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The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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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Summary

This study maps aging in 13 tissues of the African turquoise killifish, revealing conserved pathways and sex-specific differences. It introduces

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Area of Science:

  • Gerontology and Molecular Biology
  • Comparative Vertebrate Aging Research

Background:

  • Aging causes progressive tissue dysfunction, frailty, and mortality.
  • Understanding tissue-specific and systemic aging factors requires detailed characterization of aging features like gene expression dynamics.

Purpose of the Study:

  • To create a comprehensive resource for studying aging dynamics across multiple tissues in the African turquoise killifish.
  • To identify conserved and tissue-specific aging pathways and sex-age interactions.
  • To develop transcriptomic clocks for age prediction and evaluate interventions.

Main Methods:

  • RNA-sequencing performed on 13 tissues from 6 different ages in a sex-balanced killifish cohort.
  • Analysis of gene expression to identify age-altered pathways and sex-age interactions.
  • Development of tissue-specific transcriptomic clocks and biomarker identification.

Main Results:

  • A comprehensive 'atlas' of aging across 13 killifish tissues was generated.
  • Identified evolutionarily conserved, age-altered biological pathways and varying sex-age interaction strengths.
  • Discovered a sex-specific aging-related myeloid bias in the head kidney and developed predictive transcriptomic clocks.

Conclusions:

  • The African turquoise killifish is a valuable vertebrate model for studying aging across tissues.
  • The generated dataset provides a powerful resource for aging research, enabling studies on dietary interventions and sex-specific aging dynamics.
  • Tissue-specific transcriptomic clocks offer novel biomarkers for chronological age prediction.