14. Breast cancer prevention

Area of Science:

• Oncology
• Preventive Medicine
• Genetics

Background:

• Breast cancer risk is influenced by modifiable factors (hormones, obesity, HRT) and non-modifiable factors (genetics, age).
• The Gail model estimates lifetime risk, but modifiable factors may have limited impact on overall breast cancer incidence.
• Current prevention strategies like tamoxifen and raloxifene show mixed results and specific tumor dependencies.

Purpose of the Study:

• To review current understanding of breast cancer risk factors and prevention strategies.
• To evaluate the impact of modifiable lifestyle and medical interventions on breast cancer risk.
• To explore emerging chemoprevention candidates for breast cancer.

Main Methods:

• Literature review of studies on breast cancer risk factors, including genetic, hormonal, lifestyle, and pharmacological interventions.
• Analysis of clinical trial data for tamoxifen, raloxifene, and other agents.
• Examination of emerging chemopreventive agents and strategies for high-risk individuals.

Main Results:

• Modifiable factors like hormone levels, obesity, and HRT contribute to breast cancer risk, but their impact on overall incidence may be limited.
• Tamoxifen and raloxifene have demonstrated risk reduction in specific populations and tumor types, but with ongoing debate and limitations.
• Lifestyle factors (diet, exercise, pregnancy history) have a mild to moderate impact, while alcohol reduction offers modest benefits with potential trade-offs.
• Emerging chemoprevention candidates show promise, including aromatase inhibitors and novel SERMs.

Conclusions:

• Breast cancer risk is multifactorial, with both genetic and environmental influences.
• While some interventions show promise, effective and universally applicable prevention strategies remain a challenge.
• Further research into novel chemopreventive agents is crucial for improving breast cancer prevention outcomes.