Pre-ischemic depletion of brain norepinephrine decreases infarct size in normothermic rats exposed to transient focal cerebral ischemia.

Published

Journal Article

This study examined the importance of brain norepinephrine concentration on outcome from a focal ischemic insult. Fasted temperature-controlled male Wistar rats pretreated with DSP-4, (N-(chloroethyl)-N-ethyl-2-bromobenzylamine), to selectively deplete brain norepinephrine, were subjected to reversible filament occlusion of the middle cerebral artery for 75 min in the awake state. After 3 days recovery, total infarct volume in DSP-4 treated rats (185 +/- 107 mm3) was reduced vs. untreated control animals (242 +/- 71 mm3, P = 0.04). Subcortical infarct volume was also smaller in the DSP-4 group (93 +/- 44 vs. 121 +/- 28 mm3, P = 0.02). Cortical infarct volume was not statistically different between groups. Neurologic function correlated with infarct-size. These findings suggest that brain norepinephrine affects stroke development either by direct neuronal toxicity and/or through influences on the penumbral circulation. Dampening of the central stress response induced by the onset of stroke may thus be advantageous.

Full Text

Duke Authors

Cited Authors

  • Nellgård, B; Mackensen, GB; Sarraf-Yazdi, S; Miura, Y; Pearlstein, R; Warner, DS

Published Date

  • November 19, 1999

Published In

Volume / Issue

  • 275 / 3

Start / End Page

  • 167 - 170

PubMed ID

  • 10580701

Pubmed Central ID

  • 10580701

International Standard Serial Number (ISSN)

  • 0304-3940

Digital Object Identifier (DOI)

  • 10.1016/s0304-3940(99)00743-0

Language

  • eng

Conference Location

  • Ireland