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An Orthotopic Murine Model of Human Prostate Cancer Metastasis
Published on: September 18, 2013
Gum mastic increases maspin expression in prostate cancer cells
Mei-lan He1, Wei-wen Chen, Peng-ju Zhang
1Department of Biochemistry, Medical School, Shandong University, Ji-nan 250012, China.
Acta Pharmacologica Sinica
|March 23, 2007
Summary
Gum mastic, a natural resin, up-regulates maspin expression in prostate cancer cells by influencing key promoter elements. This study reveals a novel mechanism for gum mastic in cancer research.
Area of Science:
- Oncology
- Molecular Biology
- Natural Products Chemistry
Background:
- Maspin is a serine protease inhibitor with tumor suppressive roles in various cancers.
- Prostate cancer progression is often associated with altered maspin expression.
- Natural compounds are being investigated for their therapeutic potential in cancer treatment.
Purpose of the Study:
- To investigate the effect of gum mastic on maspin expression in prostate cancer cells.
- To elucidate the molecular mechanisms underlying gum mastic's regulation of maspin.
- To explore the potential of gum mastic as a modulator of tumor suppressor genes.
Main Methods:
- Reverse Transcription Polymerase Chain Reaction (RT-PCR) for maspin mRNA levels.
- Western blotting for maspin protein expression.
- Reporter gene assays to assess maspin promoter activity.
- Electrophoretic Mobility Shift Assay (EMSA) to study transcription factor binding.
Main Results:
- Gum mastic significantly increased both maspin mRNA and protein expression.
- Treatment with gum mastic enhanced maspin promoter activity.
- Gum mastic inhibited the binding activity of the androgen-responsive element (ARE) and increased Sp1 binding to the maspin promoter.
Conclusions:
- Gum mastic up-regulates maspin expression at transcriptional and translational levels.
- The mechanism involves modulation of ARE and Sp1 binding to the maspin promoter.
- Gum mastic shows potential as a therapeutic agent for prostate cancer by enhancing tumor suppressor maspin.
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