Original Article
 

Th17/Treg Ratio in COPD Patients with Normal and High Pulmonary Arterial Hypertension

Abstract

The airflow limitation is one of the characteristics of chronic obstructive pulmonary disease (COPD), which is not entirely reversible. It seems that factors such as inflammation, hypoxia, and remodeling of pulmonary vessels can increase pulmonary hypertension (PH). This increase in pulmonary arterial hypertension leads to aggravation of disease complications.
Considering the role of immune cells in causing pathological inflammation in the pathogenesis of COPD, it seems that Th17/Treg axis imbalance can be one of the main reasons for the difference in life expectancy in patients with COPD with and without PH.
By measuring and comparing some inflammatory biomarkers in patients with COPD with and without PH, this study tries to introduce these biomarkers to predict the occurrence or nonoccurrence of this complication. This study aims to compare the ratio and activity of Th17 to Treg in patients with COPD with high (20 patients) and normal (20 patients) pulmonary arterial pressure. Five milliliters of blood containing anticoagulant were obtained to isolate peripheral blood mononuclear cells (PBMCs). Then, the ratio of Th17 to Treg, their number, and their activity were evaluated by ELISA, real-time polymerase chain reaction (PCR), and flow cytometry.
Our results show that the amount of inflammatory factors and the population of Th17 cells in patients with COPD with PH is associated with a significant increase in PH compared to patients with COPD without PH, which leads to damage caused by pathological inflammation to the lung tissue and a decrease in the overall survival of the patients.

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Keywords
Chronic obstructive pulmonary disease Inflammation Pulmonary hypertension Th17 Treg

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How to Cite
1.
Jadidian N, Hazrati A, yazdchi A, Valizadeh H, Taban-Sadeghi MR, Ahmadi M, Mikaeili H. Th17/Treg Ratio in COPD Patients with Normal and High Pulmonary Arterial Hypertension. Iran J Allergy Asthma Immunol. 2026;:1-13.