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J Pharmacol Sci ; 108(4): 529-34, 2008 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19098392

RESUMO

Many studies have examined the efficacy of tacrolimus in rats and dogs, but few have reported its evaluation in cynomolgus monkeys. The aim of this study was to clarify the efficacy of tacrolimus in a cynomolgus monkey renal transplant model based on the efficacy of various doses. Monkeys that had undergone renal transplant were treated with a vehicle or 0.5, 1.0, or 2.0 mg/kg of tacrolimus by oral administration. Tacrolimus administration prolonged animal survival in a dose-dependent manner, and the median survival time (MST) was 11, 21, and >90 days for the 0.5, 1.0, and 2.0 mg/kg tacrolimus groups, respectively. The MST of the vehicle group was 6 days. Histopathological analyses of all transplanted kidneys were also performed. Typical pathological findings of acute rejection were observed in both the vehicle and tacrolimus (0.5 and 1.0 mg/kg)-treated groups. Only limited mononuclear cell infiltration and hemorrhage were present in the tacrolimus (2.0 mg/kg)-treated group. In conclusion, 2.0 mg/kg was considered to be a therapeutic dose in this model, and 0.5 or 1.0 mg/kg could be used for a study when efficacy of a new compound is evaluated in a combination therapy with tacrolimus.


Assuntos
Rejeição de Enxerto/prevenção & controle , Imunossupressores/uso terapêutico , Transplante de Rim , Tacrolimo/uso terapêutico , Administração Oral , Animais , Modelos Animais de Doenças , Relação Dose-Resposta a Droga , Sobrevivência de Enxerto/efeitos dos fármacos , Hemorragia/etiologia , Imunossupressores/administração & dosagem , Rim/patologia , Leucócitos Mononucleares/metabolismo , Macaca fascicularis , Masculino , Taxa de Sobrevida , Tacrolimo/administração & dosagem
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