Correlation between levels of adipokines and inflammatory mediators with spirometric parameters in individuals with obesity and symptoms of asthma: Cross-sectional study

Introduction: The adipose tissue secretes adipokines and influences the release of inflammatory mediators contributing to a state of low-grade systemic inflammation that may change lung function. Objective: To correlate levels of adipokines and inflammatory mediators with lung function in individuals with obesity and bronchial asthma symptoms. Materials and methods: A cross-sectional study, including women with obesity (grade II and III) with symptoms and clinical diagnosis of asthma. Anthropometric measurements (weight, height, BMI), pulmonary function test (spirometry), asthma control test questionnaire, collection of systemic inflammatory markers (blood collection) and pulmonary markers (sputum collection) were collected and were analyzed: IL-6, IL-8, TNF-alpha, adiponectin, resistin, leptin and C-reactive protein (CRP). The patients were stratified into two groups according to asthma control. Results: 80 women were analyzed and 40% had an ACT score greater than or equal to 18 and were classified as controlled asthma. More than half of the patients of ACT < 18 score obtaining measures of FEV1, PEF and FEF25-75% below and 80% of predicted. There was a significant and negative correlation between IL-6 in the sputum with FVC and FEF25-75% in the group ACT < 18 and with FVC and FEV1 in the group ACT >= 18. Conclusions: Therefore, we concluded that the increase of interleukin-6 in the sputum is related to worse pulmonary function even in patients with controlled asthma, especially in the translate airway permeability measures. (C) 2020 Sociedade Portuguesa de Pneumologia. Published by Elsevier Espan tilde a, S.L.U.

Automated summary

This study aimed to investigate the correlation between levels of adipokines and inflammatory mediators and lung function in individuals with obesity and bronchial asthma symptoms. The results showed that an increase in interleukin-6 in the sputum was associated with worse pulmonary function, even in patients with controlled asthma, especially in measures of airway permeability.