Repeated cocaine administration differentially affects NMDA receptor subunit (NR1, NR2A-C) mRNAs in rat brain
| العنوان: | Repeated cocaine administration differentially affects NMDA receptor subunit (NR1, NR2A-C) mRNAs in rat brain |
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| المؤلفون: | Takafumi Hori, Shuzo Abe, Takashi Asada, Mika Yamaguchi, Toshihito Suzuki, Nobuo Okado, Hirofumi Kurita, Heii Arai |
| المصدر: | Synapse. 46:157-169 |
| بيانات النشر: | Wiley, 2002. |
| سنة النشر: | 2002 |
| مصطلحات موضوعية: | Male, Time Factors, Striatum, Nucleus accumbens, Pharmacology, Hippocampal formation, Receptors, N-Methyl-D-Aspartate, Drug Administration Schedule, Rats, Sprague-Dawley, Cellular and Molecular Neuroscience, Deoxyadenine Nucleotides, Cocaine, Sulfur Isotopes, Animals, RNA, Messenger, Anesthetics, Local, Receptor, In Situ Hybridization, Behavior, Animal, Dose-Response Relationship, Drug, Chemistry, musculoskeletal, neural, and ocular physiology, Dentate gyrus, Glutamate receptor, Brain, Rats, Protein Subunits, Globus pallidus, Gene Expression Regulation, nervous system, Autoradiography, NMDA receptor, Stereotyped Behavior |
| الوصف: | We investigated the effects of intermittent intraperitoneal (i.p.) injections of cocaine (20 mg/kg) on subunit mRNAs of N-methyl-D-aspartate (NMDA) receptors (NR1/NR2A-2C) in the rat brain by in situ hybridization using phosphor screen analysis. The level of NR1 subunit mRNA significantly increased in hippocampal complexes 1 h after a single i.p. injection of cocaine. After repeated cocaine injection, the mean scores of stereotyped behavior were increased with the number of injections. The level of NR1 subunit mRNA was obviously decreased in the striatum and cortices 24 h (early withdrawal) after a final injection following 14 days of subchronic administration. During the early withdrawal period, the amount of the NR1 subunit decreased in the nucleus accumbens, globus pallidus, and subiculum. In the dentate gyrus, the NR1 mRNA level significantly increased during early withdrawal in rats subchronically treated with cocaine. Levels of NR2B subunit mRNA were reduced in the cortices and striatum. During late withdrawal from cocaine, the level of NR2C subunit mRNA in the cerebellum was also reduced. These findings suggest that the disruption of NR1, NR2B, and NR2C subunits in the discrete brain regions occurs under the cocaine-related behavioral abnormalities and would be closely implicated in the initiation and expression of behavioral sensitization induced by repeated cocaine administration. Further studies on the changes in non-NMDA receptors are required to elucidate the biological significance of glutamate receptors for the mechanisms underlying the development of behavioral sensitization. |
| تدمد: | 1098-2396 0887-4476 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21ffb7618c7408a12057bf47e633173b https://doi.org/10.1002/syn.10132 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....21ffb7618c7408a12057bf47e633173b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10982396 08874476 |
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