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- W2066330966 abstract "Preclinical studies have identified numerous neuroprotective drugs that attenuate brain damage and improve functional outcome after cerebral ischemia. Despite this success in animal models, neuroprotective therapies in the clinical setting have been unsuccessful. Identification of biochemical markers common to preclinical and clinical cerebral ischemia will provide a more sensitive and objective measure of injury severity and outcome to facilitate clinical management and treatment. However, there are currently no effective biomarkers available for assessment of stroke. Nonerythroid alphaII-spectrin is a cytoskeletal protein that is cleaved by calpain and caspase-3 proteases to signature alphaII-spectrin breakdown products (alphaII-SBDPs) after cerebral ischemia in rodents. This investigation examined accumulation of calpain- and caspase-3-cleaved alphaII-SBDPs in cerebrospinal fluid (CSF) of rodents subjected to 2 hours of transient focal cerebral ischemia produced by middle cerebral artery occlusion (MCAO) followed by reperfusion. After MCAO injury, full-length alphaII-spectrin protein was decreased in brain tissue and increased in CSF from 24 to 72 hours after injury. Whereas alphaII-SBDPs were undetectable in sham-injured control animals, calpain but not caspase-3 specific alphaII-SBDPs were significantly increased in CSF after injury. However, caspase-3 alphaII-SBDPS were observed in CSF of some injured animals. These results indicate that alphaII-SBDPs detected in CSF after injury, particularly those mediated by calpain, may be useful diagnostic indicators of cerebral infarction that can provide important information about specific neurochemical events that have occurred in the brain after acute stroke." @default.
- W2066330966 created "2016-06-24" @default.
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- W2066330966 date "2004-01-01" @default.
- W2066330966 modified "2023-09-24" @default.
- W2066330966 title "Accumulation of Calpain and Caspase-3 Proteolytic Fragments of Brain-Derived αII-Spectrin in Cerebral Spinal Fluid after Middle Cerebral Artery Occlusion in Rats" @default.
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- W2066330966 doi "https://doi.org/10.1097/01.wcb.0000098520.11962.37" @default.
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