Pre-diabetes Clinical Trial
Official title:
Effects of Treatment With Metformin and/or Sitagliptin on Beta-cell Function and Insulin Resistance in Women With Previous Gestational Diabetes
The goal of the present research is to compare the effects of treatment with metformin and sitagliptin, alone or in association, in women with previous gestational diabetes to evaluate the impact of the two drugs on beta-cell function. The study results may contribute to give a rational approach for future investigations.
A randomized, double blinded study, on 45 women with previous gestational diabetes and
impaired glucose tolerance (IGT) or impaired fasting glucose (IFG) to assess the effects of a
4-month treatment with metformin and/or a dipeptidyl peptidase-4 inhibitor (sitagliptin) on
beta-cell function and insulin resistance.
At baseline, all women will have a standardized medical history, physical, and laboratory
examination. Plasma glucose, insulin, pro-insulin, C-peptide, glucagon, adipokines,
pro-inflammatory molecules, and lipid profile will be determined in fasting condition. A 75g
OGTT will be performed after an overnight fasting and sample will be drawn at 15, 30, 60, 90
and 120 minutes for plasma glucose, C-peptide, glucagon and GLP-1 determinations. Women with
IFG or IGT will be recruited and undergo to a hyperglycemic clamp with arginin bolus at the
end of the test. Then the women will be randomized in 3 treatment groups: metformin (850 mg
bid), sitagliptin (100 mg qd)or metformin (850 mg bid) + sitagliptin (100 mg qd). After
4-month treatment, the baseline evaluation will be repeated.
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