Diet and prostate cancer.

Area of Science:

• Oncology
• Nutritional Science
• Epidemiology

Background:

• Epidemiological studies suggest dietary factors, particularly high fat intake and meat consumption, are linked to prostate carcinogenesis.
• Heterocyclic amines (HCAs), found in charcoal-cooked meats, like 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP), are known carcinogens in animal models.
• While PhIP is linked to breast cancer in humans, its role in prostate cancer is less clear.

Purpose of the Study:

• To review the evidence on dietary factors influencing prostate carcinogenesis.
• To investigate the role of high-fat diets and specific carcinogens like PhIP in prostate cancer.
• To highlight potential protective dietary components.

Main Methods:

• Review of epidemiological studies on immigrant populations.
• Analysis of experimental data from animal models of prostate carcinogenesis.
• Examination of research on heterocyclic amines and micronutrients in cancer development.

Main Results:

• High-fat diets show inconsistent effects on prostate carcinogenesis in animal models.
• 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) induces prostate cancer in rats, but human epidemiological evidence is lacking.
• Carotenoids and isoflavones show consistent preventive potential in animal studies, unlike high-fat diets.

Conclusions:

• Diet significantly influences prostate carcinogenesis, but specific human dietary factors require further clarification.
• While high-fat diets and PhIP are implicated, their precise roles in human prostate cancer need more investigation.
• Micronutrients like carotenoids and isoflavones show promise as protective dietary factors against prostate cancer.