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Anti-Androgen Receptor Signaling and Prostate Cancer Inhibitory Effects of Sucrose- and Benzophenone-Compounds

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Abstract

Purpose

Novel agents that target multiple aspects of androgen receptor (AR) signaling are desirable for chemoprevention and treatment of prostate cancer (PCa). We aimed to identify compounds isolated from medicinal herbs as such drug candidates.

Methods

In the LNCaP human androgen sensitive PCa cell model, we tested five compounds purified from Lindera fruticosa Hemsley in the range of 10–50 μM for growth inhibition and AR-prostate specific antigen (PSA) suppressing potency. We determined the relationship between these activities and P53 tumor suppressor protein activation and apoptotic cleavage of PARP. We compared these compounds to the anti-androgen drug Casodex/bicalutamide to identify mechanistic novelty.

Results

Among 3 sucrose compounds, beta-D-(3,4-di-sinapoyl)fructofuranosyl-alpha-D-(6-sinapoyl)glucopyranoside decreased AR and PSA mRNA and protein levels in LNCaP cells and inhibited androgen-stimulated AR translocation from the cytosol to the nucleus. This compound also increased P53 Ser15 phosphorylation and PARP cleavage in LNCaP cells, but required higher dosage than for suppressing AR-PSA. Interestingly, this compound did not inhibit the growth of RWPE-1 non-transformed prostate epithelial cells. The benzophenone compound 2-methoxy-3,4-(methylenedioxy)benzophenone suppressed PSA and AR in LNCaP cells without apoptosis.

Conclusions

Our data support novel anti-AR actions of these herbal compounds distinct from Casodex and merit further investigation as drug candidates.

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ACKNOWLEDGMENT

This work was supported in part by The Hormel Foundation, Prostate Cancer Foundation, by MRC grant R13-2007-019-00000-0 from Korea Ministry of Education, Science and Technology. The authors thank Todd Schuster for performing flow cytometry analyses.

Conflict of interest statements

All authors have no personal or financial conflict of interest and have not entered into any agreement that could interfere with our access to the data on the research or on our ability to analyze the data independently, to prepare manuscripts and to publish them.

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Authors and Affiliations

  1. Hormel Institute, University of Minnesota, 801 16th Avenue, N.E., Austin, Minnesota, 55912, USA

    Zhe Wang, Hyo-Jeong Lee, Lei Wang, Cheng Jiang, Sung-Hoon Kim & Junxuan Lü

  2. Cancer Preventive Material Development Research Center and Institute, College of Oriental Medicine, Kyunghee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul, 131-701, Republic of Korea

    Hyo-Jeong Lee & Sung-Hoon Kim

  3. Graduate School of Biotechnology and Plant Metabolism Research Center, Kyunghee University, Yongin, Republic of Korea

    Nam-In Baek

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  1. Zhe Wang
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  2. Hyo-Jeong Lee
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  3. Lei Wang
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  4. Cheng Jiang
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  5. Nam-In Baek
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  6. Sung-Hoon Kim
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  7. Junxuan Lü
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Correspondence to Sung-Hoon Kim or Junxuan Lü.

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Wang, Z., Lee, HJ., Wang, L. et al. Anti-Androgen Receptor Signaling and Prostate Cancer Inhibitory Effects of Sucrose- and Benzophenone-Compounds. Pharm Res 26, 1140–1148 (2009). https://doi.org/10.1007/s11095-009-9833-2

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  • DOI: https://doi.org/10.1007/s11095-009-9833-2

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