The Role of Tissue Factor (TF) In the development of Ischemic-reperfusion injury in Organ Transplantation

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(Background.) Tissue factor (TF) is an initiation factor for blood coagulation, and its expression is induced on endothelial cells during inflammatory or immune responses. We designed an antisense oligodeoxynucleotide (AS-1/TF) for rat TF, and studied its effect on hepatic ischemic reperfusion injury(Methods.) AS-1/TF was delivered intravenously to Lewis rats. After 10 hours, hepatic artery and portal vein were partially clamped. Livers were reperfused after 180 minutes and were harvested. TF expression was studied using immunohistochemical staining(Result.) One of 10 rats survived in a 5-day survival rates and TF was strongly stained on endothelial cells in nontrearment group. However, by treatment with AS-1/TF, six of seven survived and TF staining was significantly reduced. Furthermore, we observed that fluoroscein labeled AS-1/TF was absorbed into endothelial cells.(Conclusions.) These results suggest that AS-1/TF can strongly suppress the expression of TF and thereby inhibit ischemic reperfusion injury to the rat liver