Reprogramming the rapid clearance of thrombolytics by nanoparticle encapsulation and anchoring to circulating red blood cells.

Journal of Controlled Release : Official Journal of the Controlled Release Society
Mohit Pratap SinghAshish Ranjan

Abstract

Rapid clearance of thrombolytics from blood following intravenous injection is a major clinical challenge in cardiovascular medicine. To overcome this barrier, nanoparticle (NP) based drug delivery systems have been reported. Although superior than conventional therapy, a large proportion of the injected NP is still cleared by the reticuloendothelial system. Previously, we and others showed that ex vivo attachment of bioscavengers, thrombolytics, and nanoparticles (NPs) to glycophorin A receptors on red blood cells (RBCs) improved the blood half-life. This is promising, but ex-vivo approaches are cumbersome and challenging to translate clinically. Here, we developed a novel Ter119-polymeric NP containing tissue plasminogen activator for on-demand targeting of GPA receptors in vivo. Upon intravenous injection, the Ter119-NPs achieved remarkable RBC labeling efficiencies (>95%), resulting in marked enhancement of blood residence time of tPA from minutes to several days without any morphological, hematological, and histological complications. Our approach of RBC labeling with the NPs also prevented reticuloendothelial detections and the activations of innate and adaptive immune system. Data suggest that real-time targeting of ther...Continue Reading

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Citations

Apr 26, 2021·Drug Discovery Today·Lei ZhangZhe-Sheng Chen

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