Effects of VLDL and remnant particles on platelets.
Abstract
There is a considerable body of evidence supporting an association between hypertriglyceridaemia, a hypercoagulable state and atherothrombosis. A disorder of triglyceride metabolism is a key feature of the metabolic syndrome that increases risk of both ischaemic heart disease and type 2 diabetes approximately 3-fold. An increasing prevalence of obesity and metabolic syndrome is likely to contribute markedly to the prevalent ischaemic heart in the foreseeable future, and therefore it is crucial to understand mechanisms linking hypertriglyceridaemia and a hypercoagulable state. Activation of platelets and the coagulation cascade are intertwined. VLDL and remnant lipoprotein concentrations are often increased with the metabolic syndrome. These lipoproteins have the capacity to activate platelets and the coagulation pathway, and to support the assembly of the prothrombinase complex. VLDL also upregulates expression of the plasminogen activator inhibitor-1 gene and plasminogen activator inhibitor-1 antigen and activity, a process accompanied by platelet aggregation and clot formation. The surface membrane of activated platelets also supports the assembly and activity of the prothrombinase complex, resulting in further thrombin generation and amplification of the coagulation cascade. Fibrinolysis is also less efficient when thrombin is generated. Thrombin induces thrombin activatable fibrinolysis inhibitor. Thrombin activatable fibrinolysis inhibitor is a carboxypeptidase that cleaves the carboxylic lysine residues on fibrin, thereby abolishing the critical binding site for tPA-plasminogen decreasing plasmin formation. Thus the evidence is supportive of dysregulated coagulation, and impaired fibrinolysis with a predisposition to atherothrombosis, in conditions such as the metabolic syndrome, in which there are increased concentrations of VLDL and remnant lipoproteins. The purpose of this review is to describe the current evidence supporting a procoagulant state induced by VLDL and remnant lipoproteins. The role of these lipoprotein classes in (1) platelet activation; (2) the intrinsic coagulation cascade, and (3) clot formation and fibrinolysis is discussed.
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In vitro studies have implicated these lipids (and in some experiments lipolysis of triglyceride) in inflammation, expression of adhesion molecules, and promotion of coagulation.
“In vitro studies have implicated these lipids (and in some experiments lipolysis of triglyceride) in inflammation (147), expression of adhesion molecules (148), and promotion of coagulation (149).”
From Evaluation and Treatment of Hypertriglyceridemia: An Endocrine Society Clinical Practice Guideline (2012) · cites this paper as [149]
TRL remnants contribute to a prothrombotic phenotype by promoting platelet activation and aggregation and modulating endothelial and systemic hemostatic responses.
“In addition, TRL remnants contribute to a prothrombotic phenotype within the vascular wall by promoting platelet activation and aggregation, and by modulating both endothelial and systemic hemostatic responses [29–32].”
From Targeting triglycerides for cardiovascular risk reduction (2026) · cites this paper as [31]
Triacylglycerols have been linked to nephropathy through VLDL induction of PAI-1 with upregulated coagulation and intra-renal microthrombi.
“and through VLDL induction of plasminogen activating inhibitor-1 (PAI-1) with upregulated coagulation and intra-renal microthrombi [33].”
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- Authors
- Olufadi, R., & Byrne, C. D.
- Affiliations
- Southampton General Hospital (GB)
- Venue
- Pathophysiology of Haemostasis and Thrombosis
- Publisher
- S. Karger AG
- Published
- 2006
- Volume
- 35
- Issue
- 3-4
- Pages
- 281-291
- ISSN
- 1424-8832 (ISSN-L)
- 1424-8840
- OpenAlex
- W2069898248
- Cited by
- 111
- References
- 34
- Citations by year
- 2026: 5 · 2025: 6 · 2024: 11 · 2023: 12 · 2022: 10 · 2021: 9 · 2020: 7 · 2019: 2 · 2018: 6 · 2017: 3 · 2016: 7 · 2015: 2 · 2014: 3 · 2013: 1 · 2012: 3
- FWCI
- 2.23
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Pathophysiology of Haemostasis and Thrombosis (publishedVersion)
- PubMed (publishedVersion)
- ePrints Soton (University of Southampton) (submittedVersion)
- Topics
- Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
- Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Blood properties and coagulation
- Keywords
- VLDL, remnant lipoproteins, platelet activation, hypertriglyceridemia, metabolic syndrome, hypercoagulability, atherothrombosis, prothrombinase complex, plasminogen activator inhibitor-1, fibrinolysis, thrombin, thrombin-activatable fibrinolysis inhibitor, thrombus formation
- MeSH terms
- Blood Coagulation, Blood Platelets, Cholesterol, Factor V, Fibrinolysis, Humans, Lipoproteins, Models, Biological, Thrombosis, Triglycerides, Cholesterol, VLDL, Signal Transduction, Platelet Activation, Factor Xa, Plasminogen Activator Inhibitor 1
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