Apelin/APJ signal system and glomerular filtration rate in various variants of bronchial asthma

Abstract

INTRODUCTION. We have previously postulated the similarity of molecular pathogenetic mechanisms in bronchial asthma (BA) and chronic kidney disease (CKD). Understanding these mechanisms in such a comorbidity pathology is of interest to the clinicians. In recent years, the attention of BA pathogenesis researchers has attracted low-investigated adipokine – apelin. On the other hand, apelin is considered as a renoprotective adipokine that can prevent the progression of CKD. THE AIM of the study is to identify the relationship between apelin/APJ signaling system and glomerular filtration rate in different BA variants. PATIENTS AND METHODS. The 12 of practically healthy persons and 36 bronchial asthma patients were examined. Levels of apelin-12, apelin-36, and APJ receptor of apelines on peripheral blood lymphocytes were determined, as well as levels of TNF-α, IL-6 IL-4 by immunoenzyme method according to standard protocol. Glomerular filtration rate (eGFR) by CKD-EPI was calculated. RESULTS. With the help of factor analysis, it was revealed that the glomerular filtration rate in bronchial asthma is associated with the level of apelin-36. A high level of glomerular filtration rate corresponds to a high level of apelin-36. In bronchial asthma, the negative association of pro-inflammatory adipokines TNF-α and IL-6 with the glomerular filtration rate was revealed. On the other hand, the IL-4 was found to be directly related to the glomerular filtration rate according to the factorial analysis. CONCLUSION. The obtained data suggest a possible renoprotective effect of apelin-36 in bronchial asthma.