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Related Concept Videos

Coagulation01:06

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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Anticoagulant 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...
Coagulation01:09

Coagulation

The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
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Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
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Disorders of Hemostasis01:24

Disorders 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.
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Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...

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Updated: Jul 21, 2026

The bm12 Inducible Model of Systemic Lupus Erythematosus (SLE) in C57BL/6 Mice
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[Blood coagulation changes in systemic lupus erythematosus].

W L Liu1, H Z Xiu, H Y Sun

  • 1Affiliated Tongji Hospital, Tongji Medical University.

Zhonghua Nei Ke Za Zhi
|December 1, 1990
PubMed
Summary

This study examined blood coagulation changes in 32 patients with systemic lupus erythematosus (SLE). Researchers found that many SLE patients had elevated levels of fibrinogen and fibrin degradation products, suggesting ongoing clotting activity. Von Willebrand factor antigen levels were also increased in some cases. Blood clotting times varied, with some patients showing prolonged or shortened activated partial thromboplastin times. Antithrombin III levels were often low, which may contribute to a procoagulant state. Half of the patients showed signs compatible with disseminated intravascular coagulation (DIC), though only two had acute DIC. Lupus anticoagulants were detected in six patients, and one had deep vein thrombosis. These findings highlight the importance of monitoring coagulation in SLE patients to better manage potential clotting risks.

Keywords:
systemic lupus erythematosus coagulationSLE blood clotting markerslupus anticoagulant detectioncoagulation abnormalities in autoimmune disease

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The bm12 Inducible Model of Systemic Lupus Erythematosus (SLE) in C57BL/6 Mice
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Area of Science:

  • Autoimmune disease pathology
  • Clinical hematology
  • Systemic lupus erythematosus diagnostics

Background:

Systemic lupus erythematosus (SLE) is known to involve multiple organ systems and is associated with immune dysregulation. Prior research has shown that SLE can lead to various hematological complications, including coagulation abnormalities. However, the exact frequency and nature of these coagulation changes remain unclear. Established knowledge indicates that SLE patients may experience thrombotic events, but the mechanisms are not fully understood. No prior work had resolved the specific patterns of coagulation parameters in SLE patients. This gap motivated further investigation into the coagulation profiles of SLE patients. The study aimed to clarify the prevalence of specific coagulation markers in SLE. It was already known that lupus anticoagulants can interfere with clotting tests. Yet, the clinical relevance of these findings had not been fully established.

Purpose Of The Study:

The study aimed to evaluate coagulation changes in patients diagnosed with systemic lupus erythematosus. Researchers focused on identifying patterns of coagulation markers in a sample of 32 SLE patients. The motivation stemmed from the need to better understand the relationship between SLE and coagulation abnormalities. Prior work had suggested a link between SLE and thrombosis, but the specific markers remained unclear. The study sought to determine which coagulation parameters are most frequently altered in SLE. It also aimed to assess whether these changes correlate with clinical outcomes such as deep vein thrombosis. Researchers hypothesized that SLE might be associated with a hypercoagulation state. This investigation was intended to provide insights into the diagnostic and clinical significance of coagulation changes in SLE.

Main Methods:

The study analyzed coagulation parameters in 32 individuals diagnosed with systemic lupus erythematosus. Researchers measured fibrinogen levels, fibrin degradation products (FDP), and von Willebrand factor antigen (VIII:Ag). They also evaluated activated partial thromboplastin time (KPTT) and antithrombin III (AT-III) levels. Blood samples were collected and tested using standard laboratory techniques. The presence of lupus anticoagulants was assessed using appropriate assays. Researchers also examined whether patients met diagnostic criteria for disseminated intravascular coagulation (DIC). Clinical records were reviewed to identify cases of acute DIC or thrombosis. The study used a descriptive approach to report findings rather than infer causation.

Main Results:

Elevated fibrinogen levels were observed in many SLE patients. Fibrin degradation products (FDP) were also frequently elevated. Von Willebrand factor antigen (VIII:Ag) levels were increased in several cases. Prolonged or shortened activated partial thromboplastin time (KPTT) was noted in multiple patients. Antithrombin III (AT-III) levels were often depressed. Half of the patients showed laboratory findings consistent with disseminated intravascular coagulation (DIC). Acute DIC was clinically observed in only two patients. Hypercoagulation states or hypercoagulation with reduced fibrinolysis were frequently detected.

Conclusions:

The findings suggest that coagulation abnormalities are common in systemic lupus erythematosus (SLE) patients. Elevated fibrinogen and FDP levels indicate ongoing clotting activity. Prolonged or shortened KPTT times suggest variable clotting dynamics. Low AT-III levels may contribute to a procoagulant state. Half of the patients showed signs compatible with DIC, though acute cases were rare. Lupus anticoagulants were detected in six patients, and one had deep vein thrombosis. These results highlight the clinical importance of monitoring coagulation in SLE patients. The study supports the need for routine coagulation assessments in SLE management.

Fibrinogen, FDP, and V111R:Ag levels are frequently elevated in SLE patients.

KPTT time is either prolonged or shortened in many SLE patients.

Depressed AT-III levels may contribute to a hypercoagulation state in SLE patients.

Lupus anticoagulants were detected in 6 patients, indicating a potential clotting risk.

Half of the patients showed findings compatible with DIC, though acute cases were rare.

The study suggests routine coagulation assessments are clinically important in SLE.