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
Shark Tagged by NSU’s Guy Harvey Research Institute Is Apparently Enjoying Time in Warm, Tropical Waters
30.03.2015 | Nova Southeastern University
Misuse of Sustainability Concept May Lead to Even More Toxic Chemical Materials
30.03.2015 | Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences
In an experiment at the Department of Energy's SLAC National Accelerator Laboratory, scientists precisely measured the temperature and structure of aluminum as...
The IPH presents a solution at HANNOVER MESSE 2015 to make ship traffic more reliable while decreasing the maintenance costs at the same time. In cooperation with project partners, the research institute from Hannover, Germany, has developed a sensor system which continuously monitors the condition of the marine gearbox, thus preventing breakdowns. Special feature: the monitoring system works wirelessly and energy-autonomously. The required electrical power is generated where it is needed – directly at the sensor.
As well as cars need to be certified regularly (in Germany by the TÜV – Technical Inspection Association), ships need to be inspected – if the powertrain stops...
When an earthquake hits, the faster first responders can get to an impacted area, the more likely infrastructure--and lives--can be saved.
The Atlantic overturning is one of Earth’s most important heat transport systems, pumping warm water northwards and cold water southwards. Also known as the Gulf Stream system, it is responsible for the mild climate in northwestern Europe.
Scientists now found evidence for a slowdown of the overturning – multiple lines of observation suggest that in recent decades, the current system has been...
Because they are regularly subjected to heavy vehicle traffic, emissions, moisture and salt, above- and underground parking garages, as well as bridges, frequently experience large areas of corrosion. Most inspection systems to date have only been capable of inspecting smaller surface areas.
From April 13 to April 17 at the Hannover Messe (hall 2, exhibit booth C16), engineers from the Fraunhofer Institute for Nondestructive Testing IZFP will be...
25.03.2015 | Event News
19.03.2015 | Event News
17.03.2015 | Event News
30.03.2015 | Earth Sciences
30.03.2015 | Materials Sciences
30.03.2015 | Information Technology