Candelario-Jalil E, Muñoz E, Fiebich BL. Detrimental effects of tropisetron on permanent ischemic stroke in the rat.
BMC Neurosci 2008;
9:19. [PMID:
18254974 PMCID:
PMC2259310 DOI:
10.1186/1471-2202-9-19]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2007] [Accepted: 02/06/2008] [Indexed: 12/30/2022] Open
Abstract
Background
Recent in vitro evidence indicates that blockade of 5-hydroxytryptamine (5-HT) receptor 3 (5-HT3) is able to confer protection in different models of neuronal injury. The purpose of the present study was to investigate the effect of tropisetron, a 5-HT3 receptor antagonist, on infarct size and neurological score in a model of ischemic stroke induced by permanent middle cerebral artery occlusion (pMCAO) in the rat.
Methods
Two different doses of tropisetron (5 and 10 mg/kg) or vehicle were administered intraperitoneally 30 min before pMCAO. Neurological deficit scores, mortality rate and infarct volume were determined 24 h after permanent focal cerebral ischemia.
Results
Tropisetron failed to reduce cerebral infarction. Animals receiving tropisetron showed a significant increase (p < 0.05) in neurological deficits and mortality rate.
Conclusion
Data from this study indicate that blockade of 5-HT3 receptors with tropisetron worsens ischemic brain injury induced by pMCAO. These findings could have important clinical implications. Patients taking tropisetron, and possibly other 5-HT3 antagonists, could potentially have a worse outcome following a brain infarct.
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