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Am J Physiol Endocrinol Metab 285: E561-E565, 2003. First published May 28, 2003; doi:10.1152/ajpendo.00042.2003
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Insulin effects on acetate metabolism

H. Piloquet,* V. Ferchaud-Roucher,* F. Duengler, Y. Zair, P. Maugere, and M. Krempf

Centre de Recherche en Nutrition Humaine, Institut National de la Santé et de la Recherche Médicale U539, 44093 Nantes, France

Submitted 30 January 2003 ; accepted in final form 19 May 2003

Acetate metabolism was studied in patients with insulin resistance. To evaluate the interaction between glucose and acetate metabolism, we measured acetate and glucose turnover with a hyperinsulinemic euglycemic clamp (hot clamp) in obese and diabetic patients with insulin resistance (n = 8) and in a control group with normal insulin sensitivity (n = 6). At baseline, acetate turnover and plasma concentrations were similar between the two groups (group means: 4.3 ± 0.4 µmol · kg-1 · min-1 and 128.2 ± 11.1 µmol/l). Acetate concentrations decreased in both groups with hyperinsulinemia but were significantly lower in the insulin-resistant group (20% vs. 12%, P < 0.05). After the hot clamp treatment, acetate turnover increased for the two groups and was higher in the group with normal insulin sensitivity: 8.1 ± 0.7 vs. 5.5 ± 0.5 µmol · kg-1 · min-1 (P < 0.001). No change related to insulin action was observed in either group in the percentage of acetate oxidation. This was {approx}70% of overall utilization at baseline and during the clamp. No correlation between glucose and acetate utilization was observed. Our results support the hypothesis that, like glucose metabolism, acetate metabolism is sensitive to insulin.

stable isotopes; turnover; insulin resistance; hot clamp


Address for reprint requests and other correspondence: M. Krempf, Clinique d'Endocrinologie-Nutrition, Hôtel-Dieu, 44093 Nantes 01, France (E-mail: mkrempf{at}sante.univ-nantes.fr).






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