A fibrin-specific thrombolytic nanomedicine approach to acute ischemic stroke

作者：Marsh Jon N; Hu Grace; Scott Michael J; Zhang Huiying; Goette Matthew J; Gaffney Patrick J; Caruthers Shelton D; Wickline Samuel A; Abendschein Dana; Lanza Gregory M^*

来源：Nanomedicine, 2011, 6(4): 605-615.

DOI：10.2217/NNM.11.21

• emergency treatment of stroke
• nanoparticle
• perfluorocarbon
• targeted thrombolysis
• urokinase

To develop a fibrin-specific urokinase nanomedicine thrombolytic agent. Materials & Methods: In vitro fibrin-clot dissolution studies were utilized to develop and characterize simultaneous coupling and loading of anti-fibrin monoclonal antibody and urokinase onto perfluorocarbon nanoparticle (NP) surface. In vivo pharmacokinetics and fibrin-specific targeting of the nanolytic agent was studied in dogs. Results: Simultaneous coupling of up to 40 anti-fibrin antibodies and 400 urokinase enzymes per perfluorocarbon NP produced an effective targeted nanolytic agent with no significant surface protein protein interference. Fibrin clot dissolution was not improved by increasing homing capacity from 10 to 40 antibodies/NP, but increasing enzymatic payload from 100 to 400/NP resulted in maximized lytic effect. Fluorescent microscopy showed that rhodamine-labeled urokinase nanoparticles densely decorated the intraluminal thrombus in canine clots in vivo analogous to the fibrin pattern, while an irrelevant-targeted agent had negligible binding. Conclusion: This agent offers a vascularly constrained, simple to administer, low-dose nanomedicine approach that may present an attractive alternative for treating acute stroke victims.

• 出版日期2011-6