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[Activity of natural killer cells and their sensitivity to interferon in aged mice]

L V Van'ko, N N Bakuradze, G T Sukhikh

    Biulleten' Eksperimental'Noi Biologii I Meditsiny
    |April 1, 1984
    PubMed

    Insights

    Natural killer cell activity declines with age. While interferon and its inducer boost activity in young mice, they show no significant effect in older mice, indicating age-related immune system changes.

    Area of Science:

    • Immunology
    • Gerontology
    • Cellular Biology

    Background:

    • Natural killer (NK) cells are crucial for innate immunity.
    • Age-related decline in immune function is a significant concern.
    • Interferon and poly-I:C are known immunomodulators.

    Purpose of the Study:

    • To investigate age-related differences in NK cell activity.
    • To examine the effects of interferon and poly-I:C on NK cell activity in young and old mice.

    Main Methods:

    • Assessed NK cell activity using the 51Cr-release microtest.
    • Quantified NK cell conjugates with target cells in agarose.
    • Administered poly-I:C or interferon to mice.
    • Treated splenocytes in vitro with interferon.

    Main Results:

    • NK cell activity and conjugate formation were significantly lower in old mice compared to young mice.
    • Poly-I:C or interferon administration enhanced NK cell activity in young mice.
    • No significant enhancement of NK cell activity was observed in old mice following treatment.

    Conclusions:

    • Aging is associated with reduced natural killer cell function.
    • Interferon and poly-I:C can stimulate NK cell activity in younger individuals.
    • Older mice exhibit a diminished response to these immunomodulatory agents, suggesting age-related immune dysregulation.

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