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Alpha-tocopherol: uses in preventing nitrosamine formation.

W J Mergens, J J Kamm, H L Newmark

    IARC Scientific Publications
    |January 1, 1978
    PubMed
    Summary
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    Alpha-tocopherol effectively scavenges nitrosating agents, preventing harmful nitrosamine formation. This vitamin E derivative significantly reduced nitrosamines in fried bacon and cigarette smoke.

    Area of Science:

    • Biochemistry
    • Toxicology
    • Food Science

    Background:

    • Nitrosamines are carcinogenic compounds formed from nitrite.
    • Nitrosamine formation is a concern in food processing and environmental exposure.
    • Alpha-tocopherol (vitamin E) is a known antioxidant.

    Purpose of the Study:

    • To evaluate alpha-tocopherol as a nitrite scavenger.
    • To assess its efficacy in preventing nitrosamine formation under various conditions.
    • To investigate its role in mitigating nitrosamine-induced toxicity.

    Main Methods:

    • In vitro studies using model systems to assess reactions with nitrosating agents.
    • In vivo studies involving rats exposed to aminopyrene and nitrite.
    • Analysis of nitrosamine levels in cigarette smoke and fried bacon.

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  • Comparative studies with alpha-tocopherol alone and in combination with sodium ascorbate.

    • Main Results:

    • Alpha-tocopherol reacted with nitrosating agents in both lipophilic and aqueous environments.
    • Inhibition of aminopyrene-nitrite induced hepatotoxicity in rats was observed.
    • Significant reduction in N-nitroso-N-methylamine (NDMA) in cigarette smoke was achieved.
    • A notable decrease in N-nitrosopyrrolidine (NPYR) formation in fried bacon was found.
    • Combined use of alpha-tocopherol and sodium ascorbate showed greater nitrosamine inhibition than sodium ascorbate alone.

    Conclusions:

    • Alpha-tocopherol is an effective nitrite scavenger for preventing nitrosamine formation.
    • Its application shows promise in reducing nitrosamine exposure from food and smoke.
    • Combination therapy with sodium ascorbate enhances nitrosamine inhibition.