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  • Title: Response of lipoprotein lipase to calorie intake in streptozotocin-induced diabetic rats.
    Author: Inadera H, Tashiro J, Okubo Y, Ishikawa Y, Shirai K, Saito Y, Yoshida S.
    Journal: Scand J Clin Lab Invest; 1992 Dec; 52(8):797-802. PubMed ID: 1283230.
    Abstract:
    The mechanism regulating lipoprotein lipase (LPL) expression in adipose tissue was examined in rats in the conditions of different calorie intakes with and without streptozotocin-induced (STZ-) diabetes. The LPL activity released from adipose tissue was greater with the higher calorie intake (20 g of normal chow diet per day) than with the lower calorie intake (13 g of normal chow diet per day), and was greater in normal rats than in STZ-diabetic rats. The LPL activity was proportional to the serum insulin level in all conditions. Dot-blot analysis showed that the amount of LPL mRNA in adipose tissue was increased by the higher calorie diet and that the increase was less in the diabetic state. Expression of mRNA was also nearly parallel with the serum insulin level. LPL activity released from the heart was not affected by either the calorie intake or the diabetic state. These results suggest that the mechanisms of LPL expression in adipose tissue and the heart are different, and that LPL expression in adipose tissue was closely dependent on the insulin level.
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