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[Antithrombin III. Functional role and methods of determination (review)]
Voprosy Meditsinskoi Khimii
|July 1, 1987
Summary
Antithrombin III (AT III), a key blood coagulation inhibitor, neutralizes thrombin and other serine proteinases. Its activity is significantly enhanced by heparin, forming inactive complexes crucial for regulating blood clotting.
Area of Science:
- Biochemistry
- Hematology
- Molecular Biology
Context:
- Antithrombin III (AT III) is the primary endogenous inhibitor of key coagulation serine proteinases, particularly thrombin.
- AT III regulates blood coagulation by inactivating proteases and inhibiting their synthesis.
- Heparin acts as a critical cofactor, dramatically accelerating the formation of AT III-proteinase complexes.
Purpose:
- To review modern procedures for quantifying Antithrombin III levels in blood plasma.
- To highlight the crucial role of AT III in the blood coagulation cascade.
- To explain the mechanism of AT III activation by heparin.
Summary:
- Antithrombin III (AT III) is the principal inhibitor of thrombin and other serine proteinases involved in blood coagulation.
- AT III's inhibitory function is significantly potentiated by heparin, which acts as a catalyst to accelerate the formation of inactive complexes.
- The review covers contemporary methods for measuring AT III in plasma, underscoring its clinical significance.
Impact:
- Provides an overview of current Antithrombin III measurement techniques for clinical and research settings.
- Emphasizes the critical role of AT III and heparin in maintaining hemostasis.
- Facilitates understanding of anticoagulant mechanisms and diagnostic approaches.