Purpose Of Review: My group previously discovered and characterized the rabbit and human VLDL receptors. For more than 30 years, I have focused on research regarding the functions of VLDL receptors in the fields of lipoprotein metabolism and atherogenesis. In this review, I introduce the roles of VLDL receptors in lipoprotein metabolism under physiological conditions and in atherogenesis under nonphysiological conditions.
Recent Findings: I propose that the VLDL receptor plays key roles in the metabolism of postprandial remnant lipoproteins in concert with lipoprotein lipase (LPL). Furthermore, I propound a new mechanism for macrophage foam cell formation via VLDL receptors by remnant lipoproteins and lipoprotein(a) [Lp(a)] in addition to scavenger receptor pathways.
Summary: The VLDL receptor is a so-called macrophage β-VLDL receptor, which is involved in macrophage foam cell formation by remnant lipoproteins. Furthermore, Lp(a) is a VLDL receptor ligand and is directly taken up through macrophage VLDL receptors for macrophage foam cell formation. Additionally, the roles of VLDL receptors in atherogenesis are canvassed.
Supplementary Video Abstract: http://links.lww.com/COL/A21.
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http://dx.doi.org/10.1097/MOL.0000000000000760 | DOI Listing |
Sci Rep
January 2025
Department of Life and Environmental Sciences, Polytechnic University of Marche, Via Brecce Bianche, 60131, Ancona, Italy.
The Low Density Lipoprotein receptors (LDLRs) gene family includes 15 receptors: very low-density lipoprotein receptor (VLDLR), LDLR, Sorting-related receptor with A-type repeats (SORLA), and 12 LDL receptor-related proteins (LRPs): LRP1, LRP1B, LRP2, LRP3, LRP4, LRP5, LRP6, LRP8, LRP10, LRP11, LRP12, LRP13. Most of these are involved in the transduction of key signals during embryonic development and in the regulation of cholesterol homeostasis. In oviparous animals, the VLDL receptor is also known as VTGR since it facilitates the uptake of vitellogenin in ovary.
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January 2025
Department of Cuisine and Nutrition, School of Tourism and Cuisine, Yangzhou University, Yangzhou, China.
In addition to being linked to an excess of lipid accumulation in the liver, being overweight or obese can also result in disorders of lipid metabolism. There is limited understanding regarding whether different levels of protein intake within an energy-restricted diet affect liver lipid metabolism in overweight and obese rats and whether these effects differ by gender, despite the fact that both high protein intake and calorie restriction can improve intrahepatic lipid. The purpose of this study is to explore the effects and mechanisms of different protein intakes within a calorie-restricted diet on liver lipid metabolism, and to investigate whether these effects exhibit gender differences.
View Article and Find Full Text PDFUnlabelled: Genome- and epigenome-wide association studies have associated variants and methylation status of carnitine palmitoyltransferase 1a (CPT1a) to reductions in very low-density lipoprotein (VLDL) cholesterol and triglyceride levels. We report significant associations between the presence of SNPs and reductions in plasma cholesterol, as well as positive associations between hepatic Cpt1a expression and plasma cholesterol levels across inbred mouse strains. Mechanistic studies show that both wild type and human apolipoprotein B100 (apoB)-transgenic mice with liver-specific deletion of (LKO) display lower circulating apoB levels consistent with reduced LDL-cholesterol (LDL-C) and LDL particle number.
View Article and Find Full Text PDFAngiogenesis
January 2025
Department of Pharmacology & Toxicology, Indiana University School of Medicine, Indianapolis, IN, USA.
Reduction-oxidation factor-1 or apurinic/apyrimidinic endonuclease 1 (Ref-1/APE1) is a crucial redox-sensitive activator of transcription factors such as NF-κB, HIF-1α, STAT-3 and others. It could contribute to key features of ocular neovascularization including inflammation and angiogenesis; these underlie diseases like neovascular age-related macular degeneration (nAMD). We previously revealed a role for Ref-1 in the growth of ocular endothelial cells and in choroidal neovascularization (CNV).
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