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Abstract
新しいnon-NMDA拮抗薬であるYM90Kをカイニン酸誘発痙攣をおこしたラットで2-デオキシグルコース(2-DG)法を用いて検討した。海馬の興奮性経路であるtrisynaptic pathwayのうちYM90KはSchaffer側副路を選択的にブロックし,カイニン酸投与7日後の組織所見ではCA1-2の細胞を温存させ,一方,コントロール,およびMK-801グループでは同側副路はブロックされず結果としてCA1-2の錐体細胞は脱落した。本研究においてYM90Kの神経細胞保護作用を示すと共に,2-DG法がカイニン酸誘発痙攣の初期の病態を示す方法として有用であった。
To investigate the effects of a new non-NMDA antagonist on the trisynaptic pathways in the hippocampus, the author examined the kainate (KA)-induced generalized seizures in rats. A novel non-NMDA antagonist, YM90K, showed the blockade of the Schaffer collaterals in a 2-deoxyglucose study (2-DG) and that the CA1-2 pyramidal cells of the hippocampus were preserved seven days after the KA injections. On the other hand, the control and MK-801 (NMDA-antagonist) treated rats did not depress the Schaffer collaterals and showed persistent hypermetabolism of glucose in the CA1 pyramidal cell layer, where neurons were not preserved seven days later. 2-DG was useful to reveal the effects of a non-NMDA antagonist on the KA-induced generalized seizures. This suggests that YM90K is a potent non-NMDA antagonist and that it has a neuroprotective effect in rats.
Journal
- Journal of UOEH [List of Volumes]
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Journal of UOEH 19(1), 1-12, 1997-03-01 [Table of Contents]
The UOEH Association of Health Sciences