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J Agric Food Chem. 2009 Jun 10;57(11):4651-6. doi: 10.1021/jf9008197.

Dietary phloridzin reduces blood glucose levels and reverses Sglt1 expression in the small intestine in streptozotocin-induced diabetic mice.

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  • 1National Food Research Institute, Tsukuba, Ibaraki, Japan.


Phloridzin is a dihydrochalcone typically contained in apples. In this study, it is shown that a diet containing 0.5% phloridzin significantly reduced the blood glucose levels in streptozotocin (STZ)-induced diabetic mice after 14 days. We detected phloridzin in the plasma of STZ-induced diabetic mice fed the phloridzin diet for 14 days, although its concentration was much lower than that of the phloridzin metabolites. A quantitative RT-PCR analysis showed a reversal of STZ induction of the sodium/glucose cotransporter gene Sglt1 and the drug-metabolizing enzyme genes Cyp2b10 and Ephx1 in the small intestine of mice fed a 0.5% phloridzin diet. These mice also showed a reversal of the STZ-mediated renal induction of the glucose-regulated facilitated glucose transporter gene Glut2. Dietary phloridzin improved the abnormal elevations in blood glucose levels and the overexpression of Sglt1, Cyp2b10, and Ephx1 in the small intestine of STZ-induced diabetic mice.

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