Interleukin-6 and vitamin D serum levels in patients with obstructive sleep apnea syndrome before and after long-term continuous positive airway pressure treatment

Autor: Ourania S Kotsiou, Dimitra I. Siachpazidou, Chaido Pastaka, Eudoxia Gogou, Maria Kechagia, Charalampos Varsamas, Chrissi Hatzoglou, Konstantinos I. Gourgoulianis
Rok vydání: 2020
Předmět:
Popis: Background: Hypoxia induces the production of adipocyte-derived mediators such as IL-6 in obstructive sleep apnea syndrome (OSAS). Low serum 25-hydroxyvitamin D (25(OH)D) levels have been linked to OSAS susceptibility. No data exist to assess whether there has been a correlation between vitamin D and IL-6 serum levels. The effect of CPAP therapy on IL-6 or 25(OH)D levels has yet to be investigated sufficiently in OSAS. We aimed at determining the serum levels of 25(OH)D and IL-6 in OSAS patients compared to non-apneic controls, investigating a possible correlation between 25(OH)D and IL-6 levels and evaluating the changes in IL-6 and 25(OH)D concentrations after twelve months of CPAP therapy in OSAS patients.Methods: 15 OSAS patients diagnosed by polysomnography and 15 non-apneic controls were included in the study. Serum IL-6 and 25(OH)D levels were measured before and after twelve-month CPAP therapy in the whole population and OSAS group, respectively.Results: IL-6 levels were significantly elevated in the OSAS group than the controls. IL-6 levels were positively correlated with OSAS severity, nocturnal hypoxemia, and body mass index (BMI). No difference was detected in 25(OH)D serum levels between groups. We found no correlation between IL-6 and 25(OH)D serum levels in two groups. No effect on IL-6 or 25(OH)D levels was detect after one year of effective CPAP therapy in OSAS patients.Conclusions: IL-6 levels were correlated with OSAS severity, hypoxemia, and BMI. No correlation between 25(OH)D and IL-6 levels and no effect of long-term CPAP on biomarkers were found in OSAS patients.
Databáze: OpenAIRE