食品科学

• 生物工程 • 上一篇    下一篇

活性氧影响单核细胞增生李斯特菌对7721肝癌上皮细胞的侵袭

陈国薇,吴 嫚,张 超,刘武康,丁承超,吴淑燕,李 森*,刘 箐*   

  1. 上海理工大学医疗器械与食品学院,上海 200093
  • 出版日期:2015-11-15 发布日期:2015-12-03

Effect of Reactive Oxygen Species (ROS) on the Invasion of Listeria monocytogenes to 7721 Epithelial Cells

CHEN Guowei, WU Man, ZHANG Chao, LIU Wukang, DING Chengchao, WU Shuyan, LI Sen*, LIU Qing*   

  1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Online:2015-11-15 Published:2015-12-03

摘要:

用还原性烟酰胺腺嘌呤二核苷酸磷酸(nicotinamide-adenine dinucleotide phosphate,NADPH)氧化酶抑制剂二苯基氯化碘盐(diphenyleneiodonium chloride,DPI)处理单核细胞增生李斯特菌(Listeria monocytogenes)后,用2’,7’-二氯荧光素二乙酸酯荧光法测定L. monocytogenes中的活性氧(reactive oxygen species,ROS),结果显示细胞内源性ROS明显降低且有DPI浓度依赖性。进而用ROS产生能力降低的L. monocytogenes侵袭7721肝癌上皮细胞,结果显示:在1~10 μmol/L的DPI浓度范围内,随着L. monocytogenes内ROS水平的降低,L. monocytogenes侵袭7721上皮细胞的能力却随之增长。本研究提示:L. monocytogenes可能和高等动植物一样存在类似于负责产生ROS的NADPH氧化酶,由其介导产生的ROS可能调控L. monocytogenes侵袭细胞的能力。

关键词: 单核细胞增生李斯特菌, 活性氧, 侵袭, 上皮细胞

Abstract:

Diphenyleneiodonium chloride (DPI), which can inhibit the activity of NADPH oxidase and reduce endogenous
reactive oxygen species (ROS), was used to reduce the generation of ROS in Listeria monocytogenes, which was then
allowed to invade 7721 epithelial cells of human hepatocellular carcinoma. The results showed that the endogenous ROS
in L. monocytogenes was markedly decreased in the presence of DPI in a concentration-dependent way. Within the DPI
concentration range of 1–10 μmol/L, as the level of ROS in reduced, its ability to invade 7721 epithelial cells increased.
This illustrates that L. monocytogenes may have a NADPH oxidase similar to that of higher plants and animals, which is
responsible for the production of ROS and regulates the invasion ability possibly by mediating ROS production, suggesting
that NADPH oxidase may be an important signal molecule for L. monocytogenes to invade 7721 epithelial cells.

Key words: Listeria monocytogenes, reactive oxygen species (ROS), invasion, epithelial cells

中图分类号: