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Expression of PTX3 gene in Caco-2 cells treated with Lactobacillus acidophilus NCFM
Author(s): Xuena Lv1, Chaoxin Man2, Linlin Han1, Mingna Wang1, Guanghui Zhang1, YingLiu1, Shiqin Yang1, Yuqing Xue1, Yujun Jiang1, 2 1Key Lab of Dairy Science, Ministry of Education, College of Food Science and Engineering, Northeast AgriculturalUniversity, Harbin 150030, China 2 National Research Center of Dairy Engineering and Technology, Northeast Agricultural University, Harbin 150086, China
Pages: 554-
560
Year: 2011
Issue:
4
Journal: Acta Microbiologica Sinica
Keyword: 嗜酸乳杆菌NCFM; Caco-2细胞; PTX3基因; NF-κB途径;
Abstract: 【目的】研究嗜酸乳杆菌NCFM对肠道上皮细胞中免疫与炎症介质因子PTX3表达的影响,并进一步揭示其调节机制。【方法】嗜酸乳杆菌NCFM与Caco-2细胞共培养0、2、4、8和12 h,提取细胞RNA,采用RealTime RT-PCR方法检测PTX3基因的表达。嗜酸乳杆菌NCFM与Caco-2细胞共培养0、0.5、1、2和4 h,提取细胞蛋白质,采用Western blot方法检测NF-κB的磷酸化水平;用NF-κB的特异性抑制剂PDTC预处理Caco-2细胞30 min,然后加入嗜酸乳杆菌NCFM作用2 h,提取细胞RNA,采用Real Time RT-PCR方法检测PTX3基因的表达。【结果】嗜酸乳杆菌NCFM与Caco-2细胞共培养后能诱导PTX3的表达,并且在共培养4 h的时候PTX3的表达量达到最大,然后逐渐下降;嗜酸乳杆菌NCFM能快速的诱导NF-κB的磷酸化,并且在加入其特异性抑制剂PDTC后,PTX3的表达显著下降。【结论】嗜酸乳杆菌NCFM作用于肠道上皮细胞后能够通过迅速激活NF-κB途径暂时性的调控PTX3的表达。
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