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  • Title: Early brief treatment with losartan plus mycophenolate mofetil provides lasting renoprotection in a renal ablation model.
    Author: Fujihara CK, Vieira JM, Sena CR, Ventura BH, Malheiros DM, Zatz R.
    Journal: Am J Nephrol; 2010; 32(2):95-102. PubMed ID: 20551627.
    Abstract:
    BACKGROUND: Inflammatory events antecede established renal injury in rats with 5/6 renal ablation (Nx), as indicated by the beneficial effects of early, uninterrupted treatment with mycophenolate mofetil (MMF). Angiotensin II also exerts a major pathogenic role at this initial phase. We investigated whether losartan (L) or L+MMF treatment, started early, and L+MMF treatment, started late, would exert lasting renoprotection in Nx even after being discontinued. METHODS: Adult male Munich-Wistar rats underwent Nx and were divided into three groups: Nx (untreated), Nx(L) (given L), and Nx(LMMF) (given L and MMF). Protocol 1: treatments began on day 1, and ceased on day 30, after Nx. Protocol 2: L+MMF treatment began on day 30 and ceased on day 60. RESULTS: Protocol 1: on day 30, hypertension, albuminuria and renal injury were strongly attenuated in Groups Nx(L) and Nx(LMMF). On day 120, these abnormalities were still attenuated in group Nx(LMMF). Protocol 2: on day 120, all parameters were similar between this late Nx(LMMF) group and untreated Nx. CONCLUSION: In Nx, temporary suppression of early, transitory hemodynamic/inflammatory phenomena affords relatively durable renoprotection even after treatment discontinuation. This effect is not obtained with similar temporary treatment initiated later in the course of renal disease.
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