1
|
Kayashima Y, Clanton CA, Lewis AM, Sun X, Hiller S, Huynh P, Wilder J, Hagaman J, Li F, Maeda-Smithies N, Harris EN. Reduction of Stabilin-2 Contributes to a Protection Against Atherosclerosis. Front Cardiovasc Med 2022; 9:818662. [PMID: 35360009 PMCID: PMC8963368 DOI: 10.3389/fcvm.2022.818662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 02/16/2022] [Indexed: 01/05/2023] Open
Abstract
We have previously identified a novel atherosclerosis quantitative trait locus (QTL), Arch atherosclerosis 5 (Aath5), on mouse chromosome 10 by three-way QTL analyses between Apoe−/− mice on a DBA/2J, 129S6 and C57BL/6J background. The DBA/2J haplotype at the Aath5 locus was associated with smaller plaque size. One of the candidate genes underlying Aath5 was Stabilin-2 (Stab2), which encodes a clearance receptor for hyaluronan (HA) predominantly expressed in liver sinusoidal endothelial cells (LSECs). However, the role of Stab2 in atherosclerosis is unknown. A congenic line of Apoe−/− mice carrying Aath5 covering the Stab2DBA allele on a background of 129S6 confirmed the small reductions of atherosclerotic plaque development. To further determine whether Stab2 is an underlying gene for Aath5, we generated Stab2−/−Apoe−/− mice on a C57BL/6J background. When fed with a Western diet for 8 weeks, Stab2−/−Apoe−/− males developed approximately 30% smaller plaques than Stab2+/+Apoe−/− mice. HA was accumulated in circulation but not in major organs in the Stab2 deficient mice. STAB2-binding molecules that are involved in atherosclerosis, including acLDL, apoptotic cells, heparin and vWF were not likely the direct cause of the protection in the Stab2−/−Apoe−/− males. These data indicate that reduction of Stab2 is protective against atherosclerotic plaque development, and that Stab2 is a contributing gene underlying Aath5, although its effect is small. To test whether non-synonymous amino acid changes unique to DBA/2J affect the function of STAB2 protein, we made HEK293 cell lines expressing STAB2129 or STAB2DBA proteins, as well as STAB2129 proteins carrying each of five DBA-unique replacements that have been predicted to be deleterious. These mutant cells were capable of internalizing 125I -HA and DiI-acLDL similarly to the control cells. These results indicate that the amino acid changes unique to DBA/2J are not affecting the function of STAB2 protein, and support our previous observation that the reduced transcription of Stab2 in the liver sinusoid as a consequence of the insertion of a viral-derived sequence, intracisternal A particle, is the primary contributor to the athero-protection conferred by the DBA/2J allele.
Collapse
Affiliation(s)
- Yukako Kayashima
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- *Correspondence: Yukako Kayashima
| | - Connor A. Clanton
- Department of Biochemistry, University of Nebraska, Lincoln, NE, United States
| | - Amanda M. Lewis
- Department of Biochemistry, University of Nebraska, Lincoln, NE, United States
| | - Xinghui Sun
- Department of Biochemistry, University of Nebraska, Lincoln, NE, United States
| | - Sylvia Hiller
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Phillip Huynh
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Jennifer Wilder
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - John Hagaman
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Feng Li
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Nobuyo Maeda-Smithies
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Edward N. Harris
- Department of Biochemistry, University of Nebraska, Lincoln, NE, United States
| |
Collapse
|
2
|
Verwilligen RAF, Mulder L, Rodenburg FJ, Van Dijke A, Hoekstra M, Bussmann J, Van Eck M. Stabilin 1 and 2 are important regulators for cellular uptake of apolipoprotein B-containing lipoproteins in zebrafish. Atherosclerosis 2022; 346:18-25. [PMID: 35247629 DOI: 10.1016/j.atherosclerosis.2022.02.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 02/07/2022] [Accepted: 02/16/2022] [Indexed: 01/01/2023]
Abstract
BACKGROUND AND AIMS Scavenger receptors form a superfamily of membrane-bound receptors that bind and internalize different types of ligands, including pro-atherogenic oxidized low-density lipoproteins (oxLDLs). In vitro studies have indicated a role for the liver sinusoidal endothelial cell receptors stabilin 1 (stab1) and 2 (stab2) in oxLDL clearance. In this study, we evaluated the potential role of stab1 and stab2 in lipoprotein uptake in zebrafish, an upcoming model for studying cholesterol metabolism and atherosclerosis. METHODS Lipoproteins were injected in the duct of Cuvier of wild-type (ABTL) or stab1 and stab2 mutant (stab1-/-stab2-/-) zebrafish larvae at 3 days post-fertilization. To examine the effect of stabilin deficiency on lipoprotein and cholesterol metabolism, zebrafish larvae were challenged with a high cholesterol diet (HCD; 4% w/w) for 10 days. RESULTS Lipoprotein injections showed impaired uptake of both LDL and oxLDL into the vessel wall of caudal veins of stab1-/-stab2-/- zebrafish, which was paralleled by redistribution to tissue macrophages. Total body cholesterol levels did not differ between HCD-fed stab1-/-stab2-/- and ABTL zebrafish. However, stab1-/-stab2-/- larvae exhibited 1.4-fold higher mRNA expression levels of ldlra involved in (modified) LDL uptake, whereas the expression levels of scavenger receptors scarb1 and cd36 were significantly decreased. CONCLUSIONS We have shown that stabilins 1 and 2 have an important scavenging function for apolipoprotein B-containing lipoproteins in zebrafish and that combined deficiency of these two proteins strongly upregulates the clearance of lipoproteins by macrophages within the caudal vein. Our current study highlights the use of zebrafish as model to study lipoprotein metabolism and liver sinusoidal endothelial cell function.
Collapse
Affiliation(s)
- Robin A F Verwilligen
- Division BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, the Netherlands.
| | - Lindsay Mulder
- Division BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, the Netherlands
| | | | - Amy Van Dijke
- Division BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, the Netherlands
| | - Menno Hoekstra
- Division BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, the Netherlands
| | - Jeroen Bussmann
- Division BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, the Netherlands
| | - Miranda Van Eck
- Division BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, the Netherlands
| |
Collapse
|