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Related Experiment Video

Updated: May 28, 2026

An Ex vivo Model to Study Hormone Action in the Human Breast

An Ex vivo Model to Study Hormone Action in the Human Breast

Published on: January 8, 2015

Androgens and breast cancer.

Joanne Kotsopoulos¹, Steven A Narod

¹Women's College Research Institute, Toronto, ON, Canada.

|October 22, 2011

Summary

Androgens

Area of Science:

Endocrinology
Oncology
Reproductive Health

Background:

The precise role of androgens in breast cancer development and progression remains unclear.
Conflicting evidence exists: in vitro studies suggest inhibition, while epidemiological studies indicate a positive association with breast cancer risk.
Androgen receptor expression is linked to a better prognosis in breast cancer patients.

Purpose of the Study:

To review existing literature on the role of androgens in breast carcinogenesis.
To clarify the dualistic effects of androgens on breast tissue.
To inform clinical decisions regarding testosterone replacement therapy in menopausal women, especially those at high risk.

Main Methods:

Literature review of in vivo and in vitro studies.

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Analysis of epidemiological data on androgen levels and breast cancer risk.

Examination of studies on androgen receptor expression as a prognostic marker.

Main Results:

In vitro and in vivo studies suggest androgens may inhibit mammary epithelium growth.
Epidemiological studies frequently report a positive correlation between high androgen levels and increased breast cancer risk.
Androgen receptor expression is identified as a positive prognostic indicator in breast cancer.

Conclusions:

The role of androgens in breast cancer etiology is complex and requires further investigation.
Understanding androgen effects is crucial for women undergoing testosterone replacement therapy post-menopause.
Further research is needed to reconcile conflicting findings and guide therapeutic strategies.