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Prominent role of γ-glutamyl-transpeptidase on the growth of Helicobacter pylori

机译:γ-谷氨酰转肽酶在幽门螺杆菌生长中的重要作用

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摘要

AIM: γ-glutamyl transpeptidase (GGT) has been reported as a virulence and colonizing factor of Helicobacter pylori (H pylori). This study examined the effect of GGT on the growth of H pylori. METHODS: Standard H pylori strain NCTC 11637 and 4 clinical isolates with different levels of GGT activity as measured by an enzymatic assay were used in this study. Growth inhibition and stimulation studies were carried out by culturing H pylori in brain heart infusion broth supplemented with specific GGT inhibitor (L-serine sodium borate complex, SBC) or enhancer (glutathione together with glycyl-glycine), respectively. The growth profiles of H pylori were determined based on viable bacterial count at time interval. RESULTS: Growth was more profuse for H pylori isolates with higher GGT activity than those present with lower GGT activity. However, in the presence of SBC, growth of H pylori was retarded in a dose dependent manner (P = 0.034). In contrast, higher growth rate was observed when GGT activity was enhanced in the presence of glutathione and glycyl-glycine. CONCLUSION: Higher GGT activity provides an advantage to the growth of H pylori in vitro. Inhibition of GGT activity by SBC resulted in growth retardation. The study shows that GGT plays an important role on the growth of H pylori.
机译:目的:γ-谷氨酰转肽酶(GGT)被报道为幽门螺杆菌(H pylori)的毒力和定居因子。这项研究检查了GGT对幽门螺杆菌生长的影响。方法:本研究使用标准的幽门螺杆菌菌株NCTC 11637和4种具有不同水平的GGT活性的临床分离株(通过酶法测定)。生长抑制和刺激的研究是通过分别在补充了特定GGT抑制剂(L-丝氨酸硼酸钠复合物,SBC)或增强剂(谷胱甘肽和甘氨酰甘氨酸)的脑心浸液中培养幽门螺杆菌来进行的。根据时间间隔内的活细菌数确定幽门螺杆菌的生长情况。结果:与那些GGT活性较低的幽门螺杆菌相比,GGT活性较高的幽门螺杆菌的生长更为广泛。但是,在存在SBC的情况下,幽门螺杆菌的生长以剂量依赖的方式受到抑制(P = 0.034)。相反,当在谷胱甘肽和甘氨酰-甘氨酸存在下提高GGT活性时,观察到较高的生长速率。结论:较高的GGT活性为幽门螺杆菌的体外生长提供了优势。 SBC对GGT活性的抑制导致生长迟缓。研究表明,GGT对幽门螺杆菌的生长起着重要作用。

著录项

  • 来源
    《World Journal of Gastroenterology》 |2004年第20期|p.2994-2996|共3页
  • 作者

    Min Gong; Bow Ho;

  • 作者单位

    Department of Microbiology, Faculty of Medicine, National University of Singapore, Singapore 117597, Republic of Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 消化系及腹部疾病;
  • 关键词

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