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Transplantation of bone marrow mesenchymal stem cells (BM-MSC) or stromal cells from rodents has been identified as a strategy for renal repair in experimental models of acute kidney injury (AKI), a highly life-threatening clinical setting. The therapeutic potential of BM-MSC of human origin has not been reported so far. Here, we investigated whether human BM-MSC treatment could prevent AKI induced by cisplatin and prolong survival in an immunodeficient mouse model. Results showed that human BM-MSC infusion decreased proximal tubular epithelial cell injury and ameliorated the deficit in renal function, resulting in reduced recipient mortality. Infused BM-MSC became localized predominantly in peritubular areas and acted to reduce renal cell apoptosis and to increase proliferation. BM-MSC also induced protection against AKI-related peritubular capillary changes consisting of endothelial cell …