Meta-analysis of nicotinamide treatment in patients with recent-onset IDDM. The Nicotinamide Trialists

Diabetes Care
P PozzilliH Kolb

Abstract

Nicotinamide, a vitamin of the B group, has in vitro actions capable of interfering with the pathogenetic process leading to IDDM. Since 1987, several studies have evaluated nicotinamide as a means of protecting beta-cells from end-stage destruction in insulin-treated patients with newly diagnosed IDDM. The aim of the study was to determine whether nicotinamide protects residual beta-cell function when given at IDDM diagnosis. We performed a meta-analysis of the integrated parameters of metabolic control (C-peptide, glycosylated hemoglobin, insulin dose) in 10 randomized (5 of which were placebo) controlled trials conducted in recent-onset IDDM patients for a total of 211 nicotinamide-treated patients. Data on the adverse effects of nicotinamide were also collected from an additional four trials to yield a grand total of 291 nicotinamide-receiving patients. One year after diagnosis, baseline C-peptide was significantly higher in nicotinamide-treated patients, compared with control patients (0.73 +/- 0.65 vs. 0.32 +/- 0.56 ng/ml, P < 0.005). This statistical difference remained also when the five placebo-controlled trials only were considered (P < 0.05). No differences were observed in the insulin dose required or glycosylated h...Continue Reading

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