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Decreased Serum Sirtuin-1 in COPD.

Satoru Yanagisawa1, Andriana I Papaioannou2, Anastasia Papaporfyriou3

  • 1Airway Disease Section, National Heart and Lung Institute, Imperial College London, London, England.

Chest
|May 17, 2017
PubMed
Summary

Serum SIRT1 (s120S) levels are decreased in COPD patients, correlating with disease severity and lung function. This finding suggests s120S may serve as a potential biomarker for COPD characteristics.

Keywords:
COPDbiomarkeremphysemaserumsirtuin-1

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Area of Science:

  • Biochemistry
  • Pulmonology
  • Aging Research

Background:

  • Sirtuin-1 (SIRT1) is an antiaging protein known to decrease in the lungs of COPD patients.
  • While SIRT1 is detectable in serum, its levels in COPD patients remain uncharacterized.

Purpose of the Study:

  • To investigate serum SIRT1 (s120S) levels in patients with Chronic Obstructive Pulmonary Disease (COPD).
  • To determine the correlation between s120S levels and clinical parameters in COPD.

Main Methods:

  • Serum samples from COPD patients and healthy controls were analyzed using Western blot.
  • Quantification of SIRT1 protein band densities, focusing on the 120 kDa form (s120S).
  • Comparison of s120S levels with clinical data including lung function, BMI, emphysema severity, and exacerbation history.

Main Results:

  • Significantly lower s120S levels were observed in COPD patients compared to controls (P = .014).
  • s120S positively correlated with lung function (FEV1/FVC, FEV1 % predicted), BMI, and diffusing capacity (KCO%).
  • Decreased s120S levels were associated with increased emphysema severity and frequent COPD exacerbations.

Conclusions:

  • Serum s120S is decreased in COPD patients.
  • Reduced s120S may reflect intracellular SIRT1 reduction due to oxidative stress in COPD.
  • s120S shows potential as a biomarker for specific COPD disease characteristics.