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• W1990710316 startingPage "879" @default.
• W1990710316 abstract "Accumulation of calcium following experimental traumatic brain injury (TBI) has been demonstrated to be a prominent pathophysiological component that can compromise mitochondrial functioning and threaten cell survival. The omega-conopeptide SNX-111, also known as Ziconotide, is a potent antagonist of the voltage-gated N-type calcium channel and has demonstrated significant neuroprotective effects against ischemia-induced neuronal injury. To determine whether this compound would be effective in reducing calcium accumulation associated with TBI, SNX-111 was administered intravenously to rats 1 hour following a moderate (2.2 to 2.75 atm) lateral fluid-percussion injury (or sham) at doses of 1 (n = 30), 3 (n = 31), or 5 (n = 30) mg/kg; another group received 0.9% saline solution (n = 35). Brains were processed for calcium 45 (45Ca) autoradiography at 6, 12, 24, 48, and 96 hours following insult. Optical density measurements of 20 cortical and subcortical regions were analyzed. Injured animals administered saline solution exhibited a significant increase in 45Ca uptake within 12 regions ipsilateral to the site of injury. The most prominent increases were evident throughout the ipsilateral cerebral cortex. SNX-111 reduced the injury-induced calcium accumulation within the ipsilateral cortex in a dose-response fashion when measured at 6, 12, and 48 hours after insult. These drug-induced reductions in calcium accumulation were as high as 75% in the ipsilateral cerebral cortex, and up to 50% in other ipsilateral regions (including thalamus and hippocampus). Consequently, the results suggest that posttraumatic blocking of the voltage-gated N-type calcium channel after injury reduces prolonged, trauma-induced calcium accumulation." @default.
• W1990710316 created "2016-06-24" @default.
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• W1990710316 date "1999-10-01" @default.
• W1990710316 modified "2023-10-03" @default.
• W1990710316 title "Effects of an N-type Calcium Channel Antagonist (SNX 111; Ziconotide) on Calcium-45 Accumulation Following Fluid-Percussion Injury" @default.
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• W1990710316 doi "https://doi.org/10.1089/neu.1999.16.879" @default.
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