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Updated: May 8, 2026
08:02
Visualization of Estrogen Receptors in Colons of Mice with TNBS-Induced Crohn's Disease using Immunofluorescence
Published on: March 12, 2020
Molecular pathways: Estrogen pathway in colorectal cancer
Afsaneh Barzi1, Annika Medea Lenz, Melissa J Labonte
1Authors' Affiliations: USC Norris Comprehensive Cancer Center, Los Angeles; and Azusa Pacific University, Azusa, California.
Summary
Estrogen, particularly through ERβ, may protect against colorectal cancer. Hormone replacement therapy and soy consumption show reduced incidence, suggesting estrogen
Area of Science:
- Oncology
- Endocrinology
- Gastroenterology
Background:
- Colorectal cancer (CRC) incidence is higher in men, suggesting sex hormone influence.
- Estrogen and its receptors, especially ERβ, play a role in CRC initiation and progression.
- Hormone replacement therapy (HRT) and soy consumption are linked to reduced CRC incidence.
Purpose of the Study:
- To review preclinical and clinical data on estrogen's role in CRC prevention.
- To hypothesize the mechanism of estrogen's protective effects via ERβ.
- To identify factors influencing estrogen's efficacy in CRC prevention.
Main Methods:
- Review of preclinical data on estrogen and ERβ in CRC.
- Analysis of clinical trials (e.g., Women's Health Initiative) and meta-analyses on HRT and soy.
- Synthesis of findings to define estrogen's preventive role in CRC.
Main Results:
- HRT reduced colon cancer risk by 56% in postmenopausal women.
- Soy consumption reduced colon cancer risk by 21% in women.
- Estrogen's protective effects may involve preventing ERβ loss during tumorigenesis.
Conclusions:
- Estrogen, HRT, and soy may prevent CRC by maintaining ERβ expression.
- The timing of HRT and specific molecular subtypes influence estrogen's protective effects.
- Further research into the estrogen pathway is crucial for developing preventive strategies.
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