Taurine prevents streptozotocin impairment of hormone-stimulated glucose uptake in rat adipocytes

European Journal of Pharmacology
M Alessandra ColivicchiLaura Della Corte

Abstract

Streptozotocin-treated rats were used as models of type 1 diabetes to study the effects of dietary taurine on insulin- and adrenergic-stimulated 2-deoxyglucose uptake by isolated adipocytes. In addition to the well-established impairment of basal and insulin-stimulated 2-deoxyglucose uptakes in adipocytes prepared from streptozotocin-diabetic rats, the alpha-(phenylephrine) and beta-(isoproterenol) adrenergic stimulations of glucose uptake were also abolished. The insulin stimulation of glucose uptake in adipocytes was selectively abolished by the phosphatidylinositol 3-kinase inhibitor wortmannin, whereas that by the adrenergic agonists, phenylephrine and isoproterenol, was inhibited by prazosin and propranolol, respectively. Dietary taurine, 4 weeks before and 4 weeks after streptozotocin administration, prevented the loss of both insulin and adrenergic agonist stimulations of 2-deoxyglucose uptake, without affecting hyperglycaemia. Because insulin and adrenergic activations of glucose transport by adipocytes are coupled to different signalling pathways, it is unlikely that these effects of taurine are related to these disparate postreceptor mechanisms.

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Citations

Aug 6, 2011·Amino Acids·Carina S SolonLicio A Velloso
Mar 16, 2012·Amino Acids·Rosane Aparecida RibeiroEverardo Magalhães Carneiro
Apr 8, 2011·Cellular Physiology and Biochemistry : International Journal of Experimental Cellular Physiology, Biochemistry, and Pharmacology·Fabiana DenipoteLeonardo A M Zornoff
Feb 24, 2009·Canadian Journal of Physiology and Pharmacology·Stephen W SchafferMahmood Mozaffari
Apr 17, 2009·The Journal of Nutritional Biochemistry·Michela JacomelliLisa Giovannelli
Jan 3, 2013·Molecular Nutrition & Food Research·Thiago M BatistaEverardo M Carneiro
Oct 30, 2018·Journal of Cellular Physiology·Myat Theingi SweAnusorn Lungkaphin

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