Abstract:
:The cellular architecture of the ventral tegmental area (VTA), the main hub of the brain reward system, remains only partially characterized. To extend the characterization to inhibitory neurons, we have identified three distinct subtypes of somatostatin (Sst)-expressing neurons in the mouse VTA. These neurons differ in their electrophysiological and morphological properties, anatomical localization, as well as mRNA expression profiles. Importantly, similar to cortical Sst-containing interneurons, most VTA Sst neurons express GABAergic inhibitory markers, but some of them also express glutamatergic excitatory markers and a subpopulation even express dopaminergic markers. Furthermore, only some of the proposed marker genes for cortical Sst neurons were expressed in the VTA Sst neurons. Physiologically, one of the VTA Sst neuron subtypes locally inhibited neighboring dopamine neurons. Overall, our results demonstrate the remarkable complexity and heterogeneity of VTA Sst neurons and suggest that these cells are multifunctional players in the midbrain reward circuitry.
journal_name
Elifejournal_title
eLifeauthors
Nagaeva E,Zubarev I,Bengtsson Gonzales C,Forss M,Nikouei K,de Miguel E,Elsilä L,Linden AM,Hjerling-Leffler J,Augustine GJ,Korpi ERdoi
10.7554/eLife.59328subject
Has Abstractpub_date
2020-08-04 00:00:00issn
2050-084Xpii
59328journal_volume
9pub_type
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