Wound closure and organ repair with nanoparticle solutions
Stopping bleeding, closing wounds, repairing organs—these are everyday challenges in medical and surgical practice. In the journal Angewandte Chemie, French researchers have now introduced a new method that employs gluing by aqueous nanoparticle solutions to effectively control bleeding and repair tissues. In animal tests, their approach proved easy to apply, rapid and efficient even in situations when conventional methods are traumatic or fail.
Sutures and staples are efficient tools for use in surgery and treating wounds. However, the usefulness of these methods can be limited in inaccessible parts of the body or in minimally invasive surgeries. In addition, stitching damages soft tissues such as liver, spleen, kidney, or lung.
A good adhesive could be a useful alternative. The problem is that the adhesion must take place in a wet environment and that the repaired area is immediately put under strain. Previous adhesive technologies have had problems, including insufficient strength, inflammation due to toxic substances, or complicated implementation because a chemical polymerization or cross-linking reaction must be carried out in a controlled manner.
A team headed by Ludwik Leibler at the Laboratoire Matière Molle et Chimie (CNRS/ESPCI Paris Tech) and Didier Letourneur at the Laboratoire Recherche Vasculaire Translationnelle (INSERM/Université Paris Diderot) has now successfully tested a completely novel approach for adhering living tissue: they simply apply droplets of a nanoparticle solution to the wound and press it closed for about a minute.
The principle behind is stunningly simple: the nanoparticles spread out across the surface and bind to the tissue’s molecular network by attracting interactions. Because there are a very large number of nanoparticles present, millions of bonds firmly bind the two surfaces together. No chemical reaction is needed. The researchers used silicon dioxide and iron oxide nanoparticles for their experiments.
In contrast to conventional wound adhesives, this results in no artificial barrier; it produces direct contact between the two edges of the wound. Because the nanoparticles are so small, they do not appreciably impact the wound healing process. Applied to deep skin wounds the method is easily usable and leads to remarkably aesthetic healing. In addition, it is possible to correct the positioning of the tissue edges relative to each other without opening the wound closure.
Aqueous solutions of nanoparticles have been also shown to be able to repair rapidly and efficiently in hemorrhagic conditions liver wounds for which sutures are traumatic and not practical. Either a wound was closed and wound edges were glued by nanoparticles or, in the case of liver resections, bleeding was quickly stopped by gluing a polymer strip using a nanoparticle solution.
In addition, the researchers were able to attach a biodegradable membrane to a beating rat heart. This opens new perspectives: it may be possible to attach medical devices for delivering drugs, supporting damaged tissue, as well as matrices for tissue growth.
About the Author
Dr. Ludwik Leibler is Research Director at Centre National de la Recherche Scientifique (CNRS) and director of Soft Matter and Chemistry laboratory at Ecole Supérieure de Physique et Chimie Industrielle (ESPCI ParisTech) in Paris, France and is working in the area of physics and chemistry of materials. He has received awards from various organizations including American Physical Society, American Chemical Society, French Academy of Sciences, French Chemical Society, and CNRS. He is a Foreign Associate of National Academy of Engineering (USA), of Die Nordrhein-Westfälische Akademie der Wissenschaften und der Künste, and a member of Academia Europaea.
Author: Ludwik Leibler, ESPCI ParisTech (France), http://www.espci.fr/en/directory?recherche=Ludwik%09Leibler&r_en_cours=on&type=recherche&unique_id=CgRcAjAeBDw%3D&lang=en
Title: Organ Repair, Hemostasis, and In Vivo Bonding of Medical Devices by Aqueous Solutions of Nanoparticles
Angewandte Chemie International Edition, Permalink to the article: http://dx.doi.org/10.1002/anie.201401043
Faster detection of pathogens in the lungs
24.06.2016 | Universität Zürich
How yeast cells regulate their fat balance
23.06.2016 | Goethe-Universität Frankfurt am Main
Physicists in Innsbruck have realized the first quantum simulation of lattice gauge theories, building a bridge between high-energy theory and atomic physics. In the journal Nature, Rainer Blatt‘s and Peter Zoller’s research teams describe how they simulated the creation of elementary particle pairs out of the vacuum by using a quantum computer.
Elementary particles are the fundamental buildings blocks of matter, and their properties are described by the Standard Model of particle physics. The...
A year and a half on the outer wall of the International Space Station ISS in altitude of 400 kilometers is a real challenge. Whether a primordial bacterium...
Researchers at Case Western Reserve University have developed a way to swiftly and precisely control electron spins at room temperature.
A physics experiment performed at the National Institute of Standards and Technology (NIST) has enhanced scientists' understanding of how free neutrons decay...
Chemically the same, graphite and diamonds are as physically distinct as two minerals can be, one opaque and soft, the other translucent and hard. What makes...
09.06.2016 | Event News
24.05.2016 | Event News
20.05.2016 | Event News
24.06.2016 | Materials Sciences
24.06.2016 | Physics and Astronomy
24.06.2016 | Physics and Astronomy