In this study, we used a rat model of severe closed traumatic brain injury to explore the relationship between neuroglobin, brain injury and neuronal apoptosis. Real-time PCR showed that neuroglobin mRNA expression rapidly increased in the rat cerebral cortex, and peaked at 30 minutes and 48 hours following traumatic brain injury. Immunohistochemical staining demonstrated that neuroglobin expression increased and remained high 2 hours to 5 days following injury. The rate of increase in the apoptosis-related Bax/Bcl-2 ratio greatly decreased between 30 minutes and 1 hour as well as between 48 and 72 hours post injury. Expression of neuroglobin and the anti-apoptotic factor Bcl-2 greatly increased, while that of the proapoptotic factor decreased, in the cerebral cortex post severe closed traumatic brain injury. It suggests that neuroglobin might protect neurons from apoptosis after traumatic injury by regulating Bax/Bcl-2 pathway.
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| http://dx.doi.org/10.3969/j.issn.1673-5374.2012.25.006 | DOI Listing |
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