Featured Research

from universities, journals, and other organizations

Stroke Recovery: 'First Aid' For Brain Cells Comes From Blood

Date:
April 21, 2009
Source:
University Hospital Heidelberg
Summary:
In acute ischemic stroke, the blood supply to the brain is restricted. Initially, brain cells die from lack of oxygen. In addition, ischemia activates harmful inflammatory processes in the affected area of the brain. For the first time, scientists have shown that certain immune cells in the blood inhibit inflammation after a stroke.

In acute ischemic stroke, the blood supply to the brain is restricted. Initially, brain cells die from lack of oxygen. In addition, ischemia activates harmful inflammatory processes in the affected area of the brain. For the first time, scientists at the Neurology Clinic at Heidelberg University Hospital have shown that certain immune cells in the blood inhibit inflammation after a stroke.

Related Articles


These cells are known as regulatory T lymphocytes (Treg). The regulator cytokine Interleukin 10 plays an important role in this protection, perhaps offering a new approach to stroke therapy.

Every year, some 200,000 people suffer a stroke in Germany. It is still frequently fatal or causes severe disability. The Neurology Clinic in Heidelberg under the direction of its medical director Professor Dr. Werner Hacke works to develop and test innovative approaches to stroke treatment.

Immune cells produce the protective Interleukin 10

The team of researchers headed by Dr. Roland Veltkamp, senior physician at the Neurology Clinic of Heidelberg University Hospital has now shown in stroke models that a stroke in mice with no functioning Treg cells in their blood causes much greater damage to the brain and greater disabilities than in animals with functioning Treg cells. An analysis of the immune system showed that mice without this cellular “First Aid” produce much more inflammatory transmitters in the brain and blood. In addition, immune cells, whose task is to recognize and digest foreign bodies or dead cell material – e.g. microglial cells or neutrophils – are activated more strongly in the absence of Treg.

Treg cells protect cells by suppressing the harmful activation of the immune system and can thus also prevent autoimmune diseases from developing. It is still unclear how exactly the Treg cells communicate in the damaged brain tissue. Interleukin 10 (IL 10), a transmitter substance that is produced by the Treg cells, seems to play an important role during a stroke. Mice with no functioning Treg cells that were injected with IL 10 on the first day following a stroke had markedly less brain damage than mice that did not receive IL 10. On the other hand, the transfer of genetically modified Treg cells unable to produce IL-10 offered no protection.

The researchers in Heidelberg are now working on different approaches for translating the protective mechanisms of Treg into future treatment for strokes. "We still need to know a lot more about how the immune cells communicate among themselves and with the brain cells after a stroke in order to develop a treatment plan for patients,” says Dr. Roland Veltkamp.


Story Source:

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


Journal Reference:

  1. Liesz et al. Regulatory T cells are key cerebroprotective immunomodulators in acute experimental stroke. Nature Medicine, 2009; 15 (2): 192 DOI: 10.1038/nm.1927

Cite This Page:

University Hospital Heidelberg. "Stroke Recovery: 'First Aid' For Brain Cells Comes From Blood." ScienceDaily. ScienceDaily, 21 April 2009. <www.sciencedaily.com/releases/2009/04/090416102258.htm>.
University Hospital Heidelberg. (2009, April 21). Stroke Recovery: 'First Aid' For Brain Cells Comes From Blood. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2009/04/090416102258.htm
University Hospital Heidelberg. "Stroke Recovery: 'First Aid' For Brain Cells Comes From Blood." ScienceDaily. www.sciencedaily.com/releases/2009/04/090416102258.htm (accessed October 31, 2014).

Share This



More Health & Medicine News

Friday, October 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

U.S. Ebola Response Measures Demonstrated

U.S. Ebola Response Measures Demonstrated

AP (Oct. 31, 2014) Officials in the Washington area showed off Ebola response measures being taken at Dulles International Airport and the National Institutes of Health. (Oct. 31) Video provided by AP
Powered by NewsLook.com
Fauci Says Ebola Risk in US "essentially Zero"

Fauci Says Ebola Risk in US "essentially Zero"

AP (Oct. 30, 2014) NIAID Director Anthony Fauci said the risk of Ebola becoming an epidemic in the U.S. is essentially zero Thursday at the Washington Ideas Forum. He also said an Ebola vaccine will be tested in West Africa in the next few months. (Oct. 30) Video provided by AP
Powered by NewsLook.com
Nurse Defies Ebola Quarantine With Bike Ride

Nurse Defies Ebola Quarantine With Bike Ride

AP (Oct. 30, 2014) A nurse who vowed to defy Maine's voluntary quarantine for health care workers who treated Ebola patients followed through on her promise Thursday, leaving her home for an hour-long bike ride. (Oct. 30) Video provided by AP
Powered by NewsLook.com
Pot-Infused Edibles Raise Concerns in Colorado

Pot-Infused Edibles Raise Concerns in Colorado

AFP (Oct. 30, 2014) Colorado may have legalized marijuana for recreational use, but the debate around the decision still continues, with a recent - failed - attempt to ban cannabis-infused edibles. Duration: 01:53 Video provided by AFP
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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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