Abstract
Endothelial cell (EC) activation and inflammation is a key step in the initiation and progression of many cardiovascular diseases. Targeted delivery of therapeutic reagents to inflamed EC using nanoparticles is challenging as nanoparticles do not arrest on EC efficiently under high shear stress. In this study, we developed a novel polymeric platelet-mimicking nanoparticle for strong particle adhesion onto ECs and enhanced particle internalization by ECs. This nanoparticle was encapsulated with dexamethasone as the anti-inflammatory drug, and conjugated with polyethylene glycol, glycoprotein 1b, and trans-activating transcriptional peptide. The multi-ligand nanoparticle showed significantly greater adhesion on P-selectin, von Willebrand Factor, than the unmodified particles, and activated EC in vitro under both static and flow conditions. Treatment of injured rat carotid arteries with these multi-ligand nanoparticles suppressed neointimal stenosis more than unconjugated nanoparticles did. These results indicate that this novel multi-ligand nanoparticle is efficient to target inflamed EC and inhibit inflammation and subsequent stenosis.
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Acknowledgments
The authors would like to acknowledge the assistance provided by members of the Core Imaging Facility at UTSW and the Characterization Center for Materials and Biology at UTA. We also thank Alicia J. Sisemore for her help with the manuscript editing. We acknowledge the financial support from the American Heart Association Scientist Development Award 0735270N (K.N.), NIH grants HL091232 (K.N.) and EB007271 (L.T.).
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Hao Xu and Soujanya Kona equally contributed to this manuscript.
Clinical Relevance
This study was conducted to assess the effect of a novel targeted drug-delivery nanoparticle developed in our laboratories for treatments of complications after transluminal angioplasty and vascular stenting.
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Xu, H., Kona, S., Su, LC. et al. Multi-Ligand Poly(l-Lactic-co-Glycolic Acid) Nanoparticles Inhibit Activation of Endothelial Cells. J. of Cardiovasc. Trans. Res. 6, 570–578 (2013). https://doi.org/10.1007/s12265-013-9460-5
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DOI: https://doi.org/10.1007/s12265-013-9460-5