Telomere length in circulating leukocytes is associated with lung function and disease

Area of Science:

• Pulmonary Medicine
• Genetics
• Aging Research

Background:

• Premature aging processes are implicated in chronic obstructive pulmonary disease (COPD).
• Telomere length serves as a marker for biological age and cellular senescence.

Purpose of the Study:

• To investigate the association between telomere length (biological age) and COPD and asthma.
• To determine if intrinsic aging processes influence lung function variability in these diseases.

Main Methods:

• A meta-analysis of 14 studies involving over 934 COPD cases and 2834 asthma cases.
• Linear regression analysis adjusted for age, sex, and smoking status to assess telomere length associations.
• Spirometric parameters including FEV1, FVC, and FEV1/FVC were analyzed.

Main Results:

• Negative associations were found between telomere length and both asthma (β= -0.0452, p=0.024) and COPD (β= -0.0982, p=0.001).
• Positive associations were observed between telomere length and lung function parameters: FEV1 (p=1.07×10(-7)), FVC (p=2.07×10(-5)), and FEV1/FVC (p=5.27×10(-3)).
• Effects were stronger in females and more pronounced when using GLI criteria for COPD.

Conclusions:

• Cellular senescence may contribute to the pathogenesis of COPD and asthma.
• Lung function reflects biological aging, particularly due to intrinsic processes exacerbated in lung diseases.
• Telomere length is a potential biomarker for accelerated aging in respiratory conditions.