Neuronal Necrosis in a Dog Following Exposure to an NMDA Receptor Antagonist
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概要
- 論文の詳細を見る
N-methyl-D-aspartate (NMDA) receptors constitute one of the three major classes of ionotropic glutamate receptors. We found neuronal necrosis in the brain of one out of four beagles exposed to an NMDA receptor antagonist. The lesions were characterized by shrunken cell bodies with intense cytoplasmic eosinophilia and pyknotic nuclei, and the affected cells were specifically positive for Fluoro-Jade B staining, which has great affinity for degenerating neurons. Bilaterally symmetrical lesions were observed primarily in the dentate gyrus, hippocampus, subiculum and entorhinal cortex. The present case suggests that NMDA receptor antagonism, possibly by altering synaptic transmission via receptors to glutamate within the affected regions, might lead to neuronal necrosis in the canine brain. Other possible pathogeneses include the encephalic ischemic condition associated with seizure activity.
- 日本毒性病理学会の論文
- 2008-09-30
著者
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SHIRAI NORIMITSU
Drug Safety Evaluation, Nagoya Laboratories, Pfizer Global Research and Development
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HORII IKUO
Drug Safety Evaluation, Nagoya Laboratories, Pfizer Global Research and Development
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Nii Aisuke
Drug Safety Research And Development Pfizer Global Research & Development Nagoya Laboratories
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Nii Aisuke
Drug Safety Research & Development Nagoya Laboratories Pfizer Global Research And Development
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Shirai Norimitsu
Drug Safety Research And Development Pfizer Global Research & Development Nagoya Laboratories
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Horii Ikuo
Drug Safety Research And Development Pfizer Global Research & Development Nagoya Laboratories
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Horii Ikuo
Drug Safety Evaluation Pfizer Global Research And Development
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Horii Ikuo
Drug Safety Evaluation Global Research & Development Pfizer Inc.
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