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sigma(1)-receptor ligand 4-phenyl-1-(4-phenylbutyl)-piperidine affords neuroprotection from focal ischemia with prolonged reperfusion
Journal article   Open access   Peer reviewed

sigma(1)-receptor ligand 4-phenyl-1-(4-phenylbutyl)-piperidine affords neuroprotection from focal ischemia with prolonged reperfusion

I Harukuni, A Bhardwaj, A B Shaivitz, A C DeVries, E D London, P D Hurn, R J Traystman, Jeffrey R Kirsch and F M Faraci
Stroke (1970), Vol.31(4), pp.976-981
04/2000
DOI: 10.1161/01.STR.31.4.976
PMID: 10754008
url
https://doi.org/10.1161/01.STR.31.4.976View
Published (Version of record) Open Access

Abstract

We previously showed that the intravenous administration of the potent final sigma(1)-receptor ligand 4-phenyl-1-(4-phenylbutyl)-piperidine (PPBP) provides neuroprotection against transient focal cerebral ischemia and that the protection depends on treatment duration. We tested the hypothesis that PPBP would provide neuroprotection in a model of transient focal ischemia and 7 days of reperfusion in the rat as assessed with neurobehavioral outcome and infarction volume. Under the controlled conditions of normoxia, normocarbia, and normothermia, halothane-anesthetized male Wistar rats were subjected to 2 hours of middle cerebral artery occlusion (MCAO) with the intraluminal suture occlusion technique. We used laser Doppler flowmetry to assess MCAO. At 60 minutes after the onset of ischemia, rats were randomly assigned to 1 of 4 treatment groups in a blinded fashion and received a continuous intravenous infusion of control saline or 0.1, 1, or 10 micromol. kg(-1). h(-1) PPBP for 24 hours. Neurobehavioral evaluation was performed at baseline (3 to 4 days before MCAO) and at 3 and 7 days of reperfusion. Infarction volume was assessed with triphenyltetrazolium chloride staining on day 7 of reperfusion in all rats. Triphenyltetrazolium chloride-determined infarction volume of ipsilateral cortex was smaller in rats treated with 10 micromol. kg(-1). h(-1) PPBP (n=15, 68+/-12 mm(3), 18+/-3% of contralateral structure, P<0.05) (mean+/-SEM) compared with corresponding rats treated with saline (n=15, 114+/-11 mm(3), 31+/-3% of contralateral structure). PPBP did not provide significant neuroprotection in the caudoputamen complex. Although MCAO was associated with several alterations in behavior, the treatment with PPBP had no effect on behavioral outcomes. The data demonstrate that the potent final sigma(1)-receptor ligand PPBP decreases cortical infarction volume without altering neurobehavior after transient focal ischemia and prolonged reperfusion in the rat.
Ligands Brain Ischemia - complications Neuroprotective Agents - therapeutic use Drug Administration Schedule Rats, Wistar Reperfusion Injury - pathology Haloperidol - analogs & derivatives Haloperidol - administration & dosage Haloperidol - therapeutic use Rats Male Brain Ischemia - physiopathology Animals Brain Ischemia - drug therapy Haloperidol - metabolism Brain Ischemia - psychology Cerebral Infarction - etiology Behavior, Animal - drug effects Receptors, sigma - metabolism Cerebral Infarction - pathology

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