Activation of LXR increases acyl-CoA synthetase activity through direct regulation of ACSL3 in human placental trophoblast cells |
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| Authors: | M Susanne Weedon-Fekjaer Knut Tomas Dalen Karianne Solaas Anne Cathrine Staff Asim K Duttaroy Hilde Irene Nebb |
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| Institution: | *Faculty of Medicine, University of Oslo, Oslo, Norway;†Biotechnology Center of Oslo, University of Oslo, Oslo, Norway;§Departments of Endocrinology, Oslo University Hospital, Oslo, Norway;**Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway |
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| Abstract: | Placental fatty acid transport and metabolism are important for proper growth and development of the feto-placental unit. The nuclear receptors, liver X receptors α and β (LXRα and LXRβ), are key regulators of lipid metabolism in many tissues, but little is known about their role in fatty acid transport and metabolism in placenta. The current study investigates the LXR-mediated regulation of long-chain acyl-CoA synthetase 3 (ACSL3) and its functions in human placental trophoblast cells. We demonstrate that activation of LXR increases ACSL3 expression, acyl-CoA synthetase activity, and fatty acid uptake in human tropholast cells. Silencing of ACSL3 in these cells attenuates the LXR-mediated increase in acyl-CoA synthetase activity. Furthermore, we show that ACSL3 is directly regulated by LXR through a conserved LXR responsive element in the ACSL3 promoter. Our results suggest that LXR plays a regulatory role in fatty acid metabolism by direct regulation of ACSL3 in human placental trophoblast cells. |
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| Keywords: | BeWo cell fatty acid uptake acyl-CoA synthetase |
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