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Neuronal death after brain injury. Models, mechanisms, and therapeutic strategies in vivo.

Neuronal damage in the central nervous system leads to primary cell death, induced directly by the trauma, and delayed secondary death of neurons, the latter depending on environmental changes, lack of metabolic and trophic supply, and altered gene transcription. While primary death of neurons occurring within a short time after trauma is not a realistic target for therapy, secondary cell death might be prevented by new neuroprotective strategies. Although there are increasing data concerning cell rescue after ischemic and traumatic brain injury through the last decade, the mechanisms that underlie secondary death of neurons following lesion are still incompletely understood and are now the subject of a more detailed investigation. In this review, we want to give an overview on what is known about the molecular mechanisms of delayed ischemic and traumatic neuronal death in vivo and about promising neuroprotective treatment strategies that might be of future clinical relevance or have already entered clinical trials.