New! Sign up for our free email newsletter.
Science News
from research organizations

Brain’s Reserve Cells Can Be Activated After Stroke

Date:
March 2, 2009
Source:
Karolinska Institutet
Summary:
Scientists have found a way of activating the neuronal reserves in the brains of mice by switching off the signal that inhibits the formation of new nerve cells.
Share:
FULL STORY

Scientists at the Swedish medical university Karolinska Institutet have found a way of activating the neuronal reserves in the brains of mice by switching off the signal that inhibits the formation of new nerve cells.

"So far, this is just basic research of no immediate practical significance, but the results are very exciting nonetheless," says Professor Jonas Frisén at the Department of Cell and Molecular Biology, who led the study.

New nerve cells are formed from stem cells in specific areas of the human brain. This process increases after a stroke, something that might explain the recovery that is often observed in patients, particularly in the first year following the onset of illness. In the present study, the scientists have demonstrated how a type of cell that does not give rise to new cells in the healthy brain is activated after a stroke in laboratory animals.

In addition to the stem cells that are normally active, there is therefore also a kind of reserve stock of cells the can be activated when demand increases. The team have identified the molecular mechanisms that control the activation of these cells, and shown that it is possible to increase the formation of new nerve cells in healthy mice by switching off the so-called Notch signalling pathway, which inhibits the creation of new nerve cells.


Story Source:

Materials provided by Karolinska Institutet. Note: Content may be edited for style and length.


Journal Reference:

  1. Carlén et al. Forebrain ependymal cells are Notch-dependent and generate neuroblasts and astrocytes after stroke. Nature Neuroscience, Feb 22, 2009; DOI: 10.1038/nn.2268

Cite This Page:

Karolinska Institutet. "Brain’s Reserve Cells Can Be Activated After Stroke." ScienceDaily. ScienceDaily, 2 March 2009. <www.sciencedaily.com/releases/2009/02/090223083346.htm>.
Karolinska Institutet. (2009, March 2). Brain’s Reserve Cells Can Be Activated After Stroke. ScienceDaily. Retrieved October 10, 2024 from www.sciencedaily.com/releases/2009/02/090223083346.htm
Karolinska Institutet. "Brain’s Reserve Cells Can Be Activated After Stroke." ScienceDaily. www.sciencedaily.com/releases/2009/02/090223083346.htm (accessed October 10, 2024).

Explore More

from ScienceDaily

RELATED STORIES