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Related Concept Videos

Aging01:26

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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Nonlinear dynamics of multi-omics profiles during human aging.

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Aging impacts healthspan through nonlinear molecular changes. Key shifts occur around ages 44 and 60, affecting immune, metabolic, and cardiovascular functions, offering new therapeutic targets.

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Area of Science:

  • Gerontology
  • Molecular Biology
  • Human Aging Research

Background:

  • Aging is linked to most diseases, making healthspan extension a critical goal.
  • Previous aging research often focused on linear molecular changes, overlooking critical nonlinear shifts.
  • Disease prevalence and mortality risk accelerate at specific ages, suggesting nonlinear aging processes.

Purpose of the Study:

  • To investigate nonlinear molecular changes during human aging.
  • To identify specific age periods and molecular pathways associated with accelerated aging.
  • To provide insights for therapeutic targets to increase healthspan.

Main Methods:

  • Comprehensive multi-omics profiling of 108 participants (ages 25-75).
  • Longitudinal study design with a median follow-up of 1.7 years (max 6.8 years).
  • Analysis of molecular markers to identify nonlinear aging patterns.

Main Results:

  • Identified significant nonlinear molecular changes in aging at approximately 44 and 60 years of age.
  • Observed distinct molecular and pathway dysregulations at these transition points.
  • Found immune regulation and carbohydrate metabolism shifts at 60 years; cardiovascular, lipid, and alcohol metabolism changes at 44 years.

Conclusions:

  • Human aging and aging-related disease risks exhibit significant nonlinear changes across the lifespan.
  • Specific molecular pathways undergo substantial alterations during key aging transitions.
  • This research offers novel insights into molecular mechanisms driving aging and potential targets for healthspan interventions.