13.07.2015 Views

Guidelines for Complications of Cancer Treatment Vol VIII Part B

Guidelines for Complications of Cancer Treatment Vol VIII Part B

Guidelines for Complications of Cancer Treatment Vol VIII Part B

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Hepatotoxicity <strong>of</strong>Chemotherapeutic AgentsToxic liver injury by chemotherapeutic drugs can cause anyknown pattern <strong>of</strong> injury, including necrosis, steatosis, fibrosis,cholestasis, and vascular injury (1). Liver injury during cancerchemotherapy may not always reflect hepatotoxic anticancer.Other factors responsible <strong>for</strong> liver toxicity includes antibiotics,analgesics, antiemetics, or other medications.Preexisting medical problems, tumor, immunosuppression,hepatitis viruses and other infections, and nutritionaldeficiencies or total parenteral nutrition all may affect a host’ssusceptibility to liver injury. Most hepatotoxic drug reactionsare idiosyncratic, due to immunologic mechanisms orvariations in host metabolic response (2).ALKYLATING AGENTS: These includes mechlorethamine,melphalan, chlorambucil , Cyclophosphamide , Ifosfamide andbusulfan.The liver cytochrome P-450 system convertscyclophosphamide to <strong>for</strong>m, aldophosphamide which inside thecell converts into phosphoramide mustard and acrolein andthese two compounds are highly cytotoxic and represent active<strong>for</strong>ms <strong>of</strong> the drug. In spite <strong>of</strong> its requirement <strong>for</strong> hepatic462

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