Abstract
Background: Chemotherapy with <smlcap>L</smlcap>-asparaginase is associated with hepatotoxicity resulting in organ dysfunction in patients with preexisting liver disorders. This study investigated the protective effect of <smlcap>L</smlcap>-carnitine during chemotherapy in a steatotic rat liver model. Methods: Livers from nonsteatotic and steatotic rats were tested in an isolated liver reperfusion model adding <smlcap>L</smlcap>-asparaginase and <smlcap>L</smlcap>-carnitine to the reperfusate. Portal venous pressure (PVP), hepatic oxygen consumption, aspartate aminotransferase, lactate dehydrogenase, glutamate dehydrogenase and α-glutathione S-transferase levels were assessed. Further histopathological analysis was performed and cytotoxicity was verified in vitro. Results:<smlcap>L</smlcap>-Asparaginase induced toxicity in fatty livers whereas low toxicity was observed in normal livers. <smlcap>L</smlcap>-Carnitine induced a decline in PVP and oxygen consumption, and reduced parenchymal and mitochondrial damage in fatty livers. Cytotoxicity of <smlcap>L</smlcap>-asparaginase was not impaired by the presence of <smlcap>L</smlcap>-carnitine. Conclusions: Our study emphasizes the potential of <smlcap>L</smlcap>-carnitine to reduce <smlcap>L</smlcap>-asparaginase-induced hepatotoxicity in patients with preexisting liver disorders.