The expression of von Willebrand factor, soluble thrombomodulin, and soluble p-selectin during orthotopic liver transplantation
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1Department of Immunology, Tianjin Medical University, and Tianjin Institute of Thrombosis and Hemostasis, Organ Transplantation Center of Tianjin First Central Hospital, Tianjin, China.
Background:
We evaluated von Willebrand factor (vWF), soluble thrombomodulin (sTM), and soluble P-selectin (sP-selectin) levels in ischemia/reperfusion injury during orthotopic liver transplantation (OLT).
Methods:
The vWF, sTM, and sP-selectin were analyzed in 20 patients who underwent liver transplantation. Blood samples were drawn from the radial artery at serial times during surgery. Plasma levels of sTM and sP-selectin were detected by enzyme-linked immunosorbent assay (ELISA). The wWF activity was measured using the immuno-turbidimetric method. Plasma aspartate transaminase (AST) and alanine transaminase (ALT) were assayed by routine clinical chemistry testing.
Results:
Marked elevation levels of plasma AST and ALT were released during the 15 minutes after reperfusion phase, with a peak on the first postoperative day (P < .01). The sTM level remained unchanged from preoperative to anhepatic phase (P > .05). In contrast, a mean 2.5-fold increase of sTM was observed during the 15-minute reperfusion stage compared with the preoperative value (P < .01). The vWF activity only showed significant increase during the 60-minute reperfusion stage compared with the preoperative value (P < .05). No significant increase occurred in sP-seletin levels during the reperfusion phase. Platelet count showed significant decrease during the entire observation period compared with the preoperative value (P < .01).
Conclusion:
The endothelial reperfusion injury after OLT is characterized by increased vWF and sTM but not by sP-selectin in peripheral blood.
