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低浓度苯并[a]芘诱导赤子爱胜蚓HSP70和HSP90转录上调研究

郑森林1,2,3;孙铁珩1;肖红1;邱晓燕4;宋玉芳1   

  1. 1中国科学院沈阳应用生态研究所, 沈阳 110016; 2中国科学院研究生院, 北京 100049; 3国家海洋局第三海洋研究所, 福建厦门 361005; 4集美大学生物工程学院, 福建厦门 361021
  • 收稿日期:2007-04-03 修回日期:1900-01-01 出版日期:2008-02-21 发布日期:2008-02-21

Low dose benzo(a)pyrene up-regulated the transcription of HSP70 and HSP90 in Eisenia fetida. 

ZHENG Sen-lin1,2,3; SUN Tie-heng1; XIAO Hong1; QIU Xiao-yan4; SONG Yu-fang1    

  1. 1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 3Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, Fujian, China; 4School of Bioengineering, Jimei University, Xiamen 361021, Fujian, China

  • Received:2007-04-03 Revised:1900-01-01 Online:2008-02-21 Published:2008-02-21

摘要: 为寻找土壤低浓度多环芳烃污染分子生物标记物,采用了抑制消减双杂交的方法构建了赤子爱胜蚓在苯并[a]芘(BaP)人工土壤污染胁迫下的差异表达cDNA文库,经测序和基因比对分析后,在上调文库中分别发现2个与热休克蛋白HSP70和1个与HSP90显著匹配的cDNA克隆.经定量PCR验证了0。1 mg·kg-1和1。0 mg·kg-1 BaP对赤子爱胜蚓HSP70和HSP90的诱导作用,表明这两个新克隆到的赤子爱胜蚓热休克蛋白基因可作为土壤污染监测的备选分子生物标记物.

关键词: 源-库, 干旱胁迫, 复水, 补偿效应

Abstract: To search for the molecular biomarkers of sub-lethal polycyclic aromatic hydrocarbons (PAHs)-contamination of soil, the subtractive cDNA libraries of earthworm Eisenia fetida exposed to benzo(a)pyrene (BaP) in artificial soil were constructed by suppression subtractive hybridization. After sequencing and analyzing with basic local alignment search tool (BLAST), two clones matching heat shock protein 70 k Da (HSP70) and one clone matching heat shock protein 90 k Da (HSP90) were isolated from the upregulated library, and subsequently, the up-regulation of HSP70 and HSP90 was verified by real-time PCR in E. fetida exposed to 0.1 mg·kg-1 and 1.0 mg·kg-1 BaP. It was indicated that these two newly identified HSPs in E. fetida were the potential molecular biomarkers for soil contamination monitoring.

Key words: re-watering, compensation effect, drought stress, source-sink