Abstract
Currently, it is accepted that brain injury promotes endogenous neurogenesis in mammals, primarily in the subventricular zone (SVZ), and newborn cells can migrate to the injured area. We examined the pattern of endogenous neurogenesis in adult rats after intracerebral hemorrhage (ICH) that was caused by intrastrial administration of collagenase type IV. Our results showed that ICH induced strong endogenous neurogenesis between 72 hours and 7 days after injury, but that the majority of newborn cells did not survive longer than 3 weeks due to apoptosis-mediated cell death. Furthermore, endogenous neurogenesis remained into a small extent at least 1 year after ICH. Because of the growing interest in new strategies for brain regeneration, these data suggest endogenous neurogenesis and inhibiting apoptosis of newborn neuroblasts as potential strategies to improve the consequences of hemorrhagic stroke in humans.
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