title: Management of hyperuricemia with rasburicase review.
abstract: Tumor lysis syndrome (TLS) is a serious complication in patients with hematological malignancies. Massive lysis of tumor cells can lead to hyperuricemia, hyperkalemia, hyperphosphatemia and hypocalcaemia. These metabolic disturbances may result in renal failure, because of precipitation of uric acid crystals and calcium phosphate salts in the kidney. The standard prophylaxis or treatment of hyperuricemia consists of decreasing uric acid production with allopurinol and facilitating its excretion by urinary alkalinization and hyperhydration. By inhibiting the enzyme xanthine oxidase, allopurinol blocks the conversion of hypoxanthine and xanthine into uric acid. An alternative treatment is urate oxidase which oxidates uric acid into allantoin. Allantoin is 5-10 times more soluble than uric acid and is therefore excreted easily. In several clinical trials rasburicase, the recombinant form of urate oxidase, has shown to be very effective in preventing and treating hyperuricemia. Rasburicase, in contrast with the non-recombinant form of urate oxidase uricozyme, is associated with a low incidence of hypersensitivity reactions. In addition to the demonstrated clinical benefit, rasburicase also proved to be a cost-effective option in the management of hyperuricemia.
authors.affiliation: Department of Pediatric Oncology and Hematology, Erasmus MC-Sophia Children's Hospital, Rotterdam, The Netherlands.
authors.forename: J M
authors.initials: JM
authors.lastname: de Bont
authors.forename: R
authors.initials: R
authors.lastname: Pieters
mesh_terms: D000493:Allopurinol / Q000627:therapeutic use; D000963:Antimetabolites / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D003362:Cost-Benefit Analysis; D016166:Free Radical Scavengers / Q000494:pharmacology; D006801:Humans; D033461:Hyperuricemia / Q000188:drug therapy*; D019271:Hypoxanthine / Q000378:metabolism; D013997:Time Factors; D015275:Tumor Lysis Syndrome / Q000517:prevention & control; D014503:Urate Oxidase / Q000378:metabolism / Q000627:therapeutic use*; D014527:Uric Acid / Q000378:metabolism; D014969:Xanthine Oxidase / Q000037:antagonists & inhibitors
chemical_list: D000963:Antimetabolites; D016166:Free Radical Scavengers; C469709:rasburicase; D014527:Uric Acid; D019271:Hypoxanthine; D000493:Allopurinol; D014969:Xanthine Oxidase; D014503:Urate Oxidase