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Centromere separation sequence in aged women and men.

K Bajnóczky

    Acta Biologica Hungarica
    |January 1, 1985
    PubMed
    Summary

    Centromere separation sequences in aged individuals were analyzed. While aged men showed a normal pattern, aged women exhibited minor deviations, not significantly differing from the standard sequence.

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    Area of Science:

    • Cell Biology
    • Genetics
    • Gerontology

    Background:

    • The centromere's role in chromosome segregation is crucial for genomic stability.
    • Age-related chromosomal abnormalities are a concern in gerontology.
    • Understanding centromere separation timing may reveal age-associated cellular changes.

    Purpose of the Study:

    • To investigate the centromere separation sequence in elderly individuals.
    • To compare centromere separation patterns between aged men and women and young controls.
    • To determine if age affects the non-random centromere separation sequence.

    Main Methods:

    • Analysis of centromere separation sequences in lymphocyte mitoses from aged women, aged men, young females, and young males.
    • Microscopic and photographic analysis of 50 randomly selected mitoses per individual.
    • Comparison of observed sequences against established "normal sequences" from prior research.

    Main Results:

    • A non-random centromere separation sequence, consistent with the "normal sequence," was observed in young controls and aged men.
    • Aged women showed slightly earlier division of chromosomes X, 8, and 10, and later division of chromosomes 2, 3, 5, and 18.
    • These deviations in aged women did not significantly alter the overall averaged pattern from the "normal sequence."
    • Premature centromere division (PCD) of chromosome X was not linked to X-aneuploidy or the "long acentric fragment" in aged females.

    Conclusions:

    • The centromere separation sequence remains largely conserved in aged men, mirroring younger controls.
    • Aged women exhibit subtle, non-conspicuous deviations in centromere separation timing compared to the established "normal sequence."
    • Premature centromere division of chromosome X in aged women does not appear to be associated with aneuploidy or specific chromosomal fragments.

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