The DOI matches its Crossref record; 34 of the 34 references it cites were found in a registry or an index.
Increase in Serum Amyloid A Evoked by Dietary Cholesterol Is Associated With Increased Atherosclerosis in Mice
Abstract
Background— Elevated serum amyloid A (SAA) levels are associated with increased cardiovascular risk. SAA levels can be increased by dietary fat and cholesterol. Moreover, SAA can cause lipoproteins to bind extracellular vascular proteoglycans, a process that is critical in atherogenesis. Therefore, we hypothesized that diet-induced increases in SAA would increase atherosclerosis independent of their effect on plasma cholesterol levels. Methods and Results— Female LDL-receptor–null (LDLR −/− ) mice were fed high–saturated fat diets (21%, wt/wt), with or without added cholesterol (0.15%, wt/wt), for 10 weeks. Compared with chow-fed controls, the high-fat diets increased plasma SAA levels. Addition of cholesterol further increased SAA levels 2-fold ( P <0.05) without further increasing plasma cholesterol levels. Addition of dietary cholesterol also increased atherosclerosis ( P <0.05). Four lines of evidence suggest that SAA actually might cause atherosclerosis: (1) SAA levels when mice were euthanized correlated with the extent of atherosclerosis ( r =0.49; P <0.02); (2) SAA levels after 5 weeks of diet correlated with the extent of atherosclerosis at 10 weeks ( r =0.66; P <0.01); (3) binding of HDL from these animals to proteoglycans in vitro was related to the HDL-SAA content ( r =0.65; P <0.01); and (4) immunoreactive SAA was present in lesion areas enriched with both proteoglycans and apolipoprotein A-I, the major HDL apolipoprotein. Conclusions— Addition of cholesterol to a high-fat diet increased plasma SAA levels and atherosclerosis independent of an adverse effect on plasma lipoproteins, consistent with the hypothesis that SAA may promote atherosclerosis directly by mediating retention of SAA-enriched HDL to vascular proteoglycans.
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“Since apoE4 appears to bind better to cell-surface GAG than apoE3 (17), apoE4-containing lipoproteins could be retained more than apoE3-containing lipoproteins by vascular proteoglycans, resulting in oxidative and other potential atherogenic modifications like serum amyloid A-containing HDL (58).”
From Role of the N- and C-Terminal Domains in Binding of Apolipoprotein E Isoforms to Heparan Sulfate and Dermatan Sulfate: A Surface Plasmon Resonance Study (2008) · cites this paper as [58]
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Oxidized phospholipids are proinflammatory and proatherogenic in hypercholesterolaemic mice
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The gut microbiota and its relationship to diet and obesity
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Metadata
- Authors
- Lewis, K. E., Kirk, E. A., McDonald, T. O., Wang, S., Wight, T. N., O’Brien, K. D., & Chait, A.
- Affiliations
- University of Washington (US)
- Venue
- Circulation
- Published
- 2004-08-03
- Volume
- 110
- Issue
- 5
- Pages
- 540-545
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- OpenAlex
- W2052227721
- Cited by
- 163
- References
- 34
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 4 · 2021: 5 · 2020: 5 · 2019: 5 · 2018: 8 · 2017: 6 · 2016: 5 · 2015: 8 · 2014: 6 · 2013: 12 · 2012: 10
- FWCI
- 12.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Circulation (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (DK-035816, ES007033)
- National Heart, Lung, and Blood Institute (P01HL030086, HL030086)
- National Institute of Diabetes and Digestive and Kidney Diseases (DK 035816, P30DK035816)
- National Institute of Environmental Health Sciences (ES007033, P30ES007033)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Cholesterol and Lipid Metabolism
- Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipoproteins and Cardiovascular Health
- Keywords
- serum amyloid A, dietary cholesterol, atherosclerosis, high-fat diet, LDL receptor-null mice, HDL cholesterol, apolipoprotein A-I, atherogenesis, cardiovascular risk
- MeSH terms
- Serum Amyloid P-Component, Serum Amyloid A Protein, Animals, Aorta, Aortic Diseases, Arteriosclerosis, Cholesterol, Cholesterol, Dietary, Diet, Atherogenic, Female, Lipoproteins, HDL, Proteoglycans, Receptors, LDL, Triglycerides, Extracellular Matrix Proteins, Apolipoprotein A-I, Mice, Knockout, Mice, Biglycan
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