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Erschienen in: Brain Structure and Function 6/2019

16.05.2019 | Short Communication

Transcriptomic profile of the subiculum-projecting VIP GABAergic neurons in the mouse CA1 hippocampus

verfasst von: Xiao Luo, Einer Muñoz-Pino, Ruggiero Francavilla, Maxime Vallée, Arnaud Droit, Lisa Topolnik

Erschienen in: Brain Structure and Function | Ausgabe 6/2019

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Abstract

In cortical circuits, the vasoactive intestinal peptide (VIP+)-expressing GABAergic cells represent a heterogeneous but unique group of interneurons that is mainly specialized in network disinhibition. While the physiological properties and connectivity patterns have been elucidated in several types of VIP+ interneurons, little is known about the cell type-specific molecular repertoires important for selective targeting of VIP+ cell types and understanding their functions. Using patch-sequencing approach, we analyzed the transcriptomic profile of anatomically identified subiculum-projecting VIP+ GABAergic neurons that reside in the mouse hippocampal CA1 area, express muscarinic receptor 2 and coordinate the hippocampo-subicular interactions via selective innervation of interneurons in the CA1 area and of interneurons and pyramidal cells in subiculum. We explored the VIP+ cell gene expression within major gene families including ion channels, neurotransmitter receptors, neuromodulators, cell adhesion and myelination molecules. Among others, a large variety of genes involved in neuromodulatory signaling, including acetylcholine (Chrna4), norepinephrin (Adrb1), dopamine (Drd1), serotonin (Htr1d), cannabinoid (Cnr1), opioid (Oprd1, Oprl1) and neuropeptide Y (Npy1r) receptors was detected in these cells. Many genes that were enriched in other local VIP+ cell types, including the interneuron-selective interneurons and the cholecystokinin-coexpressing basket cells, were detected in VIP+ subiculum-projecting cells. In addition, the neuronatin (Nnat) and the Purkinje Cell Protein 4 (Pcp4) genes, which were detected previously in long-range projecting GABAergic neurons, were also common for the subiculum-projecting VIP+ cells. The expression of some genes was validated at the protein level, with proenkephalin being identified as an additional molecular marker of this VIP+ cell type. Together, our data indicate that the VIP+ subiculum-projecting cells share molecular identity with other VIP+ and long-range projecting GABAergic neurons, which can be important for specific function of these cells associated with their local and distant projection patterns.
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Metadaten
Titel
Transcriptomic profile of the subiculum-projecting VIP GABAergic neurons in the mouse CA1 hippocampus
verfasst von
Xiao Luo
Einer Muñoz-Pino
Ruggiero Francavilla
Maxime Vallée
Arnaud Droit
Lisa Topolnik
Publikationsdatum
16.05.2019
Verlag
Springer Berlin Heidelberg
Erschienen in
Brain Structure and Function / Ausgabe 6/2019
Print ISSN: 1863-2653
Elektronische ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-019-01883-z

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