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Research Article Free access | 10.1172/JCI118254

Recombinant ob protein reduces feeding and body weight in the ob/ob mouse.

D S Weigle, T R Bukowski, D C Foster, S Holderman, J M Kramer, G Lasser, C E Lofton-Day, D E Prunkard, C Raymond, and J L Kuijper

Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Department of Medicine, University of Washington School of Medicine, Seattle 98195, USA.

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Published October 1, 1995 - More info

Published in Volume 96, Issue 4 on October 1, 1995
J Clin Invest. 1995;96(4):2065–2070. https://doi.org/10.1172/JCI118254.
© 1995 The American Society for Clinical Investigation
Published October 1, 1995 - Version history
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Abstract

To determine whether the product of the recently cloned ob gene functions as an adipose-related satiety factor, recombinant murine ob protein was administered intraperitoneally to ob/ob mice. Monomeric ob protein given as single morning injections to groups of three animals at seven doses ranging from 5 to 100 micrograms reduced 24-h chow consumption in a dose-dependent manner from values of 81 +/- 6.8% of control (10-micrograms dose, P = 0.04) to 29 +/- 7.7% of control (100-micrograms dose, P < 0.0001). Daily injections of 80 micrograms of ob protein into six ob/ob mice for 2 wk led to an 11 +/- 1.6% decrease in body weight (P = 0.0009) and suppressed feeding to 26 +/- 4.9% of baseline (P < 0.0001), with significant reduction of serum insulin and glucose levels. The effect of recombinant ob protein on feeding was not augmented by cofactors secreted by adipose tissue, nor did exposure of adipose tissue to ob protein affect intracellular ob mRNA levels. Posttranslational modification of ob protein was not required for activity; however, addition of a hexahistidine tag to the amino terminus of the mature ob protein resulted in prolonged suppression of feeding after injection into ob/ob mice. These results demonstrate a direct effect of the ob protein to suppress feeding in the ob/ob mouse and suggest that this molecule plays a critical role in regulating total body fat content.

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