Targeting Colon Luminal Lipid Peroxidation Limits Colon Carcinogenesis Associated with Red Meat Consumption

Area of Science:

• Oncology
• Nutritional Science
• Biochemistry

Background:

• Red meat consumption is linked to cancer, potentially due to heme iron-induced lipoperoxidation.
• The World Health Organization classifies red meat as probably carcinogenic to humans (IARC class 2A).

Purpose of the Study:

• To investigate if red meat promotes carcinogenesis in rodents.
• To assess if an antioxidant marinade can suppress red meat-induced effects by limiting heme-induced lipid peroxidation.
• To evaluate biomarkers of lipoperoxidation in rodents and human volunteers.

Main Methods:

• Rats and Min mice were fed marinated or non-marinated beef.
• Human volunteers participated in a crossover study involving marinated and non-marinated beef.
• Colon carcinogenesis, lipoperoxidation biomarkers (feces and urine), and organoleptic properties were assessed.

Main Results:

• Fresh beef consumption increased colon carcinogenesis and lipoperoxidation in rodents and lipoperoxidation in humans.
• The antioxidant marinade normalized peroxidation biomarkers in rodent feces and reduced them in human feces.
• The marinade decreased Mucin-depleted foci in rats and adenoma in female Min mice without negatively impacting meat taste.

Conclusions:

• An antioxidant marinade can mitigate the pro-carcinogenic effects of red meat by reducing lipid peroxidation.
• This approach shows potential for developing strategies to lower colorectal cancer risk associated with red meat intake.