Related Experiment Video
Updated: Jul 15, 2026
04:40
Venous Thrombosis Assay in a Mouse Model of Cancer
Published on: January 5, 2024
Hyperhomocysteinemia and venous thrombosis.
1Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK.
Seminars in Hematology
|April 17, 2007
Summary
Elevated homocysteine levels are linked to thrombosis, but vitamin supplementation to lower homocysteine does not reduce the risk of recurrent arterial or venous vascular disease.
Area of Science:
- Cardiovascular Medicine
- Metabolic Disorders
- Hematology
Background:
- Homocysteinuria is associated with arterial and venous thrombosis.
- Mildly elevated homocysteine levels correlate with venous thromboembolism (VTE), stroke, and peripheral vascular disease, particularly in retrospective studies.
- Prospective studies show a weaker association between elevated homocysteine and vascular events.
Purpose of the Study:
- To investigate the impact of vitamin supplementation on reducing elevated homocysteine levels.
- To determine if lowering homocysteine levels affects the recurrence risk of arterial and venous vascular diseases.
Main Methods:
- Review of retrospective and prospective studies on homocysteinuria and vascular disease.
- Analysis of intervention studies involving vitamin supplementation (folic acid, pyridoxine, vitamin B12).
- Evaluation of homocysteine levels and recurrence rates of venous and arterial events post-intervention.
Main Results:
- Vitamin supplementation effectively reduces elevated plasma homocysteine levels.
- Despite significant homocysteine reduction, prospective intervention studies found no impact on the recurrence of venous or arterial disease.
- The association between elevated homocysteine and vascular disease is less robust in prospective analyses.
Conclusions:
- While vitamin therapy can lower homocysteine, it does not appear to mitigate the risk of recurrent vascular events.
- Further research is needed to understand the complex relationship between homocysteine, vascular disease, and effective treatment strategies.
Related Concept Videos
01:30Venous Thrombosis I: Introduction
Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
01:29Venous Thrombosis III: Interprofessional Care
Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
01:20Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies
The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
01:24Disorders of Hemostasis
Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
01:19Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers
Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...