Comparison of anticoagulant effects on vein grafts between human TFPI gene transfection and aspirin oral administration.
To develop a more efficient antithrombotic way after coronary artery bypass grafting (CABG), the anticoagulant effects were compared of human tissue factor pathway inhibitor (TFPI) gene transfection and aspirin oral administration (traditional method) on vein grafts. An eukaryotic expression plasmid pCMV-(Kozak) TFPI was prepared. Animal model of carotid artery bypass grafting was constructed. In operation, endothelial cells of vein grafts in TFPI group and empty plasmid control group were transfected with pCMV-(Kozak) TFPI and empty plasmid pCMV respectively, while no transfection was conducted in aspirin control group. After operation, aspirin (2 mg.kg(-1).(-1)) was administered (i.g.) in aspirin control group. Three days later, grafts (n=10) were harvested for RT-PCR, Western blotting and immunohistochemical analyses of exogenous gene expression and for pathological, scanning electron microscopic observation of thrombus. Thirty days later, the patency rates of remnant grafts (n=10) were recorded by vessel Doppler ultrasonography. Human TFPI gene products were detected in gene transferred vein grafts. Three days later, thrombi were found in 7 animals of aspirin control group and in 8 animals of empty plasmid control group, but in only 1 of TFPI group (P<0.01). Thirty days later, 5 grafts were occluded in empty plasmid control group, but none of grafts was occluded in the other groups (P<0.05). The endothelial surfaces of grafts in both of the control groups were covered with aggregated erythrocytes and platelets, and it were not seen in TFPI group. It was suggested that the anticoagulant effects on vein grafts of human TFPI gene transfection are better than those of aspirin.
Feng
Deguang
D
Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
Li
Quan
Q
Zhang
Kailun
K
Jiang
Xionggang
X
Leng
Song
S
Deng
Heping
H
Feng
Jian'e
J
Sun
Tucheng
T
Wu
Long
L
Zhou
Cheng
C
D000284:Administration, Oral; D000818:Animals; D000925:Anticoagulants / Q000378:metabolism*; D001241:Aspirin / Q000008:administration & dosage* / Q000378:metabolism; D001026:Coronary Artery Bypass; D004195:Disease Models, Animal; D006801:Humans; D008074:Lipoproteins / Q000378:metabolism*; D010957:Plasmids / Q000378:metabolism; D011817:Rabbits; D016378:Tissue Transplantation / Q000379:methods*; D014162:Transfection; D018608:Ultrasonography, Doppler / Q000379:methods; D014680:Veins / Q000637:transplantation*; D020246:Venous Thrombosis / Q000378:metabolism
D000925:Anticoagulants; D008074:Lipoproteins; C051928:lipoprotein-associated coagulation inhibitor; D001241:Aspirin