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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Studying Age-dependent Genomic Instability using the S. cerevisiae Chronological Lifespan Model
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Aging is associated with a systemic length-associated transcriptome imbalance.

Thomas Stoeger1,2,3, Rogan A Grant4,5, Alexandra C McQuattie-Pimentel5

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This summary is machine-generated.

Transcript length significantly impacts aging across species. Shorter transcripts increase with age, while longer ones decrease, affecting lifespan and response to anti-aging interventions.

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Area of Science:

  • Molecular Biology
  • Genomics
  • Aging Research

Background:

  • Aging is a primary risk factor for numerous diseases and mortality.
  • Understanding the molecular mechanisms underlying aging is crucial for developing interventions.

Purpose of the Study:

  • To investigate the relationship between transcript length and age-related transcriptional changes.
  • To explore the biological significance of age-associated alterations in transcript abundance.

Main Methods:

  • Analysis of age-resolved transcriptomic data from multiple mouse and human studies.
  • Correlation analysis between transcript length and age-related gene expression patterns.
  • Evaluation of the impact of anti-aging interventions on transcript length associations.

Main Results:

  • Transcript length alone accounts for the majority of age-related transcriptional changes in mice and humans.
  • Aging is associated with a decreased relative abundance of long transcripts in vertebrates.
  • Eight anti-aging interventions demonstrated the ability to counteract this transcript length association.
  • Genes with longer transcripts are enriched for lifespan-extending functions, while shorter transcripts are linked to lifespan-shortening functions.

Conclusions:

  • Transcript length represents a fundamental factor in the aging process.
  • The observed transcriptome imbalance has significant biological implications for aging and lifespan.
  • Findings open new avenues for research into aging mechanisms and transcriptome organization.