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Food-derived mutagens and carcinogens.
K Wakabayashi1, M Nagao, H Esumi
1National Cancer Center Research Institute, Tokyo, Japan.
Cancer Research
|April 1, 1992
Summary
Mutagenic heterocyclic amines in cooked food are carcinogenic and form DNA adducts. While dietary exposure is low, these compounds may contribute to cancer development alongside other risk factors.
Area of Science:
- Toxicology
- Carcinogenesis
- Food Chemistry
Background:
- Mutagenic heterocyclic amines (HCAs) are present in cooked foods.
- These compounds are known carcinogens in animal models.
Purpose of the Study:
- To investigate the carcinogenic potential of HCAs found in cooked food.
- To explore the mechanisms of HCA-induced carcinogenesis and human exposure levels.
Main Methods:
- Rodent and monkey models were used to assess carcinogenicity.
- Quantification of HCAs in food and human urine was performed.
- DNA adduct formation was studied in relation to HCA exposure.
Main Results:
- Most tested HCAs were carcinogenic in rodents, inducing tumors in various organs.
- Specific HCAs, like 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine and 2-amino-3-methylimidazo[4,5-f]quinoline, showed distinct carcinogenic effects.
- Humans are continuously exposed to low levels of HCAs through diet, forming DNA adducts.
Conclusions:
- HCA-induced DNA adducts are implicated in carcinogenesis.
- While low dietary HCA levels may not be sufficient to cause cancer alone, they may contribute to cancer development in the presence of other risk factors.