gastric epithelial cells and fibroblasts,we have focused on exploring the effects of well defined H. pylori soluble components such as glycine acid extract antigenic complex(GE),subunit A of urease(Ure A),cytotoxin associated gene A protein(Cag A) and lipopolysaccharide(LPS) on cell turnover by comparing the wound healing capacity of the cells in terms of their proliferative and metabolic activity as well as cell cycle distribution. Toxic effects of H. pylori components have been assessed in an association with damage to cell nuclei and inhibition of signal transducer and activator of transcription 3(STAT3) phosphorylation. RESULTS We showed that H. pylori GE,Cag A and Ure A promoted regeneration of epithelial cells and fibroblasts,which is necessary for effective tissue healing. However,in vivo increased proliferative activity of these cells may constitute an increased risk of gastric neoplasia. In contrast,H. pylori LPS showed a dose-dependent influence on the process of wound healing. At a low concentration(1 ng/m L) H. pylori LPS accelerated of healing epithelial cells,which was linked to significantly enhanced cell proliferation and MTT reduction as well as lack of alterations in cell cycle and downregulation of epidermal growth factor(EGF) production as well as cell nuclei destruction. By comparison,H. pylori LPS at a high concentration(25 ng/m L) inhibited the process of wound repair,which was related to diminished proliferative activity of the cells,cell cycle arrest,destruction of cell nuclei and downregulation of the EGF/STAT3 signalling pathway.CONCLUSION In vivo H. pylori LPS driven effects might lead to the maintenance of chronic inflammatory response and pathological disorders on the level of the gastric mucosal barrier.
文摘目的探讨采取腹腔镜胃癌根治术的方式对患者术后的免疫功能、肠道屏障功能及应激反应的影响。方法选取198例胃癌患者作为研究对象,按照采取手术治疗方式的不同分为观察组和对照组,每组各99例。对照组患者给予传统胃癌根治术治疗;观察组患者给予腹腔镜胃癌根治术治疗。对比术后2组患者的免疫功能、肠道屏障功能以及应激反应。结果术后第3 d 2组患者的免疫球蛋白水平、D-乳酸及二胺氧化酶(DAO)水平均低于术前(P<0.05),其中观察组的免疫球蛋白水平高于对照组,而D-乳酸及DAO水平均低于对照组;术后第3 d 2组患者的应激因子水平均有上升(P<0.05),其中观察组低于对照组,差异具有统计学意义(P<0.05)。结论对胃癌患者采取腹腔镜胃癌根治术能够显著减轻对患者免疫功能、患者肠道屏障功能的影响,并且能够减少应激反应的发生率,有利于改善患者的预后。