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Related Concept Videos

Aging01:26

Aging

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.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Psychoneuroimmunology: Diabetes and Cancer01:19

Psychoneuroimmunology: Diabetes and Cancer

Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...
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...
Replicative Cell Senescence02:15

Replicative Cell Senescence

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...
Replicative Cell Senescence02:15

Replicative Cell Senescence

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...
Mitochondria01:37

Mitochondria

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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Related Experiment Video

Updated: Jul 2, 2026

Genetic Studies of Human DNA Repair Proteins Using Yeast as a Model System
14:09

Genetic Studies of Human DNA Repair Proteins Using Yeast as a Model System

Published on: March 18, 2010

Werner Syndrome, aging and cancer.

A Ozgenc1, L A Loeb

  • 1The Joseph Gottstein Memorial Cancer Research Laboratory, Department of Pathology, University of Washington, Seattle, Wash., USA.

Genome Dynamics
|August 30, 2008
PubMed
Summary

Werner syndrome (WS) is a rare genetic disorder causing premature aging. Research into the WRN protein

Area of Science:

  • Genetics
  • Molecular Biology
  • Aging Research

Background:

  • Werner syndrome (WS) is a rare autosomal recessive disorder characterized by symptoms of premature aging.
  • WS serves as a model for studying normative aging and related pathologies like cancer, atherosclerosis, and diabetes.
  • The defective gene product in WS is WRN, a RecQ DNA helicase crucial for genomic stability.

Purpose of the Study:

  • To summarize the clinical features and progression of Werner syndrome.
  • To detail the current understanding of the WRN protein's biochemistry and interactions.
  • To explore the putative in vivo roles of WRN in DNA transactions.

Main Methods:

  • Review of existing literature on Werner syndrome.
  • Biochemical analysis of the WRN protein.

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  • Identification of WRN interacting protein partners.
  • Main Results:

    • Significant advances in understanding WRN biochemistry and protein interactions.
    • WRN protein preferentially operates on non-canonical DNA structures.
    • The precise in vivo molecular functions of WRN remain largely elusive.

    Conclusions:

    • Werner syndrome provides a unique window into aging and genomic instability.
    • Further research is needed to elucidate the in vivo functions of the WRN protein.
    • Understanding WRN's role is critical for addressing aging-related diseases.