Stroke, Vol 23, 247-252, Copyright © 1992 by American Heart Association
R Takeshima, JR Kirsch, RC Koehler, AW Gomoll and RJ Traystman
BACKGROUND AND PURPOSE: We tested the hypothesis that inhibition of
leukocyte function by administration of monoclonal antibody 60.3 (MoAb
60.3) improves electrophysiological recovery and decreases injury volume
following transient focal cerebral ischemia in cats. METHODS:
Halothane-anesthetized cats underwent 90 minutes of left middle cerebral
artery and bilateral common carotid artery occlusion followed by 180
minutes of reperfusion. Cats were assigned to receive either 2 mg/kg MoAb
60.3 (n = 8) directed at the CDw18 leukocyte antigen complex or an equal
volume of diluent (sterile saline; n = 10) at 45 minutes of ischemia in a
blinded fashion. RESULTS: Blood flow to the left temporoparietal cortex
decreased to less than 5 ml/min/100 g with ischemia, but was minimally
affected on the right side. Postischemic hyperemia occurred in the left
caudate nucleus, whereas blood flow in other brain regions returned to
control. No region demonstrated delayed hypoperfusion, and there were no
differences between groups. Somatosensory evoked potential recorded over
the left cortex was ablated during ischemia and recovered to less than 10%
of baseline amplitude at 180 minutes of reperfusion in both groups. Left
hemispheric injury volume, as assessed by 2,3,5-triphenyltetrazolium
chloride staining, was not affected by drug treatment (mean +/- SE values:
MoAb 60.3, 37 +/- 5%; placebo, 38 +/- 7% of hemisphere). CONCLUSIONS:
Inhibition of leukocyte function with MoAb 60.3 does not afford protection
from severe focal ischemia and reperfusion in cats.
ARTICLES
Monoclonal leukocyte antibody does not decrease the injury of transient focal cerebral ischemia in cats
Department of Anesthesiology and Critical Care Medicine, Johns Hopkins Medical Institutions, Baltimore, Md.
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