本文主要研究内容
作者顾奕(2019)在《典型氯代磷系阻燃剂与蛋白互作机制及细胞毒性研究》一文中研究指出:氯代磷系阻燃剂(Chlorinated phosphorus flame retardants)在全球范围内的广泛分布使其成为一种新型全球性污染物,引起了社会上的广泛专注,有关它的生态毒性研究已成为当前的热点问题。本研究选取磷酸三(1,3-二氯异丙基)酯(Tris(1,3-dichloroisopropyl)phosphate,TDCPP,C9H15Cl6O4P)、磷酸三(2-氯丙基)酯(Tris(2-chloropropyl)phosphate,TCPP,C9H18Cl3O4P)、磷酸三(2-氯乙基)酯(Tris(2-chloroethyl)phosphate,TCEP,C6H12Cl3O4P)作为典型氯代磷系阻燃剂,将化学和细胞生物学有关方法与技术相结合,分子水平研究了这三种阻燃剂与人血清白蛋白(Human serum albumin,HSA)的相互作用机制并在细胞层次研究了对肝癌细胞(SMMC-7721)的氧化损伤毒性效应。主要工作和结论如下:1.利用毛细管电泳(Capillary electrophoresis,CE)技术建立典型氯代磷系阻燃剂与人血清白蛋白结合反应的分析方法。生理条件下,构建配体(氯代磷系阻燃剂)-受体(HSA)相互作用模型,研究不同浓度TDCPP,TCPP和TCEP与HSA的结合反应机制并比较不同阻燃剂作用机理的异同。结果表明,这三种阻燃剂与HSA发生结合反应形成TDCPP-HSA、TCPP-HSA和TCEP-HSA复合物。依据有效淌度变化,通过非线性拟合方程得到TDCPP-HSA、TCPP-HSA和TCEP-HSA的结合常数KB,分别为6.3111×104,1.2598×103和2.5706×103L·mol-1。相关数据表明TDCPP与HSA的相互作用是慢平衡结合反应,而TCPP和TCEP与HSA的相互作用是快平衡结合反应。相关结果阐明了血清白蛋白输运TDCPP,TCPP和TCEP的生理作用,为深入研究氯代磷系阻燃剂与生物大分子的结合反应提供理论参考。2.分析TDCPP,TCPP和TCEP作用于SMMC-7721细胞后的氧化损伤情况。采用CCK-8方法考察这三种阻燃剂对细胞增殖的影响,确定细胞增殖抑制效应的时间-量效关系,并分析细胞毒理损伤机制。结果表明TDCPP,TCPP和TCEP均能显著降低细胞存活率(P<0.05),具有明显的细胞毒性,染毒1272 h时段内具有时间量效关系。乳酸脱氢酶(Lactate dehydrogenase,LDH)、超氧化物歧化酶(Superoxide Dismutase,SOD)、过氧化氢酶(Catalase,CAT)表达的检测结果表明,这三种阻燃剂可使胞内LDH外漏,而胞内SOD、CAT含量随染毒浓度的增高而降低。荧光定量PCR结果显示,这三种阻燃剂可下调SOD-1、CAT基因的表达。研究发现TDCPP、TCPP和TCEP可对SMMC-7721细胞产生氧化损伤毒性效应,推断氧化损伤是生物毒性效应的重要机制之一。有关研究结果对评判氯代磷系阻燃剂的生态毒性效应具有重要意义。
Abstract
lv dai lin ji zu ran ji (Chlorinated phosphorus flame retardants)zai quan qiu fan wei nei de an fan fen bu shi ji cheng wei yi chong xin xing quan qiu xing wu ran wu ,yin qi le she hui shang de an fan zhuan zhu ,you guan ta de sheng tai du xing yan jiu yi cheng wei dang qian de re dian wen ti 。ben yan jiu shua qu lin suan san (1,3-er lv yi bing ji )zhi (Tris(1,3-dichloroisopropyl)phosphate,TDCPP,C9H15Cl6O4P)、lin suan san (2-lv bing ji )zhi (Tris(2-chloropropyl)phosphate,TCPP,C9H18Cl3O4P)、lin suan san (2-lv yi ji )zhi (Tris(2-chloroethyl)phosphate,TCEP,C6H12Cl3O4P)zuo wei dian xing lv dai lin ji zu ran ji ,jiang hua xue he xi bao sheng wu xue you guan fang fa yu ji shu xiang jie ge ,fen zi shui ping yan jiu le zhe san chong zu ran ji yu ren xie qing bai dan bai (Human serum albumin,HSA)de xiang hu zuo yong ji zhi bing zai xi bao ceng ci yan jiu le dui gan ai xi bao (SMMC-7721)de yang hua sun shang du xing xiao ying 。zhu yao gong zuo he jie lun ru xia :1.li yong mao xi guan dian yong (Capillary electrophoresis,CE)ji shu jian li dian xing lv dai lin ji zu ran ji yu ren xie qing bai dan bai jie ge fan ying de fen xi fang fa 。sheng li tiao jian xia ,gou jian pei ti (lv dai lin ji zu ran ji )-shou ti (HSA)xiang hu zuo yong mo xing ,yan jiu bu tong nong du TDCPP,TCPPhe TCEPyu HSAde jie ge fan ying ji zhi bing bi jiao bu tong zu ran ji zuo yong ji li de yi tong 。jie guo biao ming ,zhe san chong zu ran ji yu HSAfa sheng jie ge fan ying xing cheng TDCPP-HSA、TCPP-HSAhe TCEP-HSAfu ge wu 。yi ju you xiao tang du bian hua ,tong guo fei xian xing ni ge fang cheng de dao TDCPP-HSA、TCPP-HSAhe TCEP-HSAde jie ge chang shu KB,fen bie wei 6.3111×104,1.2598×103he 2.5706×103L·mol-1。xiang guan shu ju biao ming TDCPPyu HSAde xiang hu zuo yong shi man ping heng jie ge fan ying ,er TCPPhe TCEPyu HSAde xiang hu zuo yong shi kuai ping heng jie ge fan ying 。xiang guan jie guo chan ming le xie qing bai dan bai shu yun TDCPP,TCPPhe TCEPde sheng li zuo yong ,wei shen ru yan jiu lv dai lin ji zu ran ji yu sheng wu da fen zi de jie ge fan ying di gong li lun can kao 。2.fen xi TDCPP,TCPPhe TCEPzuo yong yu SMMC-7721xi bao hou de yang hua sun shang qing kuang 。cai yong CCK-8fang fa kao cha zhe san chong zu ran ji dui xi bao zeng shi de ying xiang ,que ding xi bao zeng shi yi zhi xiao ying de shi jian -liang xiao guan ji ,bing fen xi xi bao du li sun shang ji zhi 。jie guo biao ming TDCPP,TCPPhe TCEPjun neng xian zhe jiang di xi bao cun huo lv (P<0.05),ju you ming xian de xi bao du xing ,ran du 1272 hshi duan nei ju you shi jian liang xiao guan ji 。ru suan tuo qing mei (Lactate dehydrogenase,LDH)、chao yang hua wu qi hua mei (Superoxide Dismutase,SOD)、guo yang hua qing mei (Catalase,CAT)biao da de jian ce jie guo biao ming ,zhe san chong zu ran ji ke shi bao nei LDHwai lou ,er bao nei SOD、CAThan liang sui ran du nong du de zeng gao er jiang di 。ying guang ding liang PCRjie guo xian shi ,zhe san chong zu ran ji ke xia diao SOD-1、CATji yin de biao da 。yan jiu fa xian TDCPP、TCPPhe TCEPke dui SMMC-7721xi bao chan sheng yang hua sun shang du xing xiao ying ,tui duan yang hua sun shang shi sheng wu du xing xiao ying de chong yao ji zhi zhi yi 。you guan yan jiu jie guo dui ping pan lv dai lin ji zu ran ji de sheng tai du xing xiao ying ju you chong yao yi yi 。
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论文作者分别是来自浙江农林大学的顾奕,发表于刊物浙江农林大学2019-10-24论文,是一篇关于氯代磷系阻燃剂论文,人血清白蛋白论文,相互作用论文,细胞论文,氧化损伤论文,浙江农林大学2019-10-24论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自浙江农林大学2019-10-24论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:氯代磷系阻燃剂论文; 人血清白蛋白论文; 相互作用论文; 细胞论文; 氧化损伤论文; 浙江农林大学2019-10-24论文;