کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2014377 | 1067155 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Rapidly induced dopaminergic supersensitivity: D1/D2 receptor participation and its prevention by an MAO-inhibitor
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The dopaminergic system requires combined dopamine D1/D2 receptor stimulation to express its activity; a phenomenon called synergism D1/D2. Dopamine receptors develop supersensitivity following dopamine de-afferentation and/or reserpine treatment. Acute supersensitivity occurs with reserpine treatment. The breakdown of D1/D2 synergism has been proposed implicating the genesis of this kind of supersensitivity. We sought to determine the best conditions for inducing acute dopaminergic supersensitivity evaluated by apomorphine-induced stereotyped behaviour, to examine whether D1/D2 synergism breakdown occurs in this reserpine-induced acute supersensitivity model, and whether it can be prevented by the monoamino-oxidase (MAO) inhibitor selegiline. Reserpine (2.0Â mg/kg) was injected 3Â h before apomorphine (0.6Â mg/kg) induced stereotypy. D1/D2 synergism was investigated using specific antagonists (D1-SKF 83566 2.5Â mg/kg, D2-haloperidol 2.0Â mg/kg) and selegiline (10Â mg/kg) was used to analyze the influence of dopamine “de-novo” synthesis. All antagonist treatments suppressed stereotypy and selegiline prevented supersensitivity. These data suggest that reserpine-induced acute dopaminergic supersensitivity is not due to the breakdown of D1/D2 synergism and such supersensitivity can be prevented by recently synthesised dopamine.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Pharmacology Biochemistry and Behavior - Volume 85, Issue 3, November 2006, Pages 592-600
Journal: Pharmacology Biochemistry and Behavior - Volume 85, Issue 3, November 2006, Pages 592-600
نویسندگان
Ana Kleinman, Carla A. Tieppo, Gabriela M. Florez, Luciano F. Felicio, Antonia G. Nasello,