›› 2015, Vol. 42 ›› Issue (8): 2194-2203.doi: 10.16431/j.cnki.1671-7236.2015.08.039

• 疾病防治 • 上一篇    下一篇

食淀粉乳杆菌代谢产物对TGEV感染IPEC-J2细胞屏障功能的影响

田宗民, 张萍, 赵毅博, 刘文娜, 王子敬, 张宏宇, 张睿, 魏萍   

  1. 东北农业大学, 哈尔滨 150030
  • 收稿日期:2015-01-12 出版日期:2015-08-20 发布日期:2015-08-27
  • 通讯作者: 魏萍 E-mail:weiiping@163.com
  • 作者简介:田宗民(1989-),男,内蒙古扎兰屯人,硕士,研究方向:益生菌抗猪肠道病毒,E-mail:tzm447906262@sohu.com
  • 基金资助:
    黑龙江省教育厅重点项目(12521z001);哈尔滨科技局项目(2014RFXGJ096)

Effects of Lactobacillus amylovorus Metabolites on the Barrier Function of IPEC-J2 Cells Infected by TGEV

TIAN Zong-min, ZHANG Ping, ZHAO Yi-bo, LIU Wen-na, WANG Zi-jing, ZHANG Hong-yu, ZHANG Rui, WEI Ping   

  1. Northeast Agricultural University, Harbin 150030, China
  • Received:2015-01-12 Online:2015-08-20 Published:2015-08-27

摘要: 本研究采用荧光定量PCR方法,检测了IPEC-J2细胞不同时间点紧密连接蛋白3(claudin 3,CLDN-3)、细胞角蛋白8(cytokeratin 8,KRT8)、黏蛋白1(mucin 1,MUC1)3种蛋白mRNA的表达量变化。本试验将猪传染性胃肠炎病毒(TGEV)感染IPEC-J2细胞,探索食淀粉乳杆菌代谢产物是否通过维持或改善CLDN-3、KRT8、MUC1蛋白mRNA表达来增强细胞的屏障功能,是否对IPEC-J2细胞感染TGEV后的屏障功能产生影响。试验结果发现,正常细胞对照组MUC1、CLDN-3及KRT8蛋白mRNA表达量随时间没有显著变化(P> 0.05),MRS培养基对照组与正常细胞对照组相比没有显著变化(P> 0.05),食淀粉乳杆菌代谢产物单独处理组对细胞MUC1、CLDN-3及KRT8蛋白mRNA表达量呈显著上调作用(P< 0.05);食淀粉乳杆菌代谢产物+TGEV试验组与病毒对照组相比,处理24、36和48 h,MUC1、CLDN-3及KRT8蛋白的表达显著升高(P< 0.05)。结果表明,食淀粉乳杆菌代谢产物不仅能提高MUC1、CLDN-3及KRT8在IPEC-J2细胞上的表达,还能负调节TGEV诱导的MUC1、CLDN-3及KRT8在IPEC-J2细胞上的表达,从而加强IPEC-J2细胞对TGEV感染的屏障功能。

关键词: 食淀粉乳杆菌; 猪传染性胃肠炎病毒; 猪小肠上皮细胞

Abstract: This study used Real-time PCR to detect the changes of expression quantity of claudin 3 (CLDN-3), cytokeratin 8 (KRT8) and mucin 1 (MUC1) three proteins mRNA in IPEC-J2 cells at three different time points.IPEC-J2 cells were infected by TGEV, we explored whether Lactobacillus amylovorus metabolites could enhance cell barrier function by maintaining or improving mRNA expression of CLDN-3, KRT8 and MUC1, whether had effects on the barrier function of IPEC-J2 infected by TGEV.The results showed that mRNA expressions of MUC1, CLDN-3 and KRT8 in the normal cell control group did not change significantly with time (P> 0.05); MRS medium culture group did not change significantly compared to the normal cell control group(P> 0.05); Gene expressions of MUC1, CLDN-3 and KRT8 proteins in Lactobacillus amylovorus metabolites alone treatment group showed significant time-dependent effect (P< 0.05).After being treated 24, 36 and 48 h, gene expressions of MUC1, CLDN-3 and KRT8 proteins in Lactobacillus amylovorus metabolites+TGEV experiment group was significantly higher than virus control group (P< 0.05).Lactobacillus amylovorus metabolites could improve MUC1, CLDN-3 and KRT8 expressions in IPEC-J2 cells, while being able to negatively regulate MUC1, CLDN-3 and KRT8 expressions that TGEV induced in IPEC-J2 cells, thereby inhencing the barrier function of IPEC-J2 cell against TGEV.

Key words: Lactobacillus amylovorus; TGEV; IPEC-J2

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