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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, RESULTS. Meshes: Animals, Arterial Occlusive Diseases, Biocompatible Materials, Cells, Cultured, Chemokine CCL2, Chemotaxis, Leukocyte, Constriction, Pathologic, Disease Models, Animal, Feasibility Studies, Gene Transfer Techniques, Genetic Therapy, Humans, Iliac Artery, Kinetics, Leukocytes, Mononuclear, Macaca fascicularis, Macrophages, Male, Metals, Mutation, Plasmids, Prosthesis Design, Rabbits, Stents, Time Factors, Tunica Intima, Vascular Surgical Procedures.
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Does local delivery of anti-monocyte chemoattractant protein-1 by gene-eluting stents attenuate in-stent stenosis in rabbits and monkeys? Context: We have previously shown that the intramuscular transfer of the anti-monocyte chemoattractant protein-1 (MCP-1) gene (called 7ND) is able to prevent experimental restenosis. The aim of this study was to determine the in vivo efficacy and safety of local delivery of 7ND gene via the gene-eluting stent in reducing in-stent neointima formation in rabbits and in cynomolgus monkeys. We here found that in vitro, 7ND effectively inhibited the chemotaxis of mononuclear leukocytes and also inhibited the proliferation/migration of vascular smooth muscle cells. We then coated stents with a biocompatible polymer containing a plasmid bearing the 7ND gene, and deployed these stents in the iliac arteries of rabbits and monkeys. 7ND gene-eluting stents attenuated stent-associated monocyte infiltration and neointima formation after one month in rabbits, and showed long-term inhibitory effects on neointima formation when assessments were carried out at 1, 3, and 6 months in monkeys.
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Strategy of inhibiting the action of MCP-1 with a 7ND gene-eluting stent reduced in-stent neointima formation with no evidence of adverse effects in rabbits and monkeys. The 7ND gene-eluting stent could be a promising therapy for treatment of restenosis in humans. Final Decision: yes