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  Tuning of Neuronal Interactions in the Lateral Ventral Tegmental Area by Dopamine Sensitivity

van der Velden, L., Vinck, M., Werkman, T. R., & Wadman, W. J. (2017). Tuning of Neuronal Interactions in the Lateral Ventral Tegmental Area by Dopamine Sensitivity. Neuroscience, 366. doi:10.1016/j.neuroscience.2017.10.009.

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資料種別: 学術論文
その他のタイトル : Neuroscience

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 作成者:
van der Velden, L., 著者
Vinck, M.1, 著者
Werkman, T. R., 著者
Wadman, W. J., 著者
所属:
1Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Max Planck Society, Deutschordenstr. 46, 60528 Frankfurt, DE, ou_2074314              

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 要旨: The Ventral Tegmental Area (VTA) contains a considerable population of rhythmically firing dopaminergic neurons, which are influenced by auto-inhibition due to extra-synaptic dopamine release resulting in volume transmission. Using a Multi-Electrode-Array we simultaneously recorded in vitro from multiple VTA dopamine neurons in the rat and studied their mutual interactions. We observed that the dopamine sensitivity (EC50) of the neurons (i.e. the relation between dopamine concentration and firing rate) was quite variable within the recorded population. The interactions between pairs of neurons were quantified using the Granger causality. We found that the dopamine sensitivity determined the role of a neuron in the local VTA population. Highly sensitive neurons became followers (of the population rhythm), whereas less sensitive dopamine neurons played a more leading role. This was confirmed by the application of sulpiride which reduces the dopamine sensitivity of all neurons through competition and abolishes the structure in the interactions. These findings imply that therapeutics, which have an easy to understand effect on firing rate, could have a more complicated effect on the functional organization of the local VTA population, through volume transmission principles.

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 日付: 2017
 出版の状態: 出版
 ページ: -
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 識別子(DOI, ISBNなど): URI: http://www.ncbi.nlm.nih.gov/pubmed/29037597
その他: 1607
DOI: 10.1016/j.neuroscience.2017.10.009
 学位: -

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出版物名: Neuroscience
  出版物の別名 : Neuroscience
種別: 学術雑誌
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出版社, 出版地: -
ページ: 62-69 巻号: 366 通巻号: - 開始・終了ページ: - 識別子(ISBN, ISSN, DOIなど): ISBN: 1873-7544 (Electronic)0306-4522 (Linking)