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To evaluate the balance status of interleukin 18 (IL-18) and interleukin 18 binding protein (IL-18BP) in circulation in patients with lupus nephritis (LN) and primary nephrotic syndrome (PNS), plasma levels as well as mRNA expression in peripheral blood mononuclear cells (PBMCs) of IL-18 and IL-18BP were measured by ELISA and RT-PCR respectively. The ratio of IL-18/IL-18BP was also calculated. Both plasma IL-18 and IL-18BP increased significantly in LN patients while only IL-18BP increased in PNS, which resulted in an elevated ratio of IL-18/IL-18BP in LN but not in PNS patients when compared with normal controls. In contrast, increased level of IL-18 mRNA was only detected in LN but not in PNS group, although IL-18BP mRNA expressions in PBMCs in both groups were higher than that in control. The unbalance of IL-18 and IL-18BP might be involved in the pathogenesis of LN, based on which a therapeutic approach is valuable to be developed for LN.
To evaluate the balance status of interleukin 18 (IL-18) and interleukin 18 binding protein (IL-18BP) in circulation with lupus nephritis (LN) and primary nephrotic syndrome (PNS), plasma levels as well as mRNA expression in peripheral Both plasma IL-18 and IL-18BP were significantly increased in (IL-18BP) LN concentrations of IL-18BP increased in PNS, which resulted in an elevated ratio of IL-18 / IL-18BP in LN but not in PNS patients when compared with normal controls. detected in LN but not in PNS group, although IL-18BP mRNA expressions in both groups were higher than that in control. The unbalance of IL-18 and IL-18BP might be involved in the pathogenesis of LN, based on which a therapeutic approach is valuable to be developed for LN