Neuroprotection achieved in the ischaemic rat cortex with L-kynurenine sulphate |
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Authors: | Robotka Hermina Sas Katalin Agoston Márta Rózsa Eva Szénási Gábor Gigler Gábor Vécsei László Toldi József |
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Institution: | Department of Physiology, Anatomy and Neuroscience, University of Szeged, POB 533, H-6701 Szeged, Hungary. |
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Abstract: | L-kynurenine is a metabolic precursor of kynurenic acid, which is one of the few known endogenous N-methyl-D-aspartate receptor inhibitors. In contrast with kynurenic acid, L-kynurenine is transported across the blood-brain barrier, and it may therefore come into consideration as a therapeutic agent in certain neurobiological disorders, e.g. ischaemia-induced events. The present study evaluated the effect of L-kynurenine administration (300 mg/kg i.p.) on the global ischaemic brain cortex both pre- and post-ischemic intervention. The statistical evaluation revealed that L-kynurenine administration beneficially decreased the number of neurones injured per mm(2) in the cortex, not only in the pre-treated animals, but also in those which received L-kynurenine after the ischaemic insult. It is concluded that even the post-traumatic administration of L-kynurenine may be of substantial therapeutic benefit in the treatment of global brain ischaemia. This is the first histological proof of the neuroprotective effect achieved by the post-traumatic administration of L-kynurenine in the global ischaemic cortex. |
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