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Updated: Jun 4, 2026
10:38
Evaluating the Differentiation Capacity of Mouse Prostate Epithelial Cells Using Organoid Culture
Published on: November 22, 2019
17-Beta-estradiol induces neoplastic transformation in prostatic epithelial cells
Shan Yu1, Yan Zhang, Mong-Ting Yuen
1Cancer and Inflammation Program, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, New Territories, Hong Kong, China.
Cancer Letters
|March 1, 2011
Summary
17β-estradiol (E2) exposure in vitro neoplastically transformed rat prostatic epithelial cells. This study provides direct evidence that E2 is carcinogenic to prostatic epithelial cells, inducing DNA damage and cancer stem cell marker expression.
Area of Science:
- Endocrinology
- Cancer Biology
- Cellular Transformation
Background:
- Estrogens are implicated in prostate carcinogenesis, but direct evidence of their carcinogenicity on prostatic epithelial cells is lacking.
- Understanding the role of estrogens in prostate cancer development is crucial for prevention and treatment strategies.
Purpose of the Study:
- To investigate the direct carcinogenic effects of 17β-estradiol (E2) on rat prostatic epithelial cells in vitro.
- To characterize the phenotypic and molecular changes associated with E2-induced transformation.
Main Methods:
- Treatment of immortalized rat prostatic epithelial cells (NRP-152) with E2 (1-3 microM for 2-6 weeks).
- Assessing anchorage-independent growth using soft agar assays.
- Evaluating tumor formation in immunodeficient nude mice and spheroid formation in Matrigel 3D-culture.
- Analyzing protein and gene expression (ERα, ERβ, AR, cancer stem cell markers) via Western blot and RT-PCR.
- Detecting DNA damage using comet assays.
Main Results:
- E2 treatment induced neoplastic transformation of NRP-152 cells, evidenced by colony formation in soft agar and tumor development in vivo.
- Transformed cells lost spheroid formation capacity and exhibited altered expression of estrogen receptor alpha (ERα), estrogen receptor beta (ERβ), and androgen receptor (AR).
- Increased expression of putative prostate cancer stem cell markers (integrins α2β1, CD44, CD133, ABCG2, CXCR4) and DNA damage (comet cells) were observed following E2 exposure.
Conclusions:
- In vitro exposure to 17β-estradiol (E2) can neoplastically transform rat prostatic epithelial cells.
- E2 demonstrates direct carcinogenicity towards prostatic epithelial cells, inducing DNA damage and promoting a cancer stem cell phenotype.
- These findings highlight the potential role of E2 in prostate carcinogenesis.
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