Featured Research

from universities, journals, and other organizations

Mechanisms of cell orientation in the brain decoded

Date:
July 31, 2013
Source:
Universität Mainz
Summary:
Transmembrane protein NG2 controls the orientation of cell migration toward a wound.

The upper two pictures show NG2-expressing OPC in healthy nerve tissue. In comparison, the lower pictures show the altered morphology and orientation of cells in damaged nerve tissue.
Credit: Ill./©: Dominik Sakry, JGU

Transmembrane protein NG2 controls the orientation of cell migration toward a wound.

When the central nervous system is injured, oligodendrocyte precursor cells (OPC) migrate to the lesion and synthesize new myelin sheaths on demyelinated axons. Scientists at the Institute of Molecular Cell Biology at Johannes Gutenberg University Mainz (JGU) have now discovered that a distinct protein regulates the direction and movement of OPC toward the wound. The transmembrane protein NG2, which is expressed at the surface of OPCs and down-regulated as they mature to myelinating oligodendrocytes, plays an important role in the reaction of OPC to wounding. The results of this study have recently been published in the Journal of Neuroscience.

The myelin sheath functions to electrically isolate axons of many nerve fibers and is synthesized by oligodendrocytes which mature from the OPC. In the case of injury, neural cells send out signaling molecules which attract the OPC. The NG2 protein helps OPCs to react to some of these and move in a directed and orientated fashion. "We were able to prove in cell biological experiments that NG2 orientates OPC toward the lesion and ensures targeted OPC migration toward the wound through the regulation of cell polarity," explained Dr. Fabien Binamé, lead author of the study. Supported by funding of the German Research Foundation (DFG), Dr. Fabien Binamé is currently carrying out his research at the Institute of Molecular Cell Biology headed by Professor Jacqueline Trotter.

"The function and mode of operation of NG2 is not yet fully understood," added co-author Dominik Sakry, who was also involved in the study. "But it looks as if the NG2-associated regulatory mechanism becomes apparent only in cases of injury of the nervous system."

Diseases such as Multiple Sclerosis or brain tumors go hand in hand with damage of nerve tissue. "The results of our study on NG2-mediated basic mechanisms of cell orientation and migration could aid in understanding the repair of damaged demyelinated tissue, or be important for treatment of highly active migratory brain tumors which often express high levels of NG2," said Professor Jacqueline Trotter, head of the JGU Institute of Molecular Cell Biology.


Story Source:

The above story is based on materials provided by Universität Mainz. Note: Materials may be edited for content and length.


Journal Reference:

  1. F. Biname, D. Sakry, L. Dimou, V. Jolivel, J. Trotter. NG2 Regulates Directional Migration of Oligodendrocyte Precursor Cells via Rho GTPases and Polarity Complex Proteins. Journal of Neuroscience, 2013; 33 (26): 10858 DOI: 10.1523/JNEUROSCI.5010-12.2013

Cite This Page:

Universität Mainz. "Mechanisms of cell orientation in the brain decoded." ScienceDaily. ScienceDaily, 31 July 2013. <www.sciencedaily.com/releases/2013/07/130731104138.htm>.
Universität Mainz. (2013, July 31). Mechanisms of cell orientation in the brain decoded. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2013/07/130731104138.htm
Universität Mainz. "Mechanisms of cell orientation in the brain decoded." ScienceDaily. www.sciencedaily.com/releases/2013/07/130731104138.htm (accessed July 22, 2014).

Share This




More Mind & Brain News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Newsy (July 22, 2014) — The new sci-fi thriller "Lucy" is making people question whether we really use all our brainpower. But, as scientists have insisted for years, we do. Video provided by Newsy
Powered by NewsLook.com
Do Obese Women Have 'Food Learning Impairment'?

Do Obese Women Have 'Food Learning Impairment'?

Newsy (July 18, 2014) — Yale researchers tested 135 men and women, and it was only obese women who were deemed to have "impaired associative learning." Video provided by Newsy
Powered by NewsLook.com
Does Mixing Alcohol and Energy Drinks Boost Urge To Drink?

Does Mixing Alcohol and Energy Drinks Boost Urge To Drink?

Newsy (July 18, 2014) — A new study suggests that mixing alcohol with energy drinks makes you want to keep the party going. Video provided by Newsy
Powered by NewsLook.com
Pot Cooking Class Teaches Responsible Eating

Pot Cooking Class Teaches Responsible Eating

AP (July 18, 2014) — Following the nationwide trend of eased restrictions on marijuana use, pot edibles are growing in popularity. One Boston-area cooking class is teaching people how to eat pot responsibly. (July 18) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins