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New neurons don’t heal

Study shows neurogenesis doesn’t produce all the cell types needed to repair brain injury

Rubbernecking neurons don’t do an injured brain any good. Newborn neurons rush to the scene of the damage but don’t pitch in to help heal the wound, a new study shows.

Scientists have had great hopes that new neurons produced in the brain after a stroke or other insult could migrate to the wounded area and replace damaged cells. Previous research has shown that the newborns are attracted to injury sites, but a new study that appears in the April 22 Journal of Neuroscience shows that those neurons don’t form replacements for the majority of cells. The results indicate that simply boosting neuron production may not help heal the brain.

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