Dopamine oppositely modulates state transitions in striosome and matrix direct pathway striatal spiny neurons
| Autor: | Zachary B. Hobel, Daniel B. Dorman, Eric M. Prager, Kim T. Blackwell, Joshua L. Plotkin, Jeffrey M. Malgady |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Calcium Channels L-Type Striosome Dopamine Mice Transgenic Striatum Medium spiny neuron Article Mice 03 medical and health sciences 0302 clinical medicine Dopamine receptor D1 Bias Postsynaptic potential medicine Animals Neurons Chemistry General Neuroscience Receptors Dopamine D1 Dendrites Benzazepines Calcium Channel Blockers Corpus Striatum 030104 developmental biology Dopamine receptor Synapses Excitatory postsynaptic potential Dopamine Antagonists Isradipine Neuroscience 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Neuron |
| Popis: | Corticostriatal synaptic integration is partitioned among striosome (patch) and matrix compartments of the dorsal striatum, allowing compartmentalized control of discrete aspects of behavior. Despite the significance of such organization, it's unclear how compartment-specific striatal output is dynamically achieved, particularly considering new evidence that overlap of afferents is substantial. We show that dopamine oppositely shapes responses to convergent excitatory inputs in mouse striosome and matrix striatal spiny projection neurons (SPNs). Activation of postsynaptic D1 dopamine receptors promoted the generation of long-lasting synaptically evoked "up-states" in matrix SPNs but opposed it in striosomes, which were more excitable under basal conditions. Differences in dopaminergic modulation were mediated, in part, by dendritic voltage-gated calcium channels (VGCCs): pharmacological manipulation of L-type VGCCs reversed compartment-specific responses to D1 receptor activation. These results support a novel mechanism for the selection of striatal circuit components, where fluctuating levels of dopamine shift the balance of compartment-specific striatal output. |
| Databáze: | OpenAIRE |
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