Nonviral monocyte chemoattractant protein-1 gene transfer improves arteriogenesis after femoral artery occlusion.
Local infusion of recombinant monocyte chemoattractant protein-1 (MCP-1) has been shown to enhance collateral artery formation in rabbit and pig hindlimb models. Owing to clinical disadvantages of protein infusion, a nonviral, liposome-based MCP-1 gene transfer was developed. Collateralization in a porcine hindlimb model served to provide a proof-of-principle for the functional benefit of MCP-1 overexpression. Development of arterial conductance as a measure of functionally relevant collateralization was evaluated in occluded as well as untreated hindlimbs in each animal. At the time of occlusion, MCP-1 and control DNA/DC-30 lipoplexes were transferred to femoral arteries of Goettingen minipigs (two therapeutic MCP-1 groups: 2 and 4 microg and one control group), using the Infiltrator local drug-delivery device. At 2 weeks following occlusion, collateralization was determined as changes in peripheral haemodynamic conductance, peripheral over aortic blood pressure ratio and angiographically visible morphology of the peripheral vessel tree. Nonviral MCP-1 gene transfer significantly improved peripheral conductance (control 11.69+/-2.78%, 2 microg 23.81+/-2.81%, P<0.05 and 4 microg 23.36+/-3.1%, P<0.05; n=12 per group) as well as the ratio of peripheral over aortic blood pressure (control 0.64+/-0.03%, 2 microg 0.75+/-0.02%, P<0.05 and 4 mug 0.75+/-0.02%, P<0.05; n=12 per group) when compared to the untreated controls 2 weeks after occlusion. Thus, it could be demonstrated for the first time that in situ overexpression of MCP-1 following local nonviral gene transfer is a potential approach to improve peripheral collateralization.
Cardion AG, Erkrath, Germany.
A
A
Muhs
M C
MC
Lenter
R W
RW
Seidler
R
R
Zweigerdt
M
M
Kirchengast
R
R
Weser
M
M
Ruediger
Brian
B
Guth
D000818:Animals; D001157:Arterial Occlusive Diseases / Q000378:metabolism / Q000628:therapy*; D018932:Chemokine CCL2 / Q000235:genetics* / Q000378:metabolism; D003097:Collateral Circulation / Q000235:genetics*; D004195:Disease Models, Animal; D005263:Femoral Artery / Q000378:metabolism; D015870:Gene Expression; D015316:Genetic Therapy / Q000379:methods*; D008081:Liposomes; D016491:Peripheral Vascular Diseases / Q000378:metabolism / Q000628:therapy*; D010957:Plasmids; D016133:Polymerase Chain Reaction / Q000379:methods; D013552:Swine; D013556:Swine, Miniature; D014162:Transfection; D019076:Transgenes
D018932:Chemokine CCL2; D008081:Liposomes