Abstract

Initial doses of OKT3 are associated with a cytokine-induced acute clinical syndrome (ACS). This study assessed the safety of a recombinant human tumor necrosis factor receptor fusion protein (TNFR:Fc) given to minimize OKT3-ACS symptoms in renal allograft recipients undergoing induction therapy. Sixteen patients were randomized into treatment or control groups. Treated patients received TNFR:Fc 1 hr before OKT3 on days 0 and 3. Patients were monitored after transplant for OKT3-ACS symptoms. Levels of cytokines, serum creatinine, and C-reactive protein were followed. Patients receiving TNFR:Fc had lower OKT3-ACS symptoms as measured by a scoring system. There was a higher incidence of infection in treated patients (10/12) compared to controls (1/4) in the 3 months after transplant, but the etiology of this difference was unclear. There were no significant differences in cytokine profiles. TNFR:Fc is well tolerated by renal transplant patients receiving OKT3 induction therapy and modestly decreases the symptoms associated with OKT3-ACS.

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