Androgenic to oestrogenic switch in the human adult prostate gland is regulated by epigenetic silencing of steroid 5α-reductase 2

Zongwei Wang, Libing Hu, Keyan Salari, Seth Bechis, Rongbin Ge, Shulin Wu, Cyrus Rassoulian, Jonathan Pham, Chin Lee Wu, Shahin Tabatabaei, Douglas W. Strand, Aria F. Olumi

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Benign prostatic hyperplasia is the most common proliferative abnormality of the prostate. All men experience some prostatic growth as they age, but the rate of growth varies among individuals. Steroid 5α-reductase 2 (SRD5A2) is a critical enzyme for prostatic development and growth. Previous work indicates that one-third of adult prostatic samples do not express SRD5A2, secondary to epigenetic modifications. Here we show that the level of oestradiol is dramatically elevated, concomitant with significant upregulation of oestrogen response genes, in prostatic samples with methylation at the SRD5A2 promoter. The phosphorylation of oestrogen receptor-α in prostatic stroma is upregulated when SRD5A2 expression is absent. We show that tumour necrosis factor (TNF)-α suppresses SRD5A2 mRNA and protein expression, and simultaneously promotes expression of aromatase, the enzyme responsible for conversion of testosterone to oestradiol. Concomitant suppression of SRD5A2 and treatment with TNF-α synergistically upregulate the aromatase levels. The data suggest that, in the absence of prostatic SRD5A2, there is an androgenic to oestrogenic switch. These findings have broad implications for choosing appropriate classes of medications for the management of benign and malignant prostatic diseases.

Original languageEnglish (US)
Pages (from-to)457-467
Number of pages11
JournalJournal of Pathology
Volume243
Issue number4
DOIs
StatePublished - Dec 1 2017

Keywords

  • androgenic to oestrogenic switch
  • epigenetic silencing
  • methylation
  • prostate
  • steroid 5α-reductase 2

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

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    Wang, Z., Hu, L., Salari, K., Bechis, S., Ge, R., Wu, S., Rassoulian, C., Pham, J., Wu, C. L., Tabatabaei, S., Strand, D. W., & Olumi, A. F. (2017). Androgenic to oestrogenic switch in the human adult prostate gland is regulated by epigenetic silencing of steroid 5α-reductase 2. Journal of Pathology, 243(4), 457-467. https://doi.org/10.1002/path.4985