Figure 10. SnPP administered at the time of maleate injection mitigates prior FeS/SnPP mediated preconditioning and resistance to ARF.
Either unconditioned (control) mice or FeS+SnPP preconditioned (PC) mice were challenged with maleate. Immediately following maleate injection, the preconditioned mice were either left alone (n,6), or they received a second SnPP dose (n, 10). Eighteen hrs later, AKI severity was assessed. The preconditioned mice showed marked protection against AKI, but the administration of a second dose of SnPP at the time of maleate injection negated a large part of the preconditioning cytoprotective effect. This supports the concept that increased HO-1 activity is mechanistically involved in the emergence of the cytoresistant state.