PuSH - Publikationsserver des Helmholtz Zentrums München: Transgenic overexpression of corticotropin releasing hormone provides partial protection against neurodegeneration in an in vivo model of acute excitotoxic stress.

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Hanstein, R.* ; Lu, A.* ; Wurst, W. ; Holsboer, F.* ; Deussing, J.M.* ; Clement, A.B.* ; Behl, C.*

Transgenic overexpression of corticotropin releasing hormone provides partial protection against neurodegeneration in an in vivo model of acute excitotoxic stress.

Neuroscience 156, 712-721 (2008)

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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.

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Corticotropin releasing hormone (CRH) is the central modulator of the mammalian hypothalamic-pituitaryadrenal (HPA) axis. In addition, CRH affects other processes in the brain including learning, memory, and synaptic plasticity. Moreover, CRH has been shown to play a role in nerve cell survival under apoptotic conditions and to serve as an endogenous neuroprotectant in vitro. Employing mice over-expressing murine CRH in the CNS, we observed a differential response of CRH-overexpressing mice (CRH-COEhom-Nes) to acute excitotoxic stress induced by kainate compared with controls (CRH-COEcon-Nes). Interestingly, CRH-overexpression reduced the duration of epileptic seizures and prevented kainate-induced neurodegeneration and neuro-inflammation in the hippocampus. Our findings highlight a neuroprotective action of CRH in vivo. This neuroprotective effect was accompanied by increased levels of brain-derived neurotrophic factor (BDNF) in CRH-COEhom-Nes mice, suggesting a potential role for BDNF in mediating CRH-induced neuroprotective actions against acute excitotoxicity in vivo.

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