In-depth Biological Monitoring to Estimate Effects of Red or Processed Meat on Colorectal Cancer

Area of Science:

• Biomarkers
• Oxidative Stress
• Colorectal Cancer (CRC)

Background:

• The role of red and processed meat in colorectal cancer (CRC) etiology is debated.
• In-depth biological monitoring was conducted to investigate this association.
• Korean dietary habits differ from Western populations.

Purpose of the Study:

• To assess the relationship between meat consumption, biomarkers, and CRC risk in a Korean population.
• To investigate oxidative stress markers and heterocyclic amine (HCA) DNA adducts.
• To explore potential differences in biomarkers between CRC cases and controls.

Main Methods:

• A case-control study involving 218 Korean participants.
• Analysis of exposure and response biomarkers: 1-OHP, MeIQx, PhIP, malondialdehyde (MDA), and HCA-DNA adducts.
• Assessment of dietary intake, lifestyle factors, and meat consumption patterns.

Main Results:

• CRC risk was associated with sex, BMI, smoking, alcohol, meat cooking methods, and vegetable intake, not directly with meat consumption.
• MDA levels correlated positively with 1-OHP, MeIQx, and PhIP.
• Biomarkers for CRC were interconnected, but generally not elevated in CRC patients compared to controls.

Conclusions:

• Red and processed meat may induce oxidative stress, but current intake levels and associated stress are not linked to CRC prevalence in Koreans.
• Lower meat consumption in the Korean population might explain the lack of association with CRC.
• Further research is needed to understand the complex interplay of diet, biomarkers, and CRC in diverse populations.