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  • Title: Comparative study of the effect of sodium fluoride and sodium monofluorophosphate on glucose homeostasis in the rat.
    Author: Rigalli A, Alloatti R, Menoyo I, Puche RC.
    Journal: Arzneimittelforschung; 1995 Mar; 45(3):289-92. PubMed ID: 7741787.
    Abstract:
    The effect of acute and chronic administration of sodium fluoride (NaF) or sodium monofluorophosphate (MFP) on the glucose homeostasis of the rat are compared. The oral administration of a single dose of 40 mumol/100 g b.w. of either compound produced similar increases in plasma glucose (up to 1.8 g/l) and diffusible fluoride (up to 130 mumol/l). In long-term experiments (three months of duration), treatment with NaF (a 5 mmol/l solution as the water supply) produced, in the first month of experiment, abnormal glucose tolerance tests and increased plasma diffusible fluoride levels (range: 2-12 mumol/l). Treatment with MFP, on the other hand, did not affect glucose homeostasis; plasma diffusible fluoride was always below 2 mumol/l. The results of these experiments indicate that glucose homeostasis is affected when plasma diffusible fluoride exceeds 5 mumol/l. The basal and glucose-stimulated insulin secretion of isolated Langerhans rat islets (incubated with solutions containing 2, 5, 10 and 20 mumol/l NaF) was significantly inhibited by 5 to 20 mumol/l fluoride. No effect was observed under similar conditions with MFP at concentrations of 2, 5, 10, 20 and 50 mumol/l.
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