کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6272723 1614786 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dopamine-dependent corticostriatal synaptic filtering regulates sensorimotor behavior
ترجمه فارسی عنوان
فیلتر کردن سیناپسی وابسته به دوپامین وابسته به دوپامین، رفتار سنسوری را تنظیم می کند
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
چکیده انگلیسی


- Corticostriatal synaptic filtering is absent following dopamine lesion.
- Filtering is not reinstated by l-DOPA or D2 agonist, which overactivate behavior.
- With a CB1 receptor antagonist, l-DOPA or D2 agonists normalize synaptic filtering and behavior.
- Filtering by D2, mGlu-R5, and CB1 receptors is required for normal sensorimotor behavior.

Modulation of corticostriatal synaptic activity by dopamine is required for normal sensorimotor behaviors. After loss of nigrostriatal dopamine axons in Parkinson's disease, l-3,4-dihydroxyphenlalanine (l-DOPA) and dopamine D2-like receptor agonists are used as replacement therapy, although these drugs also trigger sensitized sensorimotor responses including dyskinesias and impulse control disorders. In mice, we lesioned dopamine projections to the left dorsal striatum and assayed unilateral sensorimotor deficits with the corridor test as well as presynaptic corticostriatal activity with the synaptic vesicle probe, FM1-43. Sham-lesioned mice acquired food equivalently on both sides, while D2 receptor activation filtered the less active corticostriatal terminals, a response that required coincident co-activation of mGlu-R5 metabotropic glutamate and CB1 endocannabinoid receptors. Lesioned mice did not acquire food from their right, but overused that side following treatment with l-DOPA. Synaptic filtering on the lesioned side was abolished by either l-DOPA or a D2 receptor agonist, but when combined with a CB1 receptor antagonist, l-DOPA or D2 agonists normalized both synaptic filtering and behavior. Thus, high-pass filtering of corticostriatal synapses by the coordinated activation of D2, mGlu-R5, and CB1 receptors is required for normal sensorimotor response to environmental cues.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuroscience - Volume 290, 2 April 2015, Pages 594-607
نویسندگان
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