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Polycyclic aromatic hydrocarbons (PAHs) occur in complex mixtures present in the human environment. Because of the carcinogenic properties of some of these PAHs, they raise concerns regarding health and food safety. Because the occurrence of benzo[a]pyrene, chrysene, benz[a]anthracene, and benzo[b]fluoranthene (PAH4) are considered markers for other genotoxic PAHs in foodstuffs, the European Union has put a maximum level of PAH4 in some foodstuffs. Fluoranthene (Flu) and phenanthrene (Phe), two other PAHs, are not classified as genotoxic and are abundant at rather high concentrations in food. Inasmuch as PAH4, Flu, and Phe are metabolized by the same cytochrome P450 pathway system, it is important to clarify whether Phe and Flu influence the genotoxicity of PAH4. We have analyzed the genotoxic response of Phe and Flu, separately and together, as well as in combination with different low doses of PAH4. In all experiments we used the flow cytometer-based micronucleus tes in vivo . Phe and Flu, when administered separately, did not show any dose-related effect on the frequency of micronucleated polychromatic erythrocytes (fMNPCE). Nor did a mixture of Phe and Flu change the fMNPCEs. Phe and Flu did not significantly change the fMNPCE of PAH4-exposed FVB and BALB/c mice.

toxicology reports

Fluoranthene and phenantrene, two predominant PAHs in heat-prepared food, do not influence the frequency of micronucleated mouse erythrocytes induced by other PAHs