Effects of Repeated Cold Stress on Aversive Responses Produced by Intrathecal Excitatory Amino Acids in Rats
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概要
- 論文の詳細を見る
We previously demonstrated the involvement of spinal glutamatergic system in repeated cold stress (RCS)-induced hyperalgesia. In the present experiments, to estimate the involvement of an enhancement of responsiveness to endogenously released glutamate in RCS-induced hyperalgesia, we examined the effects of RCS on behavioral nociceptive responses (biting or licking the hind paws and the tail) produced by intrathecal injections of selective agonists at subtypes of glutamate receptor, N-methyl-D-aspartate (NMDA), α-amino-3-hydroxy-5-methylisoxazole-4-propionate (AMPA) and kainate, in rats. The exposure of rats to RCS significantly intensified the behavioral responses produced by intrathecal NMDA (1 nmol/rat) in comparison to the control rats. The increase in the behavioral response of the RCS rats to AMPA was significant at a dose of 1 nmol/rat of AMPA as compared to the control rats. A significant increase in aversive response over control rats was not seen when kainate (0.3-3 nmol/rat) was injected into the spinal subarachnoid space of the RCS rats. These results suggest that RCS induces an enhancement of transmission mediated by endogenously released glutamate through NMDA and non-NMDA (especially AMPA) receptors in the spinal dorsal horn.
- 社団法人日本薬学会の論文
- 1995-11-15
著者
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倉石 泰
Department Of Applied Biochemistry Research Institute For Wakan-yaku Toyama Medical And Pharmaceutic
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岡野 一彦
Department of Pharmacology Faculty of Pharmaceutical Sciences, Kyoto University
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佐藤 公道
Department of Molecular Pharmacology, Faculty of Pharmaceutical Sciences, Kyoto University
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岡野 一彦
Department Of Pharmacology Faculty Of Pharmaceutical Sciences Kyoto University
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佐藤 公道
Department Of Pharmacology Faculty Of Pharmaceutical Sciences Kyoto University
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Satoh M
Department Of Biochemistry Faculty Of Pharmaceutical Sciences Health Sciences University Of Hokkaido
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佐藤 公道
Department Of Biochemistry Faculty Of Pharmaceutical Sciences Health Sciences University Of Hokkaido
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