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Journal of Animal Science, Vol 68, Issue 4 1024-1029, Copyright © 1990 by American Society of Animal Science

JOURNAL ARTICLE

Effect of beta-adrenergic agonists on lipolysis and lipogenesis by porcine adipose tissue in vitro

T. A. Peterla and C. G. Scanes
Dept. of Anim. Sci., Rutgers--The State University, New Brunswick, NJ 08903.

The effects of the beta-adrenergic agonists isoproterenol, cimaterol, ractopamine and clenbuterol on lipolysis (release of glycerol and free fatty acids) and lipogenesis (incorporation of 14C into fatty acids from [14C]glucose) was examined in porcine adipose tissue explants in vitro. Lipolysis was stimulated by isoproterenol, cimaterol or ractopamine but not by clenbuterol. Insulin reduced the lipolytic effects of the beta-adrenergic agonists (isoproterenol, cimaterol and ractopamine). Lipogenesis was inhibited by all beta-adrenergic agonists tested (isoproterenol, cimaterol, ractopamine and clenbuterol). The antilipogenic effect of the beta-adrenergic agonists was reduced by the presence of insulin in the incubation. Although effects of the different beta-adrenergic agonists varied, all had some direct effects that could be expected to reduce adipose accretion. Effects of beta-adrenergic agonists in the pig are due in part to direct effects on adipose tissue.


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Am J Physiol Regulatory Integrative Comp Physiol, June 1, 2005; 288(6): R1518 - R1524.
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