Introduction: Chronic obstructive pulmonary disease (COPD) is characterized by the presence of depressive symptoms.
Methods: Cytokine and deiodinase iodothyronines (DIOs) levels were evaluated in COPD patients and patients diagnosed with depressive disorder and control individuals. using enzyme-linked immunosorbent assays.
Results: Interleukin 1β (IL-1β), and tumor necrosis factor-α (TNF-α) levels were higher in COPD and depression patients than in control individuals. DIO2 were significantly lower in COPD and recurrent depressive disorder (rDD) patients than in controls.
Conclusions: Changes in the levels of IL-1β, TNF-α and DIO2 in COPD patients may explain the presence of depression in COPD patients.
Keywords: chronic obstructive pulmonary disease; cytokines; deiodinase iodothyronine; depressive disorder.
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