alexa Inhibition of brain creatine kinase activity after renal ischemia is attenuated by N-acetylcysteine and deferoxamine administration.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Bioequivalence & Bioavailability

Author(s): DiPietro PB, Dias ML, Scaini G, Burigo M, Constantino L,

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Abstract Encephalopathy may accompany acute or chronic renal failure, and the mechanisms responsible for neurological complications in patients with renal failure are poorly known. Considering that creatine kinase (CK) is important for brain energy homeostasis and is inhibited by free radicals, and that oxidative stress is probably involved in the pathogenesis of uremic encephalopathy, we measured CK activity (hippocampus, striatum, cerebellum, cerebral cortex and prefrontal cortex) in brain if rats submitted to renal ischemia and the effect of administration of antioxidants (N-acetylcysteine, NAC and deferoxamine, DFX) on this enzyme. We verified that CK activity was not altered in cerebellum and striatum of rats. CK activity was inhibited in prefrontal cortex and hippocampus of rats 12h after renal ischemia. The treatment with antioxidants prevented such effect. Cerebral cortex was also affected, but in this area CK activity was inhibited 6 and 12h after renal ischemia. Moreover, only NAC or NAC plus DFX were able to prevent the inhibition on the enzyme. Although it is difficult to extrapolate our findings to the human condition, the inhibition of brain CK activity after renal failure may be associated to neuronal loss and may be involved in the pathogenesis of uremic encephalopathy. This article was published in Neurosci Lett and referenced in Journal of Bioequivalence & Bioavailability

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