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  • Title: Effects of retinoic acid on lipoprotein lipase activity and mRNA level in vitro and in vivo.
    Author: Oliver JD, Rogers MP.
    Journal: Biochem Pharmacol; 1993 Feb 09; 45(3):579-83. PubMed ID: 8442757.
    Abstract:
    This study was designed to determine whether all-trans retinoic acid altered lipoprotein lipase (LPL) activity and mRNA levels in vitro and tissue LPL mRNA levels in vivo. Incubation of adipocytes or adipose tissue for up to 12 hr with 10(-6) or 10(-5) M all-trans retinoic acid did not decrease LPL activity. There was no change in LPL mRNA levels following 3 hr incubation of adipocytes with all-trans retinoic acid. Feeding all-trans retinoic acid for 4 days led to a significant decrease in adipose tissue LPL activity but no change in heart enzyme activity. Retinoic acid did not alter the increase in heart LPL activity observed with fasting. There were no changes in LPL mRNA levels in adipose tissue, heart or liver. Retinoic acid does not have an acute direct effect on adipose tissue LPL activity. The observed decrease in adipose tissue LPL activity in vivo is not due to alterations in mRNA levels and may be a secondary effect of retinoic acid.
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