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Factor VIII/von Willebrand factor has potent lectin activity
Biochemical and Biophysical Research Communications
|January 30, 1984
Summary
Highly purified Factor VIII/von Willebrand Factor exhibits significant lectin activity, as demonstrated by haemagglutination assays. This activity is notably inhibited by specific antibodies and certain carbohydrates and amino acids.
Area of Science:
- Biochemistry
- Immunology
- Hematology
Background:
- Factor VIII/von Willebrand Factor (FVIII/vWF) is crucial for hemostasis.
- The molecular functions of FVIII/vWF beyond coagulation are still being investigated.
Purpose of the Study:
- To investigate the potential lectin activity of highly purified FVIII/vWF.
- To characterize the factors influencing this lectin activity.
Main Methods:
- Haemagglutination assays were employed to measure lectin activity.
- Inhibition studies were conducted using monoclonal antibodies, heterologous antibodies, hexosamines, mannose, and net-positively charged amino acids.
Main Results:
- Highly purified plasma and platelet FVIII/von Willebrand Factor demonstrated potent lectin activity in haemagglutination assays.
- This lectin activity was significantly inhibited by specific antibodies targeting FVIII/vWF.
- Hexosamines, mannose, and net-positively charged amino acids also effectively inhibited the observed lectin activity.
Conclusions:
- FVIII/von Willebrand Factor possesses inherent lectin properties.
- These lectin properties can be modulated by specific antibodies and carbohydrate/amino acid interactions.