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Intraductal Delivery and X-ray Visualization of Ethanol-Based Ablative Solution for Prevention and Local Treatment of Breast Cancer in Mouse Models

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Preventive therapy for breast cancer.

Ivana Sestak¹, Jack Cuzick

¹Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK. i.sestak@qmul.ac.uk

Current Oncology Reports

|September 14, 2012

Summary

Tamoxifen reduces estrogen receptor-positive breast cancer risk by 50%. New agents like aromatase inhibitors show promise for better prevention with fewer side effects, but research continues for receptor-negative and premenopausal cases.

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Area of Science:

Oncology
Pharmacology

Background:

Tamoxifen effectively reduces estrogen receptor-positive (ER+) breast cancer risk by over 50%.
Current research focuses on developing novel prophylactic agents with improved efficacy and reduced side effects compared to tamoxifen.

Purpose of the Study:

To review the efficacy and side effect profiles of emerging agents for breast cancer prevention.
To identify agents suitable for different patient populations, including those with ER-negative breast cancer and premenopausal women.

Main Methods:

Review of clinical trial data for tamoxifen, raloxifene, and aromatase inhibitors (e.g., anastrozole).
Analysis of results from adjuvant trials and preventive settings, including the MAP3 and IBIS-II trials.

Main Results:

Selective estrogen-receptor modulators (SERMs) like raloxifene show fewer side effects but slightly lower efficacy than tamoxifen.
Aromatase inhibitors demonstrate potential to prevent 70-80% of ER+ breast cancers, with one trial showing a 65% reduction in invasive breast cancer.
Anastrozole is under investigation in healthy postmenopausal women.

Conclusions:

Aromatase inhibitors represent a promising advancement in breast cancer prevention, particularly for ER+ disease.
Further research is essential to develop effective preventive strategies for receptor-negative breast cancer and for premenopausal women.