Plasma ammonia concentration after L-asparaginase therapy in 27 dogs with high-grade lymphoma or leukemia

Journal of Veterinary Emergency and Critical Care
Abbie L SpeasRowan J Milner

Abstract

To establish the occurrence of increased plasma ammonia concentration after L-asparaginase (L-asp) administration in dogs with high-grade lymphoma or leukemia; to identify risk factors for the development of hyperammonemia after L-asp administration; and to determine occurrence of adverse events related to hyperammonemia. Prospective case controlled study of sequentially enrolled dogs between May 2011 and March 2012. A university veterinary teaching hospital. Twenty-seven dogs with high-grade lymphoma or leukemia. All dogs received L-asp intramuscularly at a median dose of 400 IU/kg. Plasma ammonia concentrations were measured at baseline, 16 hours, and 48 hours after L-asp therapy. Clinicopathological abnormalities were assessed to determine risk factors for the development of hyperammonemia. Adverse events following L-asp were recorded. Median plasma ammonia concentrations at baseline, 16 hours, and 48 hours were 26 μmol/L (44 μg/dL), 98 μmol/L (166.9 μg/dL), and 67 μmol/L (114 μg/dL), respectively. Median plasma ammonia concentrations at 16 and 48 hours after administration were significantly increased compared to baseline. Six dogs had adverse events following L-asp administration. No significant clinical signs were noted t...Continue Reading

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