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Syndromes of accelerated aging.

G M Martin

    National Cancer Institute Monograph
    |January 1, 1982
    PubMed
    Summary

    Genetic factors significantly influence aging. Approximately 7% of human genes may affect aging rates, with mutations leading to progeroid syndromes. Research on cultured cells aids in understanding these genetic aging disorders.

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    Area of Science:

    • Genetics
    • Gerontology
    • Molecular Biology

    Background:

    • Aging is a complex process influenced by numerous genetic factors.
    • McKusick's catalog identifies over 2,000 human genetic loci, with ~7% potentially modulating senescence.
    • Genetic variations can lead to accelerated aging phenotypes, known as progeroid syndromes.

    Purpose of the Study:

    • To explore the genetic basis of aging and progeroid syndromes.
    • To classify progeroid syndromes based on their phenotypic presentation.
    • To highlight the potential of cellular models in studying these conditions.

    Main Methods:

    • Systematic review of genetic loci associated with aging.
    • Classification of progeroid syndromes into segmental and unimodal categories.
    • Discussion of specific progeroid syndromes and their genetic underpinnings.

    Main Results:

    • Approximately 7% of human genetic loci may influence aging rates.
    • Progeroid syndromes are categorized as segmental (multiple aging aspects) or unimodal (single aspect).
    • Examples include Werner syndrome, Down syndrome, familial hypercholesterolemia, xeroderma pigmentosum, and intestinal polyposis.

    Conclusions:

    • Numerous genetic loci and their alleles contribute to individual aging patterns.
    • Progeroid syndromes, like Werner syndrome, exhibit distinct cellular phenotypes (e.g., limited replicative lifespan, chromosomal instability).
    • Cultured mesenchymal somatic cells offer a viable model for investigating the biochemical genetic basis of progeroid syndromes.

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