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Related Concept Videos

Telomeres and Telomerase02:41

Telomeres and Telomerase

In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.

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Optimization of Performance Parameters of the TAGGG Telomere Length Assay
08:23

Optimization of Performance Parameters of the TAGGG Telomere Length Assay

Published on: April 21, 2023

Quantifying telomere length: from bulk assays to single-molecule resolution.

Kangkang Ma1, Zhongbo Yu1

  • 1State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin 300350, China.

Biophysics Reports
|June 29, 2026
PubMed
Summary

Telomere length (TL) distribution, not just the average, is key for understanding aging and disease risk. Single-molecule studies offer crucial insights into individual telomere lengths for better clinical management.

Keywords:
Magnetic tweezersNanoporeSingle-moleculeTelomere lengthTerminal restriction fragments

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11:44

Monochrome Multiplex Quantitative PCR Telomere Length Measurement

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Area of Science:

  • Genetics
  • Molecular Biology
  • Biomarkers

Background:

  • Telomere length (TL) is a critical biomarker for aging, age-associated diseases, and cancer.
  • Current methods often report average or relative TL, potentially obscuring important biological information.
  • The distribution of telomere lengths holds significant clinical relevance.

Purpose of the Study:

  • To review various techniques for measuring telomere length.
  • To emphasize the importance and application of single-molecule methods for TL analysis.
  • To highlight the significance of TL distribution over average TL.

Main Methods:

  • Review of existing literature on telomere length measurement techniques.
  • Focus on single-molecule methods for quantitative TL distribution analysis.
  • Discussion of the biological and clinical implications of different TL measurements.

Main Results:

  • Average TL, short TL, and long TL have distinct significances in aging and disease.
  • Short TL is linked to age-related disease risk.
  • Long TL is associated with certain cancers and increased cancer mortality.
  • Single-molecule techniques provide quantitative TL distributions, crucial for understanding telomere biology.

Conclusions:

  • Telomere length distribution is more informative than average TL alone.
  • Single-molecule studies offer unprecedented insights into human telomere dynamics.
  • Advancements in single-molecule TL analysis will be pivotal for managing age-associated diseases and cancer.