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• W2056411700 abstract "Magnesium ions have been shown to be a promising treatment for brain lesions caused by traumatic brain injury (TBI), as well as for the associated acute neurodegeneration and progressive functional deficits. This study investigated the effects of magnesium on the expression of the cell death/survival related proteins following TBI. Male Sprague-Dawley (SD) rats (n = 66, 280-320 g body weight) were subjected to sham surgery alone (n = 14), or to the surgery followed by a lateral fluid percussion brain injury of moderate severity (n = 52, 2.4-2.7 atm). The injured rats were randomly treated with an intravenous bolus of magnesium chloride (n = 26, 125 micromol) or saline vehicle (n = 26). The coronal brain sections were quantitatively analyzed for cell apoptosis and the expression of p53-related proteins, Bcl-2, cyclin D1 and PCNA at 1, 2, and 4 days post-injury by immunohistochemistry or in situ hybridization. Tissue damage was observed primarily in the ipsilateral cortex of the injured region with the induction of apoptosis and p53 mRNA level at 2 days after TBI. The expression of p53 and responding proteins (p21(WAF1/CIP1), Mdm2 and Bax) showed a temporal pattern similar to the apoptotic events in the time course experiments. They were induced in the early time points of days 1-2, decreasing by day 4 after TBI. In contrast, the expression of the cell survival related proteins - Bcl-2, cyclin D1, and PCNA - was most significant at day 4 post-injury, when the rate of apoptosis decreased. Magnesium treatment resulted in a reduction in apoptosis and expression of p53-related proteins. However, it had only a slight additive effect on the expression of the survival related proteins in the same time-course. These results provide a molecular basis for the efficiency of magnesium in treating TBI-induced tissue damage." @default.
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• W2056411700 date "2004-05-01" @default.
• W2056411700 modified "2023-09-27" @default.
• W2056411700 title "A Molecular Basis for the Efficacy of Magnesium Treatment following Traumatic Brain Injury in Rats" @default.
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• W2056411700 doi "https://doi.org/10.1089/089771504774129883" @default.
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