RASBURICASE

'Rasburicase' (brand names: 'Fasturtec' and 'Elitek') is a recombinant urate oxidase enzyme that does not occur in human organism. It is used for the prevention and treatment of tumor lysis syndrome in patients receiving chemotherapy for hematologic cancers such as leukemias and lymphomas.
It catalyses the conversion of uric acid to allantoin. Allantoin is much more soluble than uric acid, so renal excretion is more effective.