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http://purl.uniprot.org/citations/17712625http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttp://purl.uniprot.org/core/Journal_Citation
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Aims

Taurine as an endogenous substance possesses a number of cytoprotective properties. In the study, we have evaluated the neuroprotective effect of taurine and investigated whether taurine exerted neuroprotection through affecting calpain/calpastatin or caspase-3 actions during focal cerebral ischemia, since calpain and caspase-3 play central roles in ischemic neuronal death.

Methods

Male Sprague-Dawley rats were subjected to 2 h of middle cerebral artery occlusion (MCAo), and 22 h of reperfusion. Taurine was administrated intravenously 1 h after MCAo. The dose-responses of taurine to MCAo were determined. Next, the effects of taurine on the activities of calpain, calpastatin and caspase-3, the levels of calpastatin, microtubule-associated protein-2 (MAP-2) and alphaII-spectrin, and the apoptotic cell death in penumbra were evaluated.

Results

Taurine reduced neurological deficits and decreased the infarct volume 24 h after MCAo in a dose-dependent manner. Treatment with 50 mg/kg of taurine significantly increased the calpastatin protein levels and activities, and markedly reduced the m-calpain and caspase-3 activities in penumbra 24 h after MCAo, however, it had no significant effect on mu-calpain activity. Moreover, taurine significantly increased the MAP-2 and alphaII-spectrin protein levels, and markedly reduced the ischemia-induced TUNEL staining positive score within penumbra 24 h after MCAo.

Conclusions

Our data demonstrate the dose-dependent neuroprotection of taurine against transient focal cerebral ischemia, and suggest that one of protective mechanisms of taurine against ischemia may be blocking the m-calpain and caspase-3-mediated apoptotic cell death pathways."xsd:string
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http://purl.uniprot.org/citations/17712625http://purl.uniprot.org/core/author"Sun M."xsd:string
http://purl.uniprot.org/citations/17712625http://purl.uniprot.org/core/author"Xu C."xsd:string
http://purl.uniprot.org/citations/17712625http://purl.uniprot.org/core/date"2008"xsd:gYear
http://purl.uniprot.org/citations/17712625http://purl.uniprot.org/core/name"Cell Mol Neurobiol"xsd:string
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http://purl.uniprot.org/citations/17712625http://purl.uniprot.org/core/title"Neuroprotective mechanism of taurine due to up-regulating calpastatin and down-regulating calpain and caspase-3 during focal cerebral ischemia."xsd:string
http://purl.uniprot.org/citations/17712625http://purl.uniprot.org/core/volume"28"xsd:string
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