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Innovative strategy to facilitate organ repair
Date:4/18/2014

practice.

In a first experiment, the researchers compared two methods for skin closure in a deep wound: traditional sutures, and the application of the aqueous nanoparticle solution with a brush. The latter is easy to use and closes skin rapidly until it heals completely, without inflammation or necrosis. The resulting scar is almost invisible.

In a second experiment, still on rats, the researchers applied this solution to soft-tissue organs such as the liver, lungs or spleen that are difficult to suture because they tear when the needle passes through them. At present, no glue is sufficiently strong as well as harmless for the organism. Confronted with a deep gash in the liver with severe bleeding, the researchers closed the wound by spreading the aqueous nanoparticle solution and pressing the two edges of the wound together. The bleeding stopped. To repair a sectioned liver lobe, the researchers also used nanoparticles: they glued a film coated with nanoparticles onto the wound, and stopped the bleeding. In both situations, organ function was unaffected and the animals survived.

"Gluing a film to stop leakage" is only one example of the possibilities opened up by adhesion brought by nanoparticles. In an entirely different field, the researchers have succeeded in using nanoparticles to attach a biodegradable membrane used for cardiac cell therapy, and to achieve this despite the substantial mechanical constraints due to its beating. They thus showed that it would be possible to attach various medical devices to organs and tissues for therapeutic, repair or mechanical strengthening purposes.

This adhesion method is exceptional because of its potential spectrum of clinical applications. It is simple, easy to use and the nanoparticles employed (silica, iron oxides) can be metabolized by the organism. It can easily be integrated into ongoing research on healing and tissue regeneration and contribute to the development of regenera
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Contact: Didier Letourneur
didier.letourneur@inserm.fr
33-014-025-8600
INSERM (Institut national de la sant et de la recherche mdicale)
Source:Eurekalert  

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