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J Clin Lab Anal ; 35(6): e23790, 2021 Jun.
Article in English | MEDLINE | ID: mdl-33942365

ABSTRACT

BACKGROUND: Systemic inflammation has a critical role in the pathogenesis of obstructive sleep apnea (OSA). Interleukin (IL)-35 and IL-37 have been identified as novel immune-modulating cytokines with anti-inflammatory activities in numerous types of inflammatory disease. The present study aimed to examine the serum levels of IL-35 and IL-37 in patients with OSA, and to investigate their associations with the severity of OSA. METHODS: A total of 97 patients, including 67 cases of OSA and 30 age- and gender-matched healthy control subjects, were enrolled in the present study. All subjects were evaluated by overnight polysomnography. Serum IL-35, IL-37, and pro-inflammatory cytokine IL-1ß levels were examined by ELISA. RESULTS: Compared with those in the control subjects, serum IL-35, IL-37, and IL-1ß levels were significantly elevated in patients with mild, moderate, or severe OSA. Furthermore, a severity-dependent increase in serum IL-35 and IL-37 levels was observed in patients with OSA. IL-35 and IL-37 levels were positively correlated with the apnea-hypopnea index (r = 0.742 and 0.578, respectively; both p < 0.001), while they were negatively correlated with the mean oxygen saturation (r = -0.461 and -0.339, respectively; both p < 0.001) and lowest oxyhaemoglobin saturation (r = -0.616 and -0.463, respectively; both p < 0.001) in patients with OSA. In addition, a positive correlation was observed between IL-35 or IL-37 and IL-1ß levels (all p < 0.001). CONCLUSION: The serum levels of IL-35 and IL-37 were significantly increased in patients with OSA and associated with the severity of OSA, implying that IL-35 and IL-37 may have a protective role in OSA by counteracting inflammatory responses.


Subject(s)
Biomarkers/blood , Interleukin-1/blood , Interleukin-1beta/blood , Interleukins/blood , Sleep Apnea, Obstructive/diagnosis , Adult , Body Mass Index , Case-Control Studies , Female , Follow-Up Studies , Humans , Male , Middle Aged , Polysomnography , Prognosis , Sleep Apnea, Obstructive/blood
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