Journal of Lipid Research, Vol 32, 423-429, Copyright © 1991 by Lipid Research, Inc.

ARTICLES

Expression of lipoprotein lipase in different human subcutaneous adipose tissue regions

P Arner, H Lithell, H Wahrenberg and M Bronnegard
Department of Medicine, Huddinge Hospital, Karolinska Institutet, Stockholm, Sweden.

Steady state expression of lipoprotein lipase was compared in abdominal and gluteal subcutaneous adipose tissue of nonobese men and women. In both regions enzyme activity and lipoprotein lipase mRNA levels were significantly higher in women than in men. In men the enzyme activity was higher in abdominal than in gluteal adipose tissue (P less than 0.01) whereas the opposite was observed in women (P less than 0.05). In both sexes, however, lipoprotein lipase mRNA levels were threefold higher in the abdominal as compared to the gluteal site, whether they were determined in isolated fat cells or in fat segments (P less than 0.01). This regional difference persisted when the mRNA values were expressed as a function of the mRNA concentration for beta-actin. There was a correlation between the two adipose tissue regions as regards the values for enzyme activity and mRNA level (r = 0.6-0.8). Northern blot analysis revealed two mRNA species of 3.5 and 3.7 kilobases, respectively. It is concluded that there are regional variations in the steady state expression of lipoprotein lipase in human subcutaneous adipose tissue. This involves site variations in gene expression as well as posttranslational modification of lipoprotein lipase enzyme activity and may contribute to the characteristic variations in adipose tissue mass and distribution between men and women.
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