Objective: To determine the efficacy of soluble pig tissue factor pathway inhibitor fusion immunoglobulin (TFPI-Ig) in blocking pig to human xenogeneic blood coagulation. Results: To generate pig TFPI-Ig or human TFPI-Ig, expression vector containing cDNA encoding pig TFPIα or human TFPIα combined with human constant Ig heavy chain region was cloned and introduced into CHO cells. After purification of pig TFPI-Ig and human TFPI-Ig, the inhibition of each recombinant protein on pig tissue factor (TF)-mediated blood coagulation was examined in human plasma. Compared to human TFPI-Ig, pig TFPI-Ig inhibited pig TF activity and thrombin generation in human plasma more efficiently at certain concentrations. Conclusions: Pig TFPI-Ig will be be useful as a therapeutic protein to treat pig to human xenogeneic blood coagulation.
- Blood coagulation
- Recombinant protein
- Tissue factor
- Tissue factor pathway inhibitor
ASJC Scopus subject areas