| | | 微波辐照对大鼠海马COXI、IV基因表达影响
| | 药学毕业论文【关键词】 微波;海马;细胞色素C氧化酶;能量代谢 摘要:目的药学毕业论文 研究微波辐照后大鼠海马组织细胞色素C氧化酶(COX)亚基I、IV mRNA表达变化和对酶活性的药学毕业论文影响,探讨微波辐照对大鼠海马能量代谢影响的机制。方法 采用RT-PCR法检测微波辐照后海马组织COXI、IV mRNA水平,采用还原细胞色素C法和高效液相色谱法(HPIC)分别检测微波辐照后海马组织细胞色素C氧化酶活性和三磷酸腺苷(ATP)、二磷酸腺苷(ADP)、一磷酸腺苷(AMP)含量。结果 微波辐照后,大鼠海马组织细胞色素C氧化酶活性和ATP含量明显降低,并与COXI、IV mRNA表达变化呈一致性。结论 微波辐照可影响大鼠海马COXI、IV mRNA表达而降低酶的活性,进而引起能量代谢障碍。 关键词: 微波;海马;细胞色素C氧化酶;能量代谢 Effect of microwave exposure on COXI and COXIV mRNA expression in hippocampus of rats Abstract: Objective To study mRNA expression of cytochrome c oxidase (COX) subunit Ⅰ,Ⅳ and activity of cytochrome c oxidase in hippocampus of rats after microwave exposure,and to interpret the molecular mechanism of microwave exposure on the energy metabolism deficit in hippocampus of rats.Methods The expression of cytochrome c oxidase subunit Ⅰ and Ⅳ mRNA after microwave exposure was detected by RT-PCR.The content of adenosine triphosphate(ATP),adenosine diphosphate(ADP),adenosine monophosphate(AMP) and activity of cytochrome c oxidase in hippocampus were detected by high performance liquid chromatography (HPLC) and reduced cytochrome c methods respectively.Results Decreased activity of cytochrome c oxidase and content of ATP in hippocampus were found after exposure,cytochrome c oxidase subunit Ⅰ and Ⅳ mRNA was also downregulated.Conclusion Microwave irradiation can decrease the expression of COXI,Ⅳ mRNA and avtivity of COX,and further to induce energy metabolism deficit in hippocampus of rats. Key words: microwave;hippocampus;cytochrome c oxidase;energy metabolism 现代生活与微波技术的应用密切相关,由此导致的环境污染问题已引起了广泛关注。本研究选择在细胞色素C氧化酶(COX)活性中起主要作用的催化亚基Ⅰ和调节亚基Ⅳ为观察指标,观察微波对COX活性和基因表达的影响,以期探讨微波辐照致大鼠海马能量代谢改变的分子机制。 1 材料与方法 11 材料 (1) 实验动物:健康雄性Wistar大鼠(第三军医大学动物室),体重180~220g。(2) 分组:随机分为对照组、微波辐照组。辐照组具体分为辐照后即刻,3,6,12h 4个观察组,对照组及辐照各组均为12只大鼠,共60只。(3) 仪器:PCR仪(美国MJ公司);凝胶成像系统(美国BIO-RAD公司);Du 640紫外分光光度计(德国Beckman公司);高效液相色谱仪(日本岛津公司)。(4) 试剂:COXI引物(上游:5′GCTGCTAATACTGGCAGTGAGA3′,下游:5′GCTTCGGAAACTGACTTGTACC3′,扩增片段约381 bp);COXIV引物(上游:5′GGCAGCAGTGGCAGAATGTTGG3′,下游:5′ACAAGCGCAGTGAAGCCGATGA3′,扩增片段约364bp);内参βactin(上游:5′TAAAGACCTCTATGCCAACACAGT3′,下游:5′CACGATGGAGGGGCCGGACTCATC3′,扩增片段约241bp),所有引物由上海Sangon公司合成。ATPNa2、ADPNa2、Cytc(美国Sigma公司)。
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