alexa Combined metformin-sulfonylurea treatment of patients with noninsulin-dependent diabetes in fair to poor glycemic control.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): Reaven GM, Johnston P, Hollenbeck CB, Skowronski R, Zhang JC,

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Abstract The effect of metformin treatment was studied in 13 patients with noninsulin-dependent diabetes mellitus (NIDDM), whose fasting plasma glucose concentration was greater than 10 mmol/L with maximal sulfonylurea doses. Patients were studied before and 3 months after receiving 2.5 g/day metformin. The fasting plasma glucose concentration (12.4 +/- 0.8 vs. 8.8 +/- 0.7 mmol/L), mean hourly postprandial plasma glucose concentration from 0800-1600 h (14.0 +/- 1 vs. 9.4 +/- 0.9 mmol/L), and glycosylated hemoglobin level (12.3 +/- 0.6\% vs. 9.0 +/- 0.6\%) were all significantly (P less than 0.005-0.001) lower after the administration of metformin. The improvement in glycemic control was associated with a 24\% increase (P less than 0.05) in insulin-stimulated glucose uptake during glucose clamp studies and a 16\% decrease in basal hepatic glucose production (P less than 0.05). Mean hourly concentrations of plasma insulin (411 +/- 73 vs. 364 +/- 73 pmol/L) and FFA concentrations (440 +/- 31 vs. 390 +/- 40 mumol/L) were also lower after 3 months of metformin treatment. However, neither insulin binding nor insulin internalization by isolated monocytes changed in response to metformin. Finally, plasma triglyceride, very low density lipoprotein triglyceride, and very low density lipoprotein cholesterol were significantly decreased (P less than 0.01-0.001), and high density lipoprotein cholesterol was significantly increased (P less than 0.001) after metformin treatment. Thus, the addition of metformin to sulfonylurea-treated patients with NIDDM not in good glycemic control significantly lowered fasting and postprandial plasma glucose concentrations, presumably due to the combination of enhanced glucose uptake and decreased hepatic glucose production. Since the dyslipidemia present in these patients also improved, the results suggest that metformin may be of significant clinical utility in patients with NIDDM not well controlled with sulfonylurea compounds. This article was published in J Clin Endocrinol Metab and referenced in Journal of Diabetes & Metabolism

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