In mice, Dr. Yu Shi, Chen Chen, and Professor Michael Gotthardt of the Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch, Germany, have now abolished the infection by blocking the receptor which is required for virus entry.
"We did not detect a single cardiomyocyte that was infected by the virus. Inflammation of the heart muscle associated with this virus infection did not develop," Dr. Shi said. (Journal of American College of Cardiology, (J Am Coll Cardiol, 2009; 53:1219-1226, doi:10.1016/j.jacc.2008.10.064).*
The receptor used by the Coxsackievirus to infect the heart is the Coxsackie-adenovirus-receptor (CAR). It can be found in the cell membrane of myocardial fibers. Ulrike Lisewski, Dr. Shi, Michael Radke, and Prof. Gotthardt discovered only recently that CAR is necessary for a regular heart beat.
In their current study, the researchers could demonstrate that genetically engineered mice without CAR were protected from cardiac infection caused by the Coxsackievirus. Moreover, the mice did not show any evidence of inflammatory cardiomyopathy. That is why Professor Gotthardt assumes - contrary to previous hypotheses - that the direct effects of the virus infection, and not the autoimmune response, primarily determine the disease process.
This distinction is important in order to develop effective methods for future therapies of viral myocarditis. One therapeutic option could be to use CAR as a drug target and to block this receptor with a pharmacological agent.
"However," Dr. Shi explained, "complete blockage of CAR in mice leads to cardiac arrhythmia." Ultimately, the researchers aim to block the receptor transiently, so that only the virus entry is affected without a permanent effect on the heart beat.
*Cardiac deletion of the Coxsackievirus-adenovirusreceptor abolishes CVB3 infection and prevents myocarditis in vivo
Yu Shi, MD PhD*, Chen Chen, MSc*, Ulrike Lisewski, MSc*, Uta Wrackmeyer, MSc*, Michael Radke, PhD*, Dirk Westermann, MD?, Martina Sauter, DVM?, Carsten Tschöpe, MD?, Wolfgang Poller, MD?, Karin Klingel, MD?, and Michael Gotthardt, MD.*, §*Neuromuscular and Cardiovascular Cell Biology, Max-Delbrück-Center for Molecular Medicine (MDC), 13122 Berlin-Buch, Germany,
§Department of Veterinary and Comparative Anatomy, Pharmacology, and Physiology, Washington State University, Pullman, Washington, 99164 USA.Barbara Bachtler
Barbara Bachtler | idw
Further reports about: > Cardiology > Coxsackie-adenovirus-receptor > Coxsackievirus > Inflammation of the heart muscle > Life-threatening cardiac arrhythmia > MDC > Medicine > Mice > Molecular Target > Myocarditis > Virus > Virus Induced Myocarditis > autoimmune response > inflammation of the cardiac muscle > single cardiomyocyte > virus infection
Microscope measures muscle weakness
16.11.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg
Good preparation is half the digestion
16.11.2018 | Max-Planck-Institut für Stoffwechselforschung
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
09.11.2018 | Event News
06.11.2018 | Event News
23.10.2018 | Event News
16.11.2018 | Health and Medicine
16.11.2018 | Life Sciences
16.11.2018 | Life Sciences