PT  - JOURNAL ARTICLE
AU  - Rao N. V. S. Mamidi
AU  - Filip Cuyckens
AU  - Jie Chen
AU  - Ellen Scheers
AU  - Dennis Kalamaridis
AU  - Ronghui Lin
AU  - Jose Silva
AU  - Sue Sha
AU  - David C. Evans
AU  - Michael F. Kelley
AU  - Damayanthi Devineni
AU  - Mark D. Johnson
AU  - Heng Keang Lim
TI  - Metabolism and Excretion of Canagliflozin in Mice, Rats, Dogs, and Humans
AID  - 10.1124/dmd.113.056440
DP  - 2014 May 01
TA  - Drug Metabolism and Disposition
PG  - 903--916
VI  - 42
IP  - 5
4099  - http://dmd.aspetjournals.org/content/42/5/903.short
4100  - http://dmd.aspetjournals.org/content/42/5/903.full
SO  - Drug Metab Dispos2014 May 01; 42
AB  - Canagliflozin is an oral antihyperglycemic agent used for the treatment of type 2 diabetes mellitus. It blocks the reabsorption of glucose in the proximal renal tubule by inhibiting the sodium-glucose cotransporter 2. This article describes the in vivo biotransformation and disposition of canagliflozin after a single oral dose of [14C]canagliflozin to intact and bile duct-cannulated (BDC) mice and rats and to intact dogs and humans. Fecal excretion was the primary route of elimination of drug-derived radioactivity in both animals and humans. In BDC mice and rats, most radioactivity was excreted in bile. The extent of radioactivity excreted in urine as a percentage of the administered [14C]canagliflozin dose was 1.2%–7.6% in animals and approximately 33% in humans. The primary pathways contributing to the metabolic clearance of canagliflozin were oxidation in animals and direct glucuronidation of canagliflozin in humans. Unchanged canagliflozin was the major component in systemic circulation in all species. In human plasma, two pharmacologically inactive O-glucuronide conjugates of canagliflozin, M5 and M7, represented 19% and 14% of total drug-related exposure and were considered major human metabolites. Plasma concentrations of M5 and M7 in mice and rats from repeated dose safety studies were lower than those in humans given canagliflozin at the maximum recommended dose of 300 mg. However, biliary metabolite profiling in rodents indicated that mouse and rat livers had significant exposure to M5 and M7. Pharmacologic inactivity and high water solubility of M5 and M7 support glucuronidation of canagliflozin as a safe detoxification pathway.