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Am J Physiol Endocrinol Metab 264: E800-E803, 1993;
0193-1849/93 $5.00
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AJP - Endocrinology and Metabolism, Vol 264, Issue 5 E800-E803, Copyright © 1993 by American Physiological Society

ARTICLES

Impaired epidermal growth factor production in genetically obese ob/ob mice

G. Serrero, N. M. Lepak, J. Hayashi and S. P. Goodrich
W. Alton Jones Cell Science Center, Lake Placid, New York 12946.

Epidermal growth factor (EGF) is a potent inhibitor of adipose differentiation in vitro and delays adipose tissue development in vivo. Here we show that in the homozygous male obese mice the level of EGF in the submaxillary gland and plasma is significantly lower than in the glands and plasma of age-matched control littermates. This EGF deficiency in ob/ob mice was observed as early as 5 wk of age when obesity had just become apparent and was also found in adult mice. The level of prepro-EGF mRNA expression in the submaxillary gland was also lower in obese mice than in control littermates. However, the level of kidney prepro-EGF mRNA was the same in mice with both phenotypes, suggesting that the regulation of prepro-EGF mRNA expression is different in both tissues. These results indicate that genetic obesity in mice is accompanied by a decrease in the production of EGF.


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