Pretreatment with EPO reduces the injury and dysfunction caused by ischemia/reperfusion in the mouse kidney in vivo

Patel, N.S.A., Sharples, E.J., Cuzzocrea, S., Chatterjee, P.K., Britti, D., Yaqoob, M.M. and Thiemermann, C. (2004) Pretreatment with EPO reduces the injury and dysfunction caused by ischemia/reperfusion in the mouse kidney in vivo Kidney International, 66 (3). pp. 983-989.

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Background Erythropoietin (EPO) is a potent stimulator of erythroid progenitor cells and is known to be up-regulated during states of hypoxia. Here we investigate the effects of renal ischemia/reperfusion (I/R) on the degree of renal dysfunction and injury with recombinant human EPO in mice when given as either a 3-day pretreatment, or upon reperfusion of the kidney. Methods Mice were treated with EPO (1000 IU/kg/day subcutaneously) for 3 days, or treated with EPO (1000 IU/kg subcutaneously) upon reperfusion, and subsequently subjected to bilateral renal artery occlusion (30 minutes) and reperfusion (24 hours). At the end of experiments, the following indicators and markers of renal injury and dysfunction were measured: plasma urea, creatinine, and aspartate aminotransferase (AST), tissue myeloperoxidase (MPO) activity [for polymorphonuclear leukocyte (PMN) infiltration], and tissue malonaldehyde (MDA) levels (for tissue lipid peroxidation). Kidneys were used for histologic evaluation of renal injury. Results EPO was able to significantly attenuate the renal dysfunction and injury associated with I/R, as well as the tissue injury. The increase in renal MPO activity and, hence, the degree of PMN infiltration were also significantly reduced in EPO-treated mice. In addition, lipid peroxidation as a result of renal I/R injury was also attenuated in EPO-treated mice. Conclusion The protection afforded by the pretreatment regime of EPO was greater than that of administering EPO as a single bolus upon reperfusion. We propose that different mechanisms underlie the protective effects seen with EPO when given as either a daily pretreatment or as a single bolus, which need to be further investigated.

Item Type: Journal article
Uncontrolled Keywords: kidney; reperfusion injury; erythropoietin; mouse
Subjects: B000 Health Professions > B100 Anatomy Physiology and Pathology
DOI (a stable link to the resource): 10.1111/j.1523-1755.2004.00847.x
Faculties: Faculty of Science and Engineering > School of Pharmacy and Biomolecular Sciences
Depositing User: editor spbs
Date Deposited: 06 Nov 2007
Last Modified: 05 Jun 2013 10:12

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