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  • Title: Prospective randomized trial of OKT3- versus horse antithymocyte globulin-based immunosuppressive prophylaxis in heart transplantation.
    Author: Costanzo-Nordin MR, O'Sullivan EJ, Johnson MR, Winters GL, Pifarre R, Radvany R, Zucker MJ, Scanlon PJ, Robinson JA.
    Journal: J Heart Transplant; 1990; 9(3 Pt 2):306-15. PubMed ID: 2113094.
    Abstract:
    To compare monoclonal anti-T3-receptor antibody (OKT3) and horse antithymocyte globulin (HATG) immunoprophylaxis, 23 heart transplant recipients were randomized to OKT3 (N = 12) 5 mg IV x 14 days of HATG (N = 11) 5 mg/kg IV x 10 days and followed up for 216 +/- 137 days receiving triple immunosuppression. Recipient groups were demographically and clinically similar. First rejection occurred later in OKT3 recipients vs HATG recipients (31.7 +/- 18.3 vs 15.1 +/- 2.3 days; p less than 0.01), but the first rejection necessitating intensified immunosuppression occurred at similar times (30.9 +/- 14.6 vs 21.9 +/- 10.2 days; NS). Phenotypic characterization of peripheral blood lymphocytes by flow cytometry revealed that OKT3 and HATG recipients had similar decreases in total T lymphocytes and lymphocyte subpopulations. During the follow-up period rejection rates in the OKT3- and in the HATG-treated patients were 3.4 +/- 2.7 and 5.9 +/- 4.7, respectively (NS). The number of rejection episodes per recipient treated with intensified immunosuppression was 1.4 +/- 1.2 in the OKT3- and 2.0 +/- 3.1 in the HATG-treated patients (NS). Infection rates were 4.9 +/- 5.2 in the OKT3- and 2.7 +/- 1.7 in the HATG-treated patients (NS). The number of infection episodes that necessitated intravenous antimicrobial therapy was 2.7 +/- 2.3 in the OKT3- and 1.6 +/- 1.3 in the HATG-treated recipients (NS). The number and length of hospitalizations were similar in patients given OKT3-based or HATG-based immunoprophylaxis. We conclude that immunosuppressive prophylaxis with OKT3 vs HATG in heart transplant recipients is associated with a slightly lower incidence and severity of rejection and slightly higher infection rates.
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