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Xeno-oestrogens bisphenol a and diethylstilbestrol selectively activating androgen receptor mediated AREs-TATA reporter system

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Abstract

We cloned the three androgen response elements(AREs, including AREI, AREII, and AREIII) with a core transactivation TATA element of the prostate-specific antigen(PSA) promoter into pGL2 basic vector to create an artificial pGL2/AREs-TATA reporter system, which was applied to evaluating the effects of different xeno-oestrogens[bisphenol A(BPA), 4-nonylphenol(4-NP), dichlorodiphenyl trichloroethane(DDT) or diethylstilbestrol (DES)] on androgen receptor(AR) abnormal activation to regulate PSA expression and cell proliferation. In all the three AREs, AREIII-TATA displayed as a major element responsive to AR-mediated DHT stimulation of PSA promoter. Therefore, pGL2/AREIII-TATA reporter was adopted to analyze the activation capacity of AR activated by four different xeno-oestrogens. The activation of pGL2/AREIII-TATA reporter by each xeno-oestrogen was analyzed in two different cell lines, one was HEK293T(Human Embryonic Kidney 293T) cell line, and the other was AR stably expressed DU145 cell line, which was produced by infecting AR with pLenti-puro-AR into the prostate cancer DU145 cells and that were scanned with puromycin and tested by AR antibody. In both the two cell lines, BPA or DES significantly induced AR-mediated transcriptional activity of AREIII-TATA reporter, whereas DDT or 4-nonylphenol did not. Moreover, AR-mediated cell proliferation in response to each of four xeno-oestrogens was measured in MTT assays in both HEK293T cell or AR stably expressed DU145 cell lines. BPA or DES, as an AR inducer, exhibited an enhanced effect in cell proliferation, rather than the effect of DDT or 4-NP, in both cell lines. Finally, we demonstrated that BPA or DES stimulated PSA expression and enhanced the recruitment of AR onto the PSA promoter, resulting in stronger binding to AREIII sites. Taken together, four xeno-oestrogens were identified to have different activities on AR. BPA and DES are demonstrated to be androgenic effectors in the regulation of PSA activation or cell proliferation.

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Authors and Affiliations

  1. Dental Hospital, Jilin University, Changchun, 130041, P. R. China

    Jing Wu, Wei Wei & Jiang Li

  2. Institute of Genetics and Cytology, School of Life Sciences, Northeast Normal University, Changchun, 130024, P. R. China

    Jing Wu, Nan-yang Yang, Xiao-yan Shen & Xiao-meng Li

  3. Department of Public Health, Tohoku University, Sendai, 980-8576, Japan

    Ichiro Tsuji

  4. Department of Nutritional Sciences, Morioka University, Morioka, 020-0183, Japan

    Takaki Yamamura

Authors
  1. Jing Wu
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  2. Wei Wei
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  3. Nan-yang Yang
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  4. Xiao-yan Shen
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  5. Ichiro Tsuji
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  6. Takaki Yamamura
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  7. Jiang Li
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  8. Xiao-meng Li
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Corresponding authors

Correspondence to Jiang Li or Xiao-meng Li.

Additional information

Supported by the Ministry of Science and Technology, China(No.2010DFA31430), the Ministry of Education of China (Nos.NCET-10-0316, 101020031), the Jilin Provincial Science & Technology Department, China(Nos.20070719, 200905116), Changchun Science & Technology Department, China(No.2011114-11GH29).

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Wu, J., Wei, W., Yang, Ny. et al. Xeno-oestrogens bisphenol a and diethylstilbestrol selectively activating androgen receptor mediated AREs-TATA reporter system. Chem. Res. Chin. Univ. 29, 512–518 (2013). https://doi.org/10.1007/s40242-013-2248-y

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  • DOI: https://doi.org/10.1007/s40242-013-2248-y

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