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Caspase function in neuronal death: delineation of the role of caspases in ischemia
Giselle F Prunell1, Valerie A Arboleda, Carol M Troy
1Department of Pathology, Taub Institute for the Study of Alzheimer's Disease and the Aging Brain, Columbia University College of Physicians and Surgeons, 630 W 168 ST, New York, NY 10032, USA.
Abstract:
Cerebral ischemia is one of the major causes of morbidity and mortality in the Western world. Despite extensive research, adequate therapies are still elusive. Neuronal degeneration and death are hallmarks of stroke/ischemia. Understanding how the death machinery executes neuronal death in ischemia will provide therapeutic targets. Key to the death machinery are caspases: the family of cell death proteases. While much data has been published regarding caspase involvement in models of ischemia, the pathways have not been thoroughly defined. The specification of the caspases critical for death has been hampered by the use of non-specific reagents. Thus many conclusions about specificity are unwarranted. In this review we discuss how caspases can be measured and review the existing knowledge of the roles of specific caspases in ischemia. We also discuss approaches to determining the molecules that execute ischemic death.
Insights
Cerebral ischemia causes significant death and disability. This review clarifies the role of caspases, key proteases in neuronal death, and discusses methods to identify therapeutic targets for stroke.
Area of Science:
- Neuroscience
- Molecular Biology
- Pathology
Background:
- Cerebral ischemia is a leading cause of death and disability globally.
- Neuronal degeneration is a primary consequence of stroke, necessitating better therapeutic strategies.
- Caspases, a family of proteases, are critical executioners of programmed cell death.
Purpose of the Study:
- To review the current understanding of caspase involvement in cerebral ischemia.
- To discuss methods for accurately measuring caspase activity in ischemic conditions.
- To identify specific caspases crucial for neuronal death in stroke and potential therapeutic targets.
Main Methods:
- Literature review of studies investigating caspase roles in ischemia.
- Discussion of techniques for quantifying caspase activity.
- Analysis of data from studies using specific caspase inhibitors or genetic models.
Main Results:
- Existing research on caspase involvement in ischemia is extensive but often lacks specificity due to reagent limitations.
- Accurate measurement of specific caspases is crucial for understanding their precise roles in ischemic neuronal death.
- Several caspases are implicated, but their exact contribution and interplay require further definition.
Conclusions:
- Defining the specific caspases responsible for neuronal death in cerebral ischemia is essential for developing targeted therapies.
- Improved methodologies are needed to overcome limitations of non-specific reagents in current research.
- Further investigation into caspase pathways may reveal novel therapeutic targets for stroke treatment.
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