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Evidence for a New Pathophysiological Mechanism for Coronary Artery Disease Regression: Hepatic Lipase–Mediated Changes in LDL Density
Open accessAbstract
BACKGROUND: Small, dense LDL particles are associated with coronary artery disease (CAD) and predict angiographic changes in response to lipid-lowering therapy. Intensive lipid-lowering therapy in the Familial Atherosclerosis Treatment Study (FATS) resulted in significant improvement in CAD. This study examines the relationship among LDL density, hepatic lipase (HL), and CAD progression, identifying a new biological mechanism for the favorable effects of lipid-altering therapy. METHODS AND RESULTS: Eighty-eight of the subjects in FATS with documented coronary disease, apolipoprotein B levels >/=125 mg/dL, and family history of CAD were selected for this study. They were randomly assigned to receive lovastatin (40 mg/d) and colestipol (30 g/d), niacin (4 g/d) and colestipol, or conventional therapy with placebo alone or with colestipol in those with elevated LDL cholesterol levels. Plasma hepatic lipase (HL), lipoprotein lipase, and LDL density were measured when subjects were and were not receiving lipid-lowering therapy. LDL buoyancy increased with lovastatin-colestipol therapy (7.7%; P<0.01) and niacin-colestipol therapy (10.3%; P<0.01), whereas HL decreased in both groups (-14% [P<0.01] and -17% [P<0.01] with lovastatin-colestipol and niacin-colestipol, respectively). Changes in LDL buoyancy and HL activity were associated with changes in disease severity (P<0.001). In a multivariate analysis, an increase in LDL buoyancy was most strongly associated with CAD regression, accounting for 37% of the variance of change in coronary stenosis (P<0.01), followed by reduction in apolipoprotein Bl (5% of variance; P<0.05). CONCLUSIONS: These studies support the hypothesis that therapy-associated changes in HL alter LDL density, which favorably influences CAD progression. This is a new and potentially clinically relevant mechanism linking lipid-altering therapy to CAD improvement.
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“Several prospective studies suggest that circulating levels of small, dense LDL particles are better predictors of coronary atherosclerosis, carotid atherosclerosis, and response to therapy than are levels of large, buoyant LDL particles (28,(31)(32)(33).”
From Evaluation and Treatment of Hypertriglyceridemia: An Endocrine Society Clinical Practice Guideline (2012) · cites this paper as [28]
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“Hepatic lipase and cholesterol ester transfer protein contribute to the remodeling processes; whether hepatic lipase or cholesterol ester transfer protein has the predominant effect on the size and density of LDL and HDL particles depends on the triglyceride content of very low-density lipoproteins (VLDL) (27,28).”
From Evaluation and Treatment of Hypertriglyceridemia: An Endocrine Society Clinical Practice Guideline (2012) · cites this paper as [28]
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Metadata
- Authors
- Zambon, A., Hokanson, J. E., Brown, B. G., & Brunzell, J. D.
- Affiliations
- University of Washington (US)
- Venue
- Circulation
- Published
- 1999-04-20
- Volume
- 99
- Issue
- 15
- Pages
- 1959-1964
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- OpenAlex
- W1999551921
- Cited by
- 263
- References
- 54
- Citations by year
- 2022: 3 · 2021: 1 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 3 · 2015: 5 · 2014: 4 · 2013: 8 · 2012: 6
- FWCI
- 22.45
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Circulation (publishedVersion)
- PubMed (publishedVersion)
- Padua Research Archive (University of Padova) (submittedVersion, other-oa)
- Funders
- American Heart Association
- National Institutes of Health (5r01hl019451-14, DK35816, 1r01hl042419-01)
- National Heart, Lung, and Blood Institute (HL-42419, P01HL030086, HL3-0086, HL19451)
- Topics
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipoproteins and Cardiovascular Health
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Cholesterol and Lipid Metabolism
- Keywords
- hepatic lipase, lipid-lowering therapy, lovastatin, nicotinic acid, colestipol, apolipoprotein B, coronary artery stenosis, lipoprotein lipase
- MeSH terms
- Aged, Anticholesteremic Agents, Hypolipidemic Agents, Apolipoproteins B, Centrifugation, Density Gradient, Chemistry, Physical, Colestipol, Combined Modality Therapy, Coronary Artery Disease, Drug Therapy, Combination, Humans, Lipase, Lipids, Lipolysis, Lipoproteins, Cholesterol, LDL, Liver, Lovastatin, Male, Middle Aged, Niacin, Chemical Phenomena
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