AJP - Regulatory, Integrative and Comparative Physiology, Vol 271, Issue 1 48-R54, Copyright © 1996 by American Physiological Society

ARTICLES

Effects of the lipase inhibitor orlistat on intake and preference for dietary fat in rats

K. Ackroff and A. Sclafani
Department of Psychology, Brooklyn College, City University of New York 11210, USA.

Orlistat (Ols), a potent inhibitor of pancreatic lipase, was added to the fat source (1 or 4 mg Ols/g fat) of a macronutrient self-selection diet fed to adult female rats. The rats responded to the drug-induced reduction in fat absorption by decreasing their dietary fat intake and increasing their protein and carbohydrate intake in a dose-related manner. Total caloric intake also increased, but body weight gain was inhibited compared with the nondrug control group. When Ols was removed from the diet, nutrient selection, caloric intake, and body weight returned to control levels. In additional short-term experiments (30 min/day), rats developed a preference for a plain fat diet over an Ols-fat diet (4 mg/g fat) and also for a cue flavor paired with plain fat over a flavor paired with Ols-fat. Yet, when not given the choice, the rats consumed nearly as much Ols-fat as plain fat diet. These results indicate that, by reducing fat absorption, Ols reduced the attractiveness of dietary fat, although it did not make the fat diet aversive. In clinical use, lipase inhibitors may be effective in reducing dietary fat intake by reducing both the consumption and absorption of fat.

This article has been cited by other articles:

				T. Kawai and T. Fushiki Importance of lipolysis in oral cavity for orosensory detection of fat Am J Physiol Regulatory Integrative Comp Physiol, August 1, 2003; 285(2): R447 - R454. [Abstract] [Full Text] [PDF]