期刊
NEPHROLOGY DIALYSIS TRANSPLANTATION
卷 27, 期 10, 页码 3781-3789出版社
OXFORD UNIV PRESS
DOI: 10.1093/ndt/gfs110
关键词
acute kidney injury; apoptosis; inflammation; ischemia-reperfusion; stem cells
资金
- Department of Medicine at The Ottawa Hospital, University of Ottawa
- Kidney Research Scientist Core Education and National Training (KRESCENT) program
Background. Acute kidney injury (AKI) in humans has few therapeutic options. In experimental models, administration of progenitor cells facilitates recovery from AKI. Human umbilical cord-derived CD133(+) progenitor cells promote endothelial repair in ischemic limb, heart and brain tissue. Methods. We examined the effects of human CD133(+) progenitor cells in bilateral ischemiareperfusion (I/R) kidney injury in non-obese diabetic severe combined immunodeficient mice. CD133(+) cells from human cord blood were injected intravenously at the time of reperfusion and the extent of injury was determined by plasma biochemistry and kidney histology. Results. In mice with I/R, fluorescently labeled CD133(+) cells were detected in blood 2 min after injection but decreased rapidly thereafter with no evidence of homing to the kidneys. In mice subjected to I/R, CD133(+) cells significantly increased plasma urea and Cr at 24 h compared to vehicle- or CD133(-) cell-treated mice. CD133(+) cells exacerbated tubular necrosis and apoptosis, increased plasma tumor necrosis factor- and increased kidney neutrophil infiltration. In contrast, CD133(+) cells did not affect tubular cell proliferation. Administration of CD133(+) cells to FVB/N mice post-I/R also augmented kidney injury. Conclusions. These data indicate that human cord blood-derived CD133(+) cells unexpectedly exacerbate ischemic AKI in mice, possibly through soluble factors. Our study highlights the importance of caution in cell-based therapies for human AKI.
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