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Related Concept Videos

Epigenetic Regulation01:46

Epigenetic Regulation

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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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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...
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Pulmonary Function Tests01:25

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Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
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Related Experiment Video

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DNA methylation is associated with lung function in never smokers.

Maaike de Vries1,2, Ivana Nedeljkovic3, Diana A van der Plaat4,5

  • 1University of Groningen, University Medical Center Groningen, Department of Epidemiology, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands. m.de.vries04@umcg.nl.

Respiratory Research
|December 4, 2019
PubMed
Summary

Epigenetic changes in DNA methylation are linked to lung function in individuals who have never smoked. This study identified 35 novel CpG sites associated with FEV1/FVC, suggesting a role beyond smoking in COPD pathogenesis.

Keywords:
COPDDNA methylationEWASFEV1/FVCNever smokers

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Area of Science:

  • Genomics
  • Epigenetics
  • Pulmonology

Background:

  • Active smoking is a primary risk factor for Chronic Obstructive Pulmonary Disease (COPD).
  • Cigarette smoking is known to cause differential DNA methylation in blood.
  • The role of epigenetics in never-smokers with COPD remains unclear.

Purpose of the Study:

  • To identify differential DNA methylation associated with lung function in never-smokers.
  • To investigate whether epigenetic modifications play a role in COPD development among non-smokers.

Main Methods:

  • Epigenome-wide DNA methylation analysis of 396,243 CpG-sites in blood from four independent cohorts of never-smokers.
  • Meta-analysis of cohort-specific methylation data to identify differentially methylated CpG-sites associated with FEV1/FVC (Forced Expiratory Volume in 1 second/Forced Vital Capacity).
  • Expression Quantitative Trait Methylation (eQTM) analysis was conducted.

Main Results:

  • 36 CpG-sites were associated with FEV1/FVC in never-smokers (p<0.0001).
  • 35 of these CpG-sites were novel, not previously linked to lung function in studies including smokers.
  • Top associated CpG-sites were linked to LTV1 and KLHL32 genes; 11 eQTMs were identified.

Conclusions:

  • DNA methylation is associated with FEV1/FVC in never-smokers.
  • These findings indicate that epigenetic mechanisms contribute to lung function and potentially COPD pathogenesis independently of smoking history.
  • The identification of novel CpG-sites highlights unique epigenetic factors in non-smokers.