FPA content - a criterion of quality for plasma as factor VIII source

Area of Science:

• Biochemistry
• Hematology
• Clinical Chemistry

Background:

• Fibrinopeptide A (FPA) indicates factor VIII activation.
• Assessing FPA levels is crucial for understanding plasma quality.

Purpose of the Study:

• To determine if blood collection methods influence plasma FPA content.
• To investigate if high FPA levels in fresh frozen plasma affect factor VIII concentrate quality.

Main Methods:

• Surveyed FPA content in normal donor plasma using a modified assay.
• Analyzed the impact of blood collection techniques on FPA levels.
• Evaluated factor VIII concentrates derived from FPA-poor plasma.

Main Results:

• Plasma FPA content is strongly dependent on blood collection quality.
• Improved blood-anticoagulant mixing significantly reduced plasma FPA levels.
• Factor VIII concentrates from FPA-poor plasma exhibited enhanced stability and solubility.

Conclusions:

• Optimized blood collection procedures can minimize FPA generation.
• Reducing FPA in starting plasma improves the quality of factor VIII preparations.
• This finding has implications for manufacturing safer and more effective factor VIII therapies.