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Effects of oleoyl-estrone with dexfenfluramine, sibutramine or phentermine on overweight rats.

Ferrer-Lorente R, Cabot C, Fernández-López JA, Remesar X, Alemany M

Department of Nutrition and Food Science, Faculty of Biology, University of Barcelona, Av. Diagonal, 645, 08028 Barcelona, Spain.

We studied the combination of oleoyl-estrone with either dexfenfluramine, sibutramine or phentermine in overweight male rats treated for 10 days in order to determine whether they shared a mechanism of action. Oleoyl-estrone, dexfenfluramine and sibutramine decreased body weight and energy (essentially lipids); losses were higher when combined with oleoyl-estrone. Glycemia was maintained except under phentermine; oleoyl-estrone induced decreases in triacylglycerols, cholesterol, insulin and HOMA (homeostasis model assessment). Combination of oleoyl-estrone and sibutramine resulted in the loss of up to 29% body energy in 10 days. Energy expenditure was maintained. The effects of oleoyl-estrone and dexfenfluramine or sibutramine on appetite were substantially additive. All oleoyl-estrone-treated rats showed increased insulin sensitivity. In conclusion, combined treatment of overweight rats with oleoyl-estrone and sibutramine or dexfenfluramine results in a dramatic loss of weight and fat, whilst maintaining circulating energy homoeostasis.

Published 2 May 2005 in Eur J Pharmacol, 513(3): 243-8.
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