Increased serum levels of IL-2, IL-4, IL-10, IL-17A, and IFN-γ in IgAN patients before treatment. CBA was used to detect the levels of sera IL-2, IL-4, IL-17A, IL-10, and IFN-γ ((a)–(e), resp.) in IgAN patients and HCs. Data are expressed as mean values of individual samples from two divided experiments. Horizontal lines represent median values of different groups.