EPO and acute kidney injury: To further study the localization and roles of MRPC, MRPC/EPO and MRPC/suramin in the treatment of AKI, immunochemistry staining was performed to trace MRPC by staining GFP and analyzing the roles of MRPC, MRPC/EPO and MRPC/suramin after injection in I/R AKI C57BL/6 mice at day 2, 4 and 7 after ischemic injury (Figures 3, 4 and 5).