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  • Stem Cell Offers Hope for Stroke-Damaged Brain

Stem Cell Offers Hope for Stroke-Damaged Brain

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iGovernment
09 March 2009
London, UK

By inserting tiny scaffolding with stem cells attached, it is possible to fill a hole left by stroke damage with brand new brain tissue within seven days
Soon there might be some good news for patients suffering from stroke as scientists from London’s Institute of Psychiatry and University of Nottingham have now succeeded in replacing stroke–damaged brain tissue in rats.

The effective stem cell treatment for strokes received a boost when the researchers showed that by inserting tiny scaffolding with stem cells attached, it is possible to fill a hole left by stroke damage with brand new brain tissue within seven days, reports IANS.

Previous experiments where stem cells have been injected into the void left by stroke damage have had some success in improving outcomes in rats.

The problem is that in the damaged area there is no structural support for the stem cells and so they tend to migrate into the surrounding healthy tissues rather than filling up the hole left by the stroke.

Mike Modo who led the research team said: “We would expect to see a much better improvement in the outcome after a stroke if we can fully replace the lost brain tissue, and that is what we have been able to do with our technique.”

Using individual particles of a biodegradable polymer called PLGA that have been loaded with neural stem cells, the team of scientists have filled stroke cavities with stem cells on a ready–made support structure, an Institute of Psychiatry release said.

“This works really well because the stem cell–loaded PLGA particles can be injected through a very fine needle and then adopt the precise shape of the cavity,” it added.

According to Modo, the process allows the cells to fill in the cavity and can make connections with other cells, which helps to establish the tissue.

“Over a few days we can see cells migrating along the scaffold particles and forming a primitive brain tissue that interacts with the host brain. Gradually the particles biodegrade leaving more gaps and conduits for tissue, fibres and blood vessels to move into,” he explained.

The research uses an MRI scanner to pinpoint precisely the right place to inject the scaffold–cell structure. MRI was also used to monitor the development of the new brain tissue over time, the release stated.

The next stage of the research will be to include a factor called VEGF with the particles. VEGF will encourage blood vessels to enter the new tissue.

The study was published in Biomaterials.

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