Aromatase expression and regulation in breast and endometrial cancer

Hong Zhao*, Ling Zhou, Anna Junjie Shangguan, Serdar E. Bulun

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

51 Scopus citations

Abstract

Long-term exposure to excess estrogen increases the risk of breast cancer and type 1 endometrial cancer. Most of the estrogen in premenopausal women is synthesized by the ovaries, while extraovarian subcutaneous adipose tissue is the predominant tissue source of estrogen after menopause. Estrogen and its metabolites can cause hyperproliferation and neoplastic transformation of breast and endometrial cells via increased proliferation and DNA damage. Several genetically modified mouse models have been generated to help understand the physiological and pathophysiological roles of aromatase and estrogen in the normal breast and in the development of breast cancers. Aromatase, the key enzyme for estrogen production, is comprised of at least ten partially tissue-selective and alternatively used promoters. These promoters are regulated by distinct signaling pathways to control aromatase expression and estrogen formation via recruitment of various transcription factors to their cis-regulatory elements. A shift in aromatase promoter use from I.4 to I.3/II is responsible for the excess estrogen production seen in fibroblasts surrounding malignant epithelial cells in breast cancers. Targeting these distinct pathways and/or transcription factors to modify aromatase activity may lead to the development of novel therapeutic remedies that inhibit estrogen production in a tissue-specific manner.

Original languageEnglish (US)
Pages (from-to)R19-R33
JournalJournal of Molecular Endocrinology
Volume57
Issue number1
DOIs
StatePublished - Jul 1 2016

Keywords

  • Aromatase
  • Breast cancer
  • Endometrial cancer
  • Estrogen

ASJC Scopus subject areas

  • Molecular Biology
  • Endocrinology

Fingerprint Dive into the research topics of 'Aromatase expression and regulation in breast and endometrial cancer'. Together they form a unique fingerprint.

Cite this