Abstract
Dapagliflozin is a SGLT2 (Sodium/Glucose cotransporter 2) inhibitor that reduces circulating glucose levels in type 2 diabetic patients by blocking the SGLT2-dependent reabsorption of glucose in the kidney. Dapagliflozin is metabolized by UGT1A9 (UDP Glucuronosyltransferase 1 family, Polypeptidase A9), suppressing its SGLT2 inhibitor activity. However little information is available on whether dapagliflozin acts in the absence of dapagliflozin metabolism. Treatment with 0.5μM dapagliflozin significantly reduced the number of HCT116 cells, which express SGLT2 but not UGT1A9. This was independent of SGLT2 inhibition, as the SGLT2 inhibitor phlorizin had no effect. Dapagliflozin also enhanced Erk phosphorylation but without changing levels of uncleaved and cleaved PPAR and uncleaved caspase-3, suggesting that the cause of the decrease in HCT116 cell number was apoptosis independent cell death. Taken together, these data indicate a new potential role for dapagliflozin as an anticancer reagent in tumor cell populations that do not express UGT1A9.
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