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Clearing up inflammation with pro-resolving nanomedicines
Date:3/18/2013

mation-induced damage, which, unlike many other anti-inflammatory strategies, does not compromise host defense and promotes tissue repair," said Ira Tabas, MD, PhD, physician-scientist at Columbia University Medical Center and co-senior author of this study.

"The development of self-assembled targeted nanoparticles which are capable of resolving inflammation has broad application in medicine including the treatment of atherosclerosis," said Omid Farokhzad, MD, physician-scientist at BWH, and a co-senior author of this study.

Polymers consisting of three chains attached end-to-end were developed as building blocks for the engineering of self-assembled targeted nanoparticles; one chain enabled the entrapment and controlled release of the therapeutic payload, in this case a peptide which mimics the pro-resolving properties of the Annexin A1 protein. Another chain conferred stealth properties to the nanoparticles, enabling their long-circulation after systemic administration. Yet a third chain gave homing capability to the nanoparticles to target the collagen IV protein to the vascular wall. As such these nanoparticles are capable of selectively sticking to injured vasculature allowing their therapeutic anti-inflammatory cargo to be released where it is needed to effectively promote inflammation resolution in a deliberate and targeted manner.

"These targeted polymeric nanoparticles are capable of stopping neutrophils, which are the most abundant form of white blood cells, from infiltrating sites of disease or injury at very small doses. This action stops the neutrophils from secreting further signaling molecules which can lead to a constant hyper-inflammatory state and further disease complications," said Nazila Kamaly, PhD, a postdoctoral fellow at BWH and co-lead author of this study.

"Nanoparticles that selectively bind to injured vasculature could have a profound impact in prevalent diseases, such as atherosclerosis, where dam
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Contact: Marjorie Montemayor-Quellenberg
mmontemayor-quellenberg@partners.org
617-534-2208
Brigham and Women's Hospital
Source:Eurekalert  

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