Breast cancer and obesity

Area of Science:

• Endocrinology
• Oncology
• Nutritional Science

Background:

• Breast cancer is an endocrine-related tumor linked to Western lifestyles and dietary habits.
• Distinguishing between premenopausal and postmenopausal breast cancer is crucial, as risk factors differ.
• Visceral obesity and weight gain are key risk factors for postmenopausal breast cancer due to hormonal changes.

Purpose of the Study:

• To explore the relationship between lifestyle, obesity, diet, and breast cancer risk.
• To differentiate risk factors for premenopausal versus postmenopausal breast cancer.
• To propose potential dietary interventions for breast cancer prevention.

Main Methods:

• Review of epidemiological evidence linking lifestyle, obesity, and hormonal factors to breast cancer.
• Analysis of the endocrine functions of adipose tissue and its role in hormone metabolism.
• Examination of dietary patterns, including fat intake, protein sources, and carbohydrate types.

Main Results:

• Visceral obesity increases free steroid hormones, impacting mammary gland sensitivity to estrogens.
• Adipose tissue plays an endocrine role in androgen clearance and aromatization.
• Western diets high in saturated fats and animal proteins, and low in fruits/vegetables, increase breast cancer risk.

Conclusions:

• Dietary modifications, including reduced fat and alcohol, increased fiber, and complex carbohydrates, may lower breast cancer risk.
• For premenopausal women with male obesity and menstrual irregularities, a short-term tryptophan-deprived diet is suggested based on animal research.
• Understanding hormonal and metabolic changes related to obesity and diet is vital for breast cancer prevention strategies.