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  • Title: Immune reactivity and immunosuppressive intervention in experimental nephritis. II. Effect of TLI on the course of two models of nephritis in the inbred rat.
    Author: Lowry RP, Forbes RD, Carpenter CB, Gurley KE, Merrill JP.
    Journal: J Immunol; 1984 Feb; 132(2):1007-12. PubMed ID: 6228585.
    Abstract:
    Fractionated high-dose (3400 rad) total lymphoid irradiation (TLI) induces a unique and prolonged state of immunologic unresponsiveness. The therapeutic efficacy of TLI in immune glomerular disease was explored in two animal models: the accelerated autologous form of nephrotoxic serum nephritis (AA-NTSN) and autologous immune complex nephritis (AICN). LEW rats with established AA-NTSN, subjected to TLI, manifest decreased levels of circulating antibody to the heterologous (sheep) immunoglobulin G (0.4 +/- 0.2 vs 1.2 +/- 0.3 mg/ml, mean +/- SE respectively, p less than 0.01) early post TLI in association with a reduction in histopathology and albuminuria (6.7 +/- 2.2 vs control 19.6 +/- 5.4 mg/24 hr, mean +/- SE, p less than 0.02). Administration of TLI to rats with established AICN effected significant (p less than 0.001) reduction in albuminuria (162 +/- 30 vs 315 +/- 27), serum creatinine (p less than 0.005), and the incidence of lipemia (p less than 0.01) vs controls. Adoptive transfer studies provided no evidence that the sustained beneficial effect of TLI in AICN was suppressor cell mediated. Thus, the observed therapeutic efficacy of TLI in the treatment of experimental nephritis, shown to be related to a reduction in the level of circulating antibody in AA-NTSN, provides a new model system for study of immunity and immunosuppression in primary glomerular disease.
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