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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence
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Telomere Length and Telomerase Activity; A Yin and Yang of Cell Senescence

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Telomere uncapping and vascular aging.

R Garrett Morgan1, Anthony J Donato1,2,3, Ashley E Walker1,4

  • 1Department of Internal Medicine, University of Utah , Salt Lake City, Utah.

American Journal of Physiology. Heart and Circulatory Physiology
|March 17, 2018
PubMed
Summary
This summary is machine-generated.

Telomere uncapping, not shortening, is crucial for aging. This process triggers cellular senescence and inflammation, making it a key target for antiaging interventions and a marker of vascular aging.

Keywords:
agingsenescencetelomere dysfunctionvascular function

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Area of Science:

  • Cellular and Molecular Biology
  • Gerontology
  • Vascular Biology

Background:

  • Telomere shortening is the traditional focus in telomere biology.
  • Telomere deprotection, or uncapping, is increasingly recognized for its biological significance.
  • Telomeres normally form t-loops to prevent DNA damage responses.

Purpose of the Study:

  • To review the mechanisms and consequences of telomere uncapping.
  • To argue that telomere uncapping is more biologically relevant than telomere shortening.
  • To highlight telomere uncapping as a marker of vascular aging and a target for antiaging strategies.

Main Methods:

  • Review of existing literature on telomere biology, uncapping, and aging.
  • Analysis of evidence linking telomere uncapping to cellular senescence, oxidative stress, and inflammation.
  • Examination of the role of telomere uncapping in age-related vascular dysfunction.

Main Results:

  • Telomere uncapping can initiate DNA damage responses, leading to cellular senescence.
  • Uncapped telomeres contribute to oxidative stress and inflammation in tissues.
  • Telomere uncapping is implicated in age-related vascular dysfunction.

Conclusions:

  • Telomere uncapping is a more significant biological process than telomere shortening.
  • Telomere uncapping serves as a better indicator of vascular aging.
  • Targeting telomere uncapping holds potential for antiaging interventions.