数字农科院2.0

白藜芦醇对乳房链球菌感染引起乳腺细胞氧化应激 的影响及机制

文献类型： 中文期刊

作者： 周艺琳;王正磊;许媛媛;韩先干;Vanhnaseng PHOUTHAPANE;苗晋锋

作者机构：

关键词： 小鼠乳腺上皮细胞;白藜芦醇;乳房链球菌;氧化应激;Nrf2

期刊名称：南京农业大学学报

ISSN： 1000-2030

年卷期： 2020 年 43 卷 4 期

页码： 698-704

收录情况： 北大核心（2020版） ; CSCD（2020-2021年度） ; 农林核心（2020版） ; 科技核心（2020版）

摘要： [目的]本试验旨在探讨白藜芦醇对乳房链球菌(Streptococcus uberis)感染引起乳腺细胞氧化应激的影响及机制.[方法]先用15μmol·L-1白藜芦醇(resveratrol)处理小鼠乳腺上皮细胞(EpH4-Ev)4 h,再加入乳房链球菌(MOI=10)共孵育3 h,收集样品;通过生化试剂盒(硝酸还原酶法、比色法、微量法等)、流式细胞术、显微镜观察、Western blot、RT-qPCR等方法检测相关指标的变化.[结果]乳房链球菌(S.uberis)感染可显著提高EpH4-Ev细胞活性氧(ROS)水平和一氧化氮(NO)、丙二醛(MDA)含量以及诱导型一氧化氮合酶(iNOS)、乳酸脱氢酶(LDH)、N-乙酰-β-D-氨基葡萄糖苷酶(NAGase)、超氧化物歧化酶(SOD)活性,降低总抗氧化能力(T-AOC)水平.白藜芦醇预处理后可显著降低ROS水平、NO含量以及iNOS、LDH、NAGase活性,显著提高T-AOC水平,进一步提高SOD活性.在分子水平上,S.uberis感染显著提高EpH4-Ev细胞血红素加氧酶1(HO-1)、NAD(P)H:醌氧化还原酶1(NQO1)、过氧化氢酶(CAT)、谷胱甘肽S-转移酶(GST)mRNA与核因子E2相关因子2(Nrf2)蛋白的表达水平,而白藜芦醇预处理对此有进一步提升作用.显微镜下观察发现白藜芦醇预处理可以明显改善由S.uberis感染引起的小鼠乳腺上皮细胞皱缩.[结论]白藜芦醇可以有效缓解乳房链球菌感染引起乳腺细胞的氧化应激,这可能与白藜芦醇激活Nrf2蛋白并促进其下游抗氧化基因表达相关.

分类号： S852.4

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