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- W1995718108 abstract "We examined characteristics of spreading depression (SD) induced on the rat cortex 1 day after transient focal ischemia. Male Wistar rats (n=21) were subjected to transient intraluminal thread occlusion of the right middle cerebral artery for 75 min. Twenty-four hours after the reperfusion, cerebral blood flow (CBF) was determined using laser Doppler flowmeter during multiple SDs elicited on both non-stroke (left) and stroke (right) cortex by the topical application of 2 M KCl. We also examined CBF responses before and after the intravenous administration of the nonspecific NOS inhibitor Nomega-nitro-L-arginine methyl ester (L-NAME, 10 mg/kg) in normal and stroke cortex. Animals were divided into two groups; Group 1 (n=12), animals with subcortical infarction and Group 2 (n=9), animals with subcortical plus cortical infarction. There were no differences between non-stroke and stroke sides in the duration or amplitude of the DC potential shifts in either group. The transient CBF hyperemia during SD was not different between non-stroke (372+/-23% of baseline, mean+/-S.E.) and stroke sides (383+/-30%) in Group 1. However, in Group 2, CBF was significantly restricted on the stroke side (192+/-15% vs. non-stroke side, 374+/-33%). In four normal animals without ischemia, there were no differences in CBF response between both sides. L-NAME had no effect on the transient CBF hyperemia during SD in any of the groups. These data suggest that the CBF responses during SD in the peri-infarction area is restricted 1 day after the transient focal ischemia, while CBF responses are intact in normal cortex overlapping a subcortical infarct. Further, our results indicate that nitric oxide does not promote CBF responses during SD in normal cortex or in tissue surrounding infarction." @default.
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- W1995718108 date "2000-04-01" @default.
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- W1995718108 title "Characteristics of induced spreading depression after transient focal ischemia in the rat" @default.
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- W1995718108 doi "https://doi.org/10.1016/s0006-8993(00)02032-1" @default.
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