Архивъ внутренней медицины (Jun 2023)

Analysis of Inflammation Biomarkers in Exhaled Breath Condensate in Patients with COPD Combined with Peripheral Arterial Disease

  • S. N. Kotlyarov,
  • I. A. Suchkov,
  • O. M. Uryasev,
  • A. A. Kotlyarova

DOI
https://doi.org/10.20514/2226-6704-2023-13-3-213-223
Journal volume & issue
Vol. 13, no. 3
pp. 213 – 223

Abstract

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Background. Chronic obstructive pulmonary disease (COPD) is one of the most significant diseases due to its high prevalence and impact on prog- nosis. The frequency of exacerbations and comorbidity are important factors influencing the course of COPD. It is believed that local and systemic inflammation may underlie this heterogeneous course of COPD. In this regard, assessment of local inflammation activity in the respiratory tract may be useful to assess the course of COPD. Aim. To study molecular mechanisms of COPD and assess inflammation biomarkers in the exhaled breath condensate (EBC) in patients with COPD with the phenotype of frequent exacerbations combined with peripheral atherosclerosis. Materials and Methods. Bioinformatic analysis of data from Gene Expression Omnibus (GEO) was performed to examine gene ontology of differentially expressed genes in COPD. Proinflammatory cytokines interleukin-1 beta (IL-1β) and tumor necrosis factor alpha (TNFα) in EBC in COPD patients without concomitant atherosclerotic cardiovascular disease (ASCVD) in the stable course phase, in patients with COPD with the phenotype of frequent ex- acerbations and peripheral artery disease (PAD) compared with healthy controls were examined. Results. Differentially expressed genes are involved in biological processes and signaling pathways according to the Kyoto Encyclopedia of Genes and Genomes (KEGG pathway) associated with the immune response that may link the development and progression of COPD and atherosclerosis. Patients with COPD combined with atherosclerosis had higher values of IL-1β and TNFα in EBC compared with controls (p <0.001). COPD patients with frequent exacerbations and PAD had the highest levels of IL-1β and TNFα in EBC compared with patients without ASCVD (p=0.0038 and p=0.0005, respectively). Conclusion. TNFα and IL1-β levels in EBC are elevated in COPD patients with frequent exacerbations and PAD, which may indicate the presence of local inflammation in the airways, the severity of which is associated with the clinical course of COPD.

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