Methods for studying fibrinolytic pathway components in human plasma.

Area of Science:

• Biochemistry
• Hematology
• Physiology

Background:

• The human fibrinolytic system is essential for dissolving blood clots.
• Quantitative measurement of its components is vital for diagnosing and managing hemostatic disorders.

Purpose of the Study:

• To develop and validate quantitative methods for major plasma components of the human fibrinolytic system.
• To establish normal ranges for key fibrinolytic factors.

Main Methods:

• Functional and immunochemical assays (rocket immunoelectrophoresis) for plasminogen and alpha 2-plasmin inhibitor.
• Spectrophotometric assays with chromogenic substrates for plasminogen activator, protease activities, and plasmin generation rates.

Main Results:

• Normal ranges for plasminogen: 16.7-23.8 mg/dl (functional) and 17.4-21.6 mg/dl (immunochemical).
• Normal range for alpha 2-plasmin inhibitor: 5.30-6.60 mg/dl (both methods).
• Normal plasma showed zero activator and free protease activities; plasmin generation rates were established using urokinase and streptokinase.

Conclusions:

• Validated quantitative assays provide reliable measurements for key fibrinolytic system components.
• Established normal ranges serve as a reference for clinical and research applications.
• The developed methods enable comprehensive assessment of fibrinolytic function.