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New period of brain 'plasticity' created with transplanted embryonic cells
Date:3/25/2010

am when transplanted into the postnatal cortex, thereby creating a new period of plasticity.

"The findings suggest it ultimately might be possible to use inhibitory neuron transplantation, or some factor that is produced by inhibitory neurons, to create a new period of plasticity of limited duration for repairing damaged brains," says author Sunil P. Gandhi, PhD, a postdoctoral fellow in the lab of Michael Stryker, PhD, professor of physiology and a member of the Keck Center for Integrative Neurosciences at UCSF. "It will be important to determine whether transplantation is equally effective in older animals."

Likewise, "the results raise a fundamental question: how do these cells, as they pass through a specific stage in their development, create these windows of plasticity?" says author Derek G. Southwell, PhD, a student in the lab of Arturo Alvarez-Buylla, PhD, Heather and Melanie Muss Professor of Neurological Surgery and a member of the Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research at UCSF.

The findings could be relevant to understanding why learning certain behaviors, such as language, occurs with ease in young children but not in adults, says Alvarez-Buylla. "Grafted MGE cells may some day provide a way to induce cortical plasticity and learning later in life."

The findings also complement two other recent UCSF studies using MGE cells to modify neural circuits. In a collaborative study among the laboratories of Scott Baraban, PhD, professor of neurological surgery; John Rubenstein, MD, PhD, professor of psychiatry, and Alvarez-Buylla, the cells were grafted into the neocortex of juvenile rodents, where they reduced the intensity and frequency of epileptic seizures. (Proceedings of the National Academy of Science, vol. 106, no. 36, 2009). Other teams are exploring this tactic, as well.

In the other study (Cell Stem Cell, vol. 6, issue 3, 2010), UCSF scientists reported the firs
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Contact: Jennifer O'Brien
jobrien@pubaff.ucsf.edu
415-476-2557
University of California - San Francisco
Source:Eurekalert

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