Neuroprotection afforded by diazepam against oxygen/glucose deprivation-induced injury in rat cortical brain slices.

Abstract:

:The aim of the present investigation was to assess neuroprotection exerted by diazepam (0.1-25 microM) in rat cortical brain slices subjected to oxygen-glucose deprivation and reoxygenation. Neuronal injury and neuroprotection were assessed by measuring the release of glutamate and lactate dehydrogenase and tissue water content. Results demonstrate that diazepam exerted neuroprotective effects according to a "U-shaped", hormetic-like, concentration-response curve, with an efficacy window of 0.5-5 microM concentration. Flumazenil (20 microM) fully antagonised neuroprotection afforded by 5 microM diazepam. In conclusion, the hormetic response of diazepam should be taken into consideration when designing experiments aimed at assessing diazepam neuroprotection against ischemia/reoxygenation injury.

journal_name

Eur J Pharmacol

authors

Ricci L,Valoti M,Sgaragli G,Frosini M

doi

10.1016/j.ejphar.2006.12.030

subject

Has Abstract

pub_date

2007-04-30 00:00:00

pages

80-4

issue

1-3

eissn

0014-2999

issn

1879-0712

pii

S0014-2999(07)00051-9

journal_volume

561

pub_type

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