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Formation of mutagens by heating foods and model systems
Abstract:
We have demonstrated that the pyrolysis products of amino acids and proteins in model systems are mutagenic. The mutagenic principles in the pyrolyzates of amino acids have been isolated and identified by Sugimura et al. We have isolated and identified amino-alpha-carbolines from pyrolyzed soybean globulin as mutagens. The yield of mutagens by the heating of food constituents is changed by the heating method. Effects of heating methods on the yield of amino-alpha-carbolines were studied in a series of experiments, and the results are shown in this paper. Additionally, it has been shown that by the heating of creatine-sugar mixtures imidazoquinoline or quinoxaline mutagens are formed.
Insights
Pyrolysis of amino acids and proteins creates mutagens. Researchers identified amino-alpha-carbolines in heated soybeans and found heating methods affect mutagen yield, impacting food safety.
Area of Science:
- Food Chemistry
- Toxicology
- Biochemistry
Background:
- Pyrolysis of amino acids and proteins generates mutagenic compounds.
- Previous research identified mutagenic principles in amino acid pyrolyzates.
- Amino-alpha-carbolines are known mutagens formed during high-temperature food processing.
Purpose of the Study:
- To identify and quantify mutagens formed from pyrolyzed soybean globulin.
- To investigate the influence of different heating methods on the yield of amino-alpha-carbolines.
- To explore the formation of other mutagen classes (imidazoquinolines, quinoxalines) from creatine-sugar mixtures.
Main Methods:
- Pyrolysis of soybean globulin and creatine-sugar mixtures.
- Isolation and identification of mutagenic compounds using chromatographic and spectroscopic techniques.
- Systematic variation of heating methods to assess their impact on mutagen yield.
Main Results:
- Amino-alpha-carbolines were isolated and identified as mutagens in pyrolyzed soybean globulin.
- The yield of these mutagens varied significantly depending on the heating method employed.
- Heating creatine-sugar mixtures resulted in the formation of imidazoquinoline and quinoxaline mutagens.
Conclusions:
- Heating of food constituents, particularly proteins and amino acids, can produce potent mutagens like amino-alpha-carbolines.
- Food processing conditions, specifically heating methods, critically influence the type and quantity of mutagens formed.
- Understanding these formation pathways is crucial for assessing and mitigating the mutagenic potential of cooked foods.