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Journal of Lipid Research, Vol. 15, 200-205, May 1974
Copyright © 1974 by Lipid Research, Inc.

Metabolism of isolated fat cells from various tissue sites in the rat: influence of hemorrhagic hypotension

R. Storck and J. A. Spitzer

Department of Physiology and Biophysics, Hahnemann Medical College, Philadelphia, Pennsylvania 19102

The in vitro lipolytic response to norepinephrine by rat adipocytes from epididymal, subcutaneous, perirenal, mesenteric, and omental tissue sites was studied in control and hypotensive animals. Lipolysis per millimole of triglyceride was found to be three to four times higher in mesenteric and omental fat cells than in adipocytes of the other sites sampled. The high lipolytic activity of mesenteric and omental adipocytes was partly attributable to their smaller cell size; however, lipolysis per cell was also higher. Hemorrhagic hypotension caused a 50-60% decrease in lipolytic activity at four of the five sites studied. Adipocytes of omental origin maintained their lipolytic activity at the prehypotensive level, however, indicating that the metabolic adjustments brought about by hemorrhagic hypotension are not uniform at all adipose tissue sites.

Supplementary key words norepinephrine-induced lipolysis

Submitted on April 17, 1973
Revised on November 27, 1973
Accepted on December 24, 1973

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