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
Immune Defense Without Collateral Damage
23.01.2017 | Universität Basel
The interactome of infected neural cells reveals new therapeutic targets for Zika
23.01.2017 | D'Or Institute for Research and Education
For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
23.01.2017 | Health and Medicine
23.01.2017 | Physics and Astronomy
23.01.2017 | Process Engineering