食品科学

• 营养卫生 • 上一篇    下一篇

嗜酸乳杆菌胞壁肽聚糖对小鼠肠黏膜的免疫调控

吴 振1,潘道东1,2,*,郭宇星1,曾小群2,孙杨赢2   

  1. 1.南京师范大学食品科学与营养系,江苏 南京 210097;2. 宁波大学海洋学院,浙江 宁波 315211
  • 出版日期:2015-07-15 发布日期:2015-07-08

Immunoregulatory Activity of Lactobacillus acidophilus Peptidoglycan in Mouse Intestinal Mucosa

WU Zhen1, PAN Daodong1,2,*, GUO Yuxing1, ZENG Xiaoqun2, SUN Yangying2   

  1. 1. Department of Food Science and Nutrition, Nanjing Normal University, Nanjing 210097, China;
    2. School of Marine Science, Ningbo University, Ningbo 315211, China
  • Online:2015-07-15 Published:2015-07-08

摘要:

通过建立以致病性大肠杆菌感染小鼠为模型,研究氧化修饰前后嗜酸乳杆菌肽聚糖(peptidoglycan,PG)对小鼠肠道上皮细胞病理形态影响,及对感染大肠杆菌肠黏膜分泌sIgA、血清干扰素-γ(interferon-γ,IFN-γ)和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)的影响,发现灌胃PG后能够促进小肠黏膜分泌sIgA,降低IFN-γ及TNF-α的表达,且选择性氧化修饰PG比未修饰PG具有优势。可见,嗜酸乳杆菌在肠道免疫方面,可以通过其功能性PG提高对小肠黏膜的免疫调控作用。

关键词: 嗜酸乳杆菌, 肽聚糖, 肠黏膜, 免疫调控

Abstract:

As an important immune system, mucosal immune system is the first line to protect the mucous membranes
against colonization and invasion by potentially dangerous microbes that may be encountered. In this study, the
immunoregulatory activity of Lactobacillus acidophilus peptidoglycan (PG) was investigated on pathogenic Escherichia coli
(E. coli)-induced mouse model. Compared with PG, the oxidative modification of PG had a significant effect on the secretion
of sIgA, reduced the expression of interferon-γ (IFN-γ) and tumor necrosis factor-α (TNF-α) in the intestinal mucosa. PG
derived from Lactobacillus acidophilus had the capability of enhancing immune regulation of intestinal mucosa.

Key words: Lactobacillus acidophilus, peptidoglycan, intestinal mucosa, immunoregulatory activity

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