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
'Y' a protein unicorn might matter in glaucoma
23.10.2017 | Georgia Institute of Technology
Microfluidics probe 'cholesterol' of the oil industry
23.10.2017 | Rice University
Salmonellae are dangerous pathogens that enter the body via contaminated food and can cause severe infections. But these bacteria are also known to target...
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
23.10.2017 | Event News
17.10.2017 | Event News
10.10.2017 | Event News
23.10.2017 | Life Sciences
23.10.2017 | Physics and Astronomy
23.10.2017 | Health and Medicine