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Related Concept Videos

Regulation of Metabolism01:19

Regulation of Metabolism

Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Epigenetic Regulation01:37

Epigenetic Regulation

Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
Epigenetic Regulation01:46

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Replicative Cell Senescence02:15

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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 the telomeric...

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Solid Plate-based Dietary Restriction in Caenorhabditis elegans
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Published on: May 28, 2011

Caloric restriction and genomic stability.

Ahmad R Heydari1, Archana Unnikrishnan, Lisa Ventrella Lucente

  • 1Department of Nutrition and Food Science, Wayne State University, Detroit, MI 48202, USA.

Nucleic Acids Research
|October 19, 2007
PubMed
Summary
This summary is machine-generated.

Caloric restriction (CR) significantly reduces DNA damage and enhances DNA repair, potentially explaining its life-extending and anti-cancer effects. This dietary intervention impacts key DNA repair pathways, promoting genome stability.

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Area of Science:

  • Gerontology and Molecular Biology
  • Focuses on aging processes, DNA integrity, and cellular repair mechanisms.

Background:

  • Caloric restriction (CR) is known to extend lifespan and delay age-related diseases in rodents.
  • CR's proposed mechanism involves reducing accumulated DNA damage and mutations with age.
  • Genome integrity is crucial, and CR's effects on cancer and immunity align with DNA damage/repair modulation.

Purpose of the Study:

  • To investigate the impact of caloric restriction (CR) on genome integrity.
  • To determine if CR affects DNA damage accumulation and DNA repair efficiency.
  • To examine CR's influence on major DNA repair pathways.

Main Methods:

  • Review of studies over three decades examining CR's effects on DNA damage and repair.
  • Analysis of research on oxidative DNA damage levels under CR.
  • Evaluation of CR's impact on specific DNA repair pathways like NER, BER, and double-strand break repair.

Main Results:

  • The majority of studies indicate CR significantly reduces age-related oxidative DNA damage.
  • Early research suggested CR enhances DNA repair capacity.
  • CR demonstrates a significant effect on major DNA repair pathways (NER, BER, double-strand break repair).

Conclusions:

  • Caloric restriction (CR) plays a crucial role in maintaining genome integrity during aging.
  • CR mitigates DNA damage, particularly oxidative damage, and enhances DNA repair mechanisms.
  • These effects on DNA integrity likely contribute to CR's observed benefits in longevity and disease prevention.