Combination of Nicotinamide and Steroid Versus Nicotinamide in Recent-Onset IDDM: The IMDIAB II Study

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Abstract
OBJECTIVE The aim of this study was to compare the effect of nicotinamide (NCT) alone or in combination with a cortisone-like substance, deflazacort (DFL), on the integrated parameters of metabolic control in patients with the recent-onset of insulin-dependent diabetes mellitus (IDDM). RESEARCH DESIGN AND METHODS Thirty-six patients who were diagnosed with diabetes between 5 and 35 years of age entered a randomized, double-blind, 1-year prospective study. Group A (n = 18) received NCT for 1 year (25 mg· kg–1 · day–1) plus DFL for 3 months (0.6 mg · kg–1 · day–1 in the first month, 0.3 mg · kg–1 · day–1 in the other 2 months). Group B (n = 18) received NCT for 1 year (25 mg · kg–1 · day–1) plus placebo forthe first 3 months. All patients were treated with intensified insulin therapy. RESULTS At 3 months after diagnosis, the insulin dose was significantly higher in group A compared with group B (P < 0.03) with similar HbA1 levels. Basal and stimulated C-peptide levels in group A of both adults and children were significantly higher compared with patients of group B (P < 0.05 and P P < 0.05). Finally, insulin requirement did not differ between the two groups. CONCLUSIONS A short-term course of DFL therapy at diagnosis in addition to NCT slightly increases glucagon-stimulated but not basal β-cell function after 1 year.

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