In their study, published in the June issue of Journal of Biological Chemistry, the scientists have linked the newly discovered protein MG53 to a pathway that repairs human muscle tissue along with the proteins caveolin-3 (Cav3) and dysferlin. Prior to this study, the underlying interactions that inhibited membrane repair in muscle tissue were unknown.
Linking these proteins creates a mechanism that allows damaged membranes to be repaired, which may transform treatment for patients who suffer from severe complications of diseases such as muscular dystrophy, as well as cardiovascular disorders and conditions related to advancing age.
The study was led by Jianjie Ma, PhD, professor of physiology and biophysics at UMDNJ-Robert Wood Johnson Medical School, in collaboration with Professor Hiroshi Takeshima at Kyoto University, Japan.
According to Dr. Ma, human cells are continuously injured and naturally repaired through the life span. For instance, micro tears can occur as muscles contract within the body during normal everyday activities. However, diseases such as diabetes, cardiovascular disorders and muscular dystrophy, and even aging, compromise the method in which the body repairs its own tissues, resulting in severe damage. His research team announced in December 2008 that it had discovered MG53 as a key initiator of membrane repair in damaged tissue, making it the first group to specifically pinpoint a protein responsible for promoting cell repair.
In the new study, the team’s research has revealed that MG53 acts first as the initial sensor of damaged tissue during the repair process. Then, through its interaction with Cav3, MG53 recruits intracellular vesicles to the injury site in the membrane, acting as a trafficking agent in the repair process. The vesicles interact with dysferlin to fuse with the membrane, thereby creating a repair patch and allowing for normal membrane function.
“Dysferlin has previously been linked to muscle repair, but our findings show that it can not complete the process when MG53 is absent,” said Dr. Ma. “The discovery of MG53 as a necessary element in the repair mechanism provides a foundation in which to study the broader implications of how MG53 fits into the next generation of therapeutic treatments for patients with muscle and cardiovascular disease. We are also looking at its potential to prevent damage from ever occurring.”
In advance of its publication in the June issue of the Journal of Biological Chemistry, in which it was designated a paper of the week, the investigation appeared online in May as a featured research study. The research was supported by grants from the National Institutes of Health, the Ministry of Education, Science, Sports and Culture of Japan and the American Heart Association.UMDNJ-ROBERT WOOD JOHNSON MEDICAL SCHOOL
As one of the eight schools of the University of Medicine and Dentistry of New Jersey with 2,500 full-time and volunteer faculty, Robert Wood Johnson Medical School encompasses 22 basic science and clinical departments and hosts centers and institutes including The Cancer Institute of New Jersey, the Child Health Institute of New Jersey, the Center for Advanced Biotechnology and Medicine, the Environmental and Occupational Health Sciences Institute, and the Stem Cell Institute of New Jersey. The medical school maintains educational programs at the undergraduate, graduate and postgraduate levels for more than 1,500 students on its campuses in New Brunswick, Piscataway, and Camden, and provides continuing education courses for health care professionals and community education programs.
Jennifer Forbes | Newswise Science News
Not of Divided Mind
19.01.2017 | Hertie-Institut für klinische Hirnforschung (HIH)
CRISPR meets single-cell sequencing in new screening method
19.01.2017 | CeMM Forschungszentrum für Molekulare Medizin der Österreichischen Akademie der Wissenschaften
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...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
19.01.2017 | Earth Sciences
19.01.2017 | Life Sciences
19.01.2017 | Physics and Astronomy