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Anticoagulant Drugs: Low-Molecular-Weight Heparins

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...

Clot Retraction and Fibrinolysis

Clot Retraction and Fibrinolysis

After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.

Coagulation

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.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...

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Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization

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Exploring antithrombin: insights into its physiological features, clinical implications and analytical techniques.

Muhammad Saboor¹, Hassan A Hamali², Abdullah A Mobarki²

¹Department of Medical Laboratory Sciences, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates.

Blood Coagulation & Fibrinolysis : an International Journal in Haemostasis and Thrombosis

|January 5, 2024

Summary

Antithrombin, a key anticoagulant protein, regulates blood clotting and possesses anti-inflammatory, antitumor, and antiviral properties. This review updates on its structure, functions, deficiencies, and detection methods.

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Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay

Published on: September 9, 2012

Area of Science:

Biochemistry
Molecular Biology
Hematology

Background:

Antithrombin is a vital serine protease inhibitor synthesized in the liver, crucial for regulating coagulation.
It comprises 432 amino acids, featuring distinct domains for heparin and serine protease binding.
Antithrombin contributes significantly to plasma anticoagulant activity and offers anti-inflammatory, antitumor, and antiviral benefits.

Approach:

This review synthesizes current knowledge on antithrombin.
It details the protein's structure, including its three functional domains.
The review covers antithrombin's diverse physiological functions and clinical relevance.

Key Points:

Antithrombin deficiency can be inherited (Type I quantitative, Type II qualitative) or acquired.
Acquired deficiencies are more prevalent and linked to various clinical conditions.
Understanding antithrombin's structure-function relationship is vital for diagnosing and managing deficiencies.

Conclusions:

Antithrombin plays a multifaceted role beyond anticoagulation, impacting inflammation, tumor growth, and viral defense.
Accurate detection methods are essential for identifying both inherited and acquired antithrombin deficiencies.
Further research into antithrombin's therapeutic potential is warranted.