夏西超;张科;宋国英;马向莉;宗玉霞;张明霞;李冰洁;于瑞雪;薛士鹏;刘庆春;华春秀;张庆远;

• 1:平顶山学院医学院
• 2:南阳医学高等专科学校基础医学部

摘要(Abstract)：

硫氧化蛋白过氧化物酶(Prx)可以将过氧化氢、有机过氧化物和过氧化合物分别转化为水、乙醇和亚硝酸盐,是机体一种重要的抗氧化蛋白。为了探讨全氟辛烷磺酸(PFOS)和全氟辛酸(PFOA)对背角无齿蚌的胁迫效应,背角无齿蚌随机分为对照组、PFOS处理组和PFOA处理组;同时克隆出AwPrx4A全基因序列,分析PFOS和PFOA对AwPrx4A表达的影响。背角无齿蚌AwPrx4A cDNA全长由958个核苷酸组成,包含1个120 bp的5’非编码区,1个412 bp的3’非编码区和1个426 bp的开放阅读框,开放阅读框为由142个氨基酸组成的多肽链。PFOS和PFOA对背角无齿蚌的LC50分别为28.388和192.083 mg·L~(-1)。与对照组相比,浓度6.25、12.5、25、50和100 mg·L~(-1)的PFOS处理后,实验观察过程中肝胰腺中AwPrx4A mRNA水平分别增加了18.75%、2.85倍(P <0.05)、5.08倍(P <0.01)、5.52倍(P <0.01)和6.77倍(P <0.01)以上。与对照组相比,浓度50、100、200、400和800 mg·L~(-1)的PFOA处理后,实验观察过程中肝胰腺AwPrx4A mRNA水平分别增加了20.83%、2.21倍(P <0.01)、2.25倍(P <0.01)、3.19倍(P <0.01)和5.64倍(P <0.01)以上。与对照组相比,PFOS和PFOA处理后鳃中AwPrx4A mRNA水平分别增加了61.61%(P <0.05)和59.59%(P <0.05)以上。与对照组相比,PFOS和PFOA处理后血淋巴中AwPrx4A mRNA水平分别增加了47.42%和20.61%以上。结果表明,PFOS和PFOA处理对背角无齿蚌AwPrx4A表达具有明显的诱导作用,其原因与对抗PFOS和PFOA的胁迫效应有关。

关键词(KeyWords)： 全氟辛烷磺酸;全氟辛酸;背角无齿蚌;AwPrx4A;胁迫效应

Abstract:

Keywords:

基金项目(Foundation): 河南省联合基金项目(182300410123);; 中国博士后基金项目(2016M590143)

作者(Author): 夏西超;张科;宋国英;马向莉;宗玉霞;张明霞;李冰洁;于瑞雪;薛士鹏;刘庆春;华春秀;张庆远;

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DOI:

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