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Fundamental role of the Rip2/caspase-1 pathway in hypoxia and ischemia-induced neuronal cell death
- Publication Year :
- 2003
- Publisher :
- National Academy of Sciences, 2003.
-
Abstract
- Caspase-1 plays a key role in inflammatory pathways by processing pro-IL-1β into the active cytokine mature IL-1β. Given its sequence similarity with the Caenorhabditis elegans cell death gene ced-3 ,it has long been speculated that caspase-1 may also play a role in cell death. However, an unequivocal role for caspase-1 in cell death has been questioned, and not definitively demonstrated. Furthermore, if caspase-1 does play a role in cell death, its position in the apoptotic hierarchy has not been clearly defined. Previous studies have shown that caspase-1 knockout (KO) mice and transgenic mice expressing a dominant-negative caspase-1 construct are resistant to ischemic brain injury. We provide direct evidence that caspase-1 plays a key role in neuronal cell death and that caspase-1 is an apical activator of the cell death pathway in the premitochondrial collapse stage. Furthermore, we demonstrate that Rip2/Cardiak/Rick is a stress-inducible upstream modulator of pro-caspase-1 apoptotic activation. We provide evidence that Bid cleavage appears to be an important downstream effector of caspase-1-mediated cell death. Our data demonstrate that caspase-1 is an apical mediator of neuronal cell death during in vitro hypoxia, and confirmed in vivo in ischemia, and provide insights into the sequence of events involved in this pathological cell death process.
- Subjects :
- Genetically modified mouse
Programmed cell death
medicine.medical_treatment
Caspase 1
Apoptosis
Protein Serine-Threonine Kinases
Brain Ischemia
Mice
Receptor-Interacting Protein Serine-Threonine Kinase 2
medicine
Animals
Caenorhabditis elegans
Cerebral Cortex
Mice, Knockout
Neurons
Multidisciplinary
biology
Cell Death
L-Lactate Dehydrogenase
Effector
Cytochromes c
Biological Sciences
biology.organism_classification
Cell Hypoxia
Cell biology
Enzyme Activation
Cytokine
Cell Death Process
Caspases
Receptor-Interacting Protein Serine-Threonine Kinases
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....bbe9d7904d309411fe5cc91d71b225b8