Caspase-9: Involvement in secondary death of axotomized rat retinal ganglion cells in vivo
| Autor: | John C. Reed, R Ankerhold, Stan Krajewski, Mathias Bähr, Nikolaj Klöcker, Pawel Kermer |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Retinal Ganglion Cells
Cell Survival medicine.medical_treatment Apoptosis Cysteine Proteinase Inhibitors Retinal ganglion Neuroprotection Rats Sprague-Dawley Cellular and Molecular Neuroscience Neurotrophic factors medicine Animals Insulin-Like Growth Factor I Molecular Biology Caspase Retina biology Brain-Derived Neurotrophic Factor Axotomy Caspase Inhibitors Caspase 9 Rats Cell biology Neuroprotective Agents medicine.anatomical_structure Caspases Optic nerve biology.protein Female sense organs Oligopeptides Neuroscience |
| Zdroj: | Molecular Brain Research. 85:144-150 |
| ISSN: | 0169-328X |
| Popis: | Recently we have shown that adult rat retinal ganglion cells (RGCs) die by apoptosis following optic nerve (ON) transection, activating caspase-3. In the present study, we report that caspase-9, known to be an important activator of caspase-3, becomes activated in the axotomized adult rat retina as revealed by immunoblot analysis and protease activity assays. Reduction of caspase-9 activity by repeated intraocular injection of specific inhibitors significantly prevented RGC death. Caspase-9 activity was effectively blocked by inhibitor treatment and by application of IGF-I and BDNF, neurotrophic factors which have been shown to be highly neuroprotective in this model. Taken together, our data suggest that caspase-9 plays a critical role in apoptosis induction in axotomized RGCs in vivo and is regulated under treatment with growth and survival factors. Thus, providing more insight into the mechanisms underlying neuronal death and survival following trauma might serve as a basis to improve future therapeutic strategies preventing or at least reducing the severe consequences of neuronal injury. |
| Databáze: | OpenAIRE |
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