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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

A selective N-type Ca(2+)-channel blocker prevents CA1 injury 24 h following severe forebrain ischemia and reduces infarction following focal ischemia.

SNX-111 (NEUREX Corporation, Menlo Park, CA, U.S.A.) an omega-conopeptide, was tested for cytoprotection following normothermic ischemia using both a four-vessel occlusion model of severe forebrain ischemia and a model of transient middle cerebral artery occlusion focal ischemia. Adult male Wistar rats were subjected to 10 min of forebrain ischemia followed by 7 days of reperfusion. A single dose of SNX-111 (5 mg/kg) was injected intravenously following delays of either 6 or 24 h after reperfusion. For 11 rats treated with saline, there was 78 +/- 13% CA1 neuronal injury (mean +/- SD); for 11 given SNX-111 delayed by 6 h, injury was reduced to 35 +/- 30% (p < 0.01); and remarkably, treatment delayed by 24 h (n = 10), still resulted in protection, with only 50 +/- 29% injury (p < 0.05). Adult male spontaneously hypertensive rats had transient occlusion of the right middle cerebral artery of 1.5- or 2-h duration followed by 22.5 or 22 h of reperfusion, respectively. Rats were randomly assigned to receive either saline or SNX-111 (5 mg/kg i.v.), with treatment starting immediately after reperfusion (1.5-h ischemic group) or at 1 h following the onset of ischemia (2-h ischemic group). In the 1.5-h ischemic group, saline-treated animals sustained 138 +/- 32 mm3 of neocortical infarction (n = 9), and SNX-111 treatment resulted in an infarct reduction to 76 +/- 25 mm3 (n = 9; p < 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)[1]

References

  1. A selective N-type Ca(2+)-channel blocker prevents CA1 injury 24 h following severe forebrain ischemia and reduces infarction following focal ischemia. Buchan, A.M., Gertler, S.Z., Li, H., Xue, D., Huang, Z.G., Chaundy, K.E., Barnes, K., Lesiuk, H.J. J. Cereb. Blood Flow Metab. (1994) [Pubmed]
 
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