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- W4242110507 abstract "Abstract. 15-Deoxyspergualin (DSG) has been reported to be a useful immunosuppressive agent already used to inhibit acute rejection in clinical transplantation. In the present study, the survival of heart allograft in rats after a short course of DSG treatment and the mechanisms underlying DSG-induced heart allograft acceptance were studied, Male LEW rats were used as recipients. Male ACI and Wistar rats were used as donors and third-party donors, respectively. Survival of ACI heart grafts in LEW recipients treated with a short course of DSG starting on day 4 after grafting was markedly prolonged, with a mean survival time of 16.6 ± 5.8 days and 29.8 ± 3.0 days at doses of 2.5 mg/kg per day and 5 mg/kg per day, respectively. On day 20 after grafting, the mechanism of inducing allograft survival after DSG treatment at a dose of 5 mg/kg per day was analyzed by testing the activation of spleen cells or serum in several assay systems. Spleen cells from DSG-treated rats with surviving heart allografts showed almost no proliferative response against donor strain stimulator cells compared with controls. The cytotoxic activity towards donor strain target cells of spleen cells from DSG-treated rats with surviving heart allografts was lower than that of spleen cells from rats with rejected heart allografts. Adding various concentrations of spleen cells or serum from DSG-treated LEW rats with surviving ACI heart allografts to the mixed lymphocyte reaction when responder cells from normal LEW rats were exposed tor irradiated ACI or Wistar (third-party) stimulator cells, revealed strong suppression in a cell-dose-dependent manner and a serum-dose-dependent manner. Moreover, transfer of 2.0 times 108 spleen cells or 2 ml serum from DSG-treated LEW rats with surviving ACI heart allografts to irradiated grafted host did not prolong the survival either of ACI heart grafts or of third-party Wistar heart grafts. These results suggest that proliferative response and cytotoxic activity are decreased and suppressor cells and suppressor humoral factor(s) are induced by treatment with DSG in rats with surviving allografts." @default.
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- W4242110507 date "1992-05-01" @default.
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- W4242110507 title "In vivo and in vitro mechanisms of cardiac allograft acceptance in the rat after short treatment with 15-deoxysperguaIin" @default.
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- W4242110507 doi "https://doi.org/10.1111/j.1432-2277.1992.tb01731.x" @default.
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