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We aimed to investigate levels of interleukin-17 (IL-17) and oxidative stress in the active phase of immunoglobulin A vasculitis (IgAV) and determine whether a relationship exists among IL-17, oxidative stress, and system involvement. Patients diagnosed with IgAV, who were not given non-steroidal anti-inflammatory or steroidal drugs within a month, were enrolled. Blood samples were taken in the active and remission phases of the disease. Malondialdehyde (lipid peroxidation marker), 8-hydroxydeoxyguanosine (DNA oxidation marker), total oxidant status (TOS) and total antioxidant status (TAS) levels for oxidative stress, and IL-17 levels were measured. Forty-four patients aged 1.91–15.41 years were enrolled. IL-17 and TAS levels were significantly higher in the active phase of the disease than in the remission phase. 8-Hydroxydeoxyguanosine levels were higher in patients with gastrointestinal involvement than in patients without involvement in the active phase of the disease. A moderate positive correlation was observed between IL-17 and TAS in both active and remission phases. Our results showed increased DNA oxidation in patients with gastrointestinal involvement in the active phase of IgAV, for the first time. Higher IL-17 and TAS levels in the active phase of the disease and positive correlations of TAS and IL-17 in both active and remission phases suggest that IL-17 and oxidative stress may be related.

Interleukin -17 and oxidative stress in children with immunoglobulin A vasculitis