Abstract
Protein tyrosine phosphatase 1b is a negative regulator of insulin action and is emerging as a potential drug target for type 2 diabetes mellitus. A novel protein tyrosine phosphatase 1b inhibitor vanadium-flavone complex, bis(5,6,7-trihydroxyflavone)-oxovanadium, was synthesized and characterized by mass spectrometer, inductively coupled plasma, infrared, ultraviolet, electron paramagnetic resonance, X-ray photoelectron spectroscopy and thermal gravity analysis. Bis(5,6,7-trihydroxyflavone)-oxovanadium showed good anti-diabetic effect in streptozocin -induced diabetic mice without gastrointestinal stimulation and induction of hypoglycemia in normoglycemic mice. In vitro, the protein tyrosine phosphatase 1b inhibition activity of bis(5,6,7-trihydroxyflavone)-oxovanadium was enhanced after storage, during which bis(5,6,7-trihydroxyflavone)-oxovanadium could be decomposed gradually and the concentration of VO2+ would gradually increase. In vivo, baicalein not only transports VO2+ to the target organ, but also improves the morphology and function of pancreatic islets via its anti-inflammation activity. Thus bis(5,6,7-trihydroxyflavone)-oxovanadium is a promising potential drug for the treatment of type 2 diabetes mellitus.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (U1607101), Natural Science Foundation of Liaoning Province (2015020199) and the Science and Technology Research Foundation of Education Department of Liaoning Province (201610163L11). We thank Mr. Abdul Rauf and Yan Xing for many helpful suggestions to this manuscript.
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Duan, L., Ye, J., Sun, W. et al. A novel PTP1b inhibitor vanadium-flavone complex: synthesis and pharmacodynamic evaluation in streptozotocin-induced diabetic mice. Med Chem Res 26, 1863–1870 (2017). https://doi.org/10.1007/s00044-017-1895-9
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DOI: https://doi.org/10.1007/s00044-017-1895-9