Lipoprotein lipase: from gene to obesity
Top Cited Papers
- 1 August 2009
- journal article
- review article
- Published by American Physiological Society in American Journal of Physiology-Endocrinology and Metabolism
- Vol. 297 (2) , E271-E288
- https://doi.org/10.1152/ajpendo.90920.2008
Abstract
Lipoprotein lipase (LPL) is a multifunctional enzyme produced by many tissues, including adipose tissue, cardiac and skeletal muscle, islets, and macrophages. LPL is the rate-limiting enzyme for the hydrolysis of the triglyceride (TG) core of circulating TG-rich lipoproteins, chylomicrons, and very low-density lipoproteins (VLDL). LPL-catalyzed reaction products, fatty acids, and monoacylglycerol are in part taken up by the tissues locally and processed differentially; e.g., they are stored as neutral lipids in adipose tissue, oxidized, or stored in skeletal and cardiac muscle or as cholesteryl ester and TG in macrophages. LPL is regulated at transcriptional, posttranscriptional, and posttranslational levels in a tissue-specific manner. Nutrient states and hormonal levels all have divergent effects on the regulation of LPL, and a variety of proteins that interact with LPL to regulate its tissue-specific activity have also been identified. To examine this divergent regulation further, transgenic and knockout murine models of tissue-specific LPL expression have been developed. Mice with overexpression of LPL in skeletal muscle accumulate TG in muscle, develop insulin resistance, are protected from excessive weight gain, and increase their metabolic rate in the cold. Mice with LPL deletion in skeletal muscle have reduced TG accumulation and increased insulin action on glucose transport in muscle. Ultimately, this leads to increased lipid partitioning to other tissues, insulin resistance, and obesity. Mice with LPL deletion in the heart develop hypertriglyceridemia and cardiac dysfunction. The fact that the heart depends increasingly on glucose implies that free fatty acids are not a sufficient fuel for optimal cardiac function. Overall, LPL is a fascinating enzyme that contributes in a pronounced way to normal lipoprotein metabolism, tissue-specific substrate delivery and utilization, and the many aspects of obesity and other metabolic disorders that relate to energy balance, insulin action, and body weight regulation.Keywords
This publication has 272 references indexed in Scilit:
- Variations in DNA elucidate molecular networks that cause diseaseNature, 2008
- Normal binding of lipoprotein lipase, chylomicrons, and apo-AV to GPIHBP1 containing a G56R amino acid substitutionBiochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids, 2007
- Glycosylphosphatidylinositol-Anchored High-Density Lipoprotein-Binding Protein 1 Plays a Critical Role in the Lipolytic Processing of ChylomicronsCell Metabolism, 2007
- Association of Lipoprotein Lipase Hind III and Ser 447 Ter Polymorphisms With Dyslipidemia in Asian IndiansThe American Journal of Cardiology, 2006
- Induction of LPL gene expression by sterols is mediated by a sterol regulatory element and is independent of the presence of multiple E boxesJournal of Molecular Biology, 2000
- Effect of lipid transfer proteins on lipoprotein lipase induced transformation of VLDL and HDLBiochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1996
- Developmental extinction of liver lipoprotein lipase mRNA expression might be regulated by an NF‐1‐like siteFEBS Letters, 1993
- Changes in particle size of high density lipoproteins during incubation with very low density lipoproteins, cholesteryl ester transfer protein and lipoprotein lipaseBiochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1992
- Homology of Drosophila yolk proteins and the triacylglycerol lipase familyJournal of Molecular Biology, 1988
- Hyperlipidemia in mast cell-deficient W/WV miceBiochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism, 1986