Direct determination of estrogenic and antiestrogenic activities using an enhanced plant two-hybrid system

被引:6
作者
Takahashi, Yohsuke
Tojo, Takuto
Nagahora, Shinichiro
Yamazaki, Ken-ichi
机构
[1] Hokkaido Univ, Grad Sch Environm Earth Sci, Lab Environm Mol Biol, Kita Ku, Sapporo, Hokkaido 0600810, Japan
[2] Hokkaido Inst Environm Sci, Environm Studies Dept, Kita Ku, Sapporo, Hokkaido 0600819, Japan
关键词
Arabidopsis thaliana; bioassay; co-activator; endocrine disrupting chemicals (EDCs); 17 beta-estradiol estrogen receptor (ER); beta-glucuronidase (GUS); reporter-gene assay; transcriptional intermediary factor 2 (TIF2); enhanced plant two-hybrid (EPTH) system; transgenic plant;
D O I
10.1021/jf0632482
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
This paper reports a simple, low-cost, and extremely sensitive reporter-gene assay system for comprehensive analysis of estrogenic activity using transgenic Arabidopsis thaliana: the EPTH system. It had the capability to detect 17 beta-estradiol at a concentration of 10 pM. The system was rendered 5 times more sensitive than a previous system [Tojo, T.; Tsuda, K.; Wada, T.; Yamazaki, K. Ecotoxicol. Environ. Saf. 2006, 64, 106-114) (1)] by increasing the copy number of the transactivation domain fused to a nuclear receptor co-activator. The system can efficiently detect other estrogenic and antiestrogenic substances. Estrogenic activities were determined in treated sewage samples from four distinct sewage farms using the system. Results showed that the system can detect estrogenic activity directly and more efficiently than a yeast two-hybrid system without any manipulation for extraction and condensation of hydrophobic compounds and aseptic treatment. Furthermore, the system also is useful as a powerful tool for discovery of a new category of natural estrogenic substances that are undetectable by previous plant and yeast systems.
引用
收藏
页码:2923 / 2929
页数:7
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